A method for controlling a shijiazhuang moth

Abstract

The application discloses a kind of prevention and treatment method of locusts of pagoda tree, belong to the technical field of insect control, first prepare a kind of locusts of pagoda tree food lure, then tie a layer of straw pad at the lower end of the trunk of whole tree, spray locusts of pagoda tree food lure on straw pad, and loosen soil in the area where pagoda tree is planted, and raise poultry in the control area to prevent and treat locusts of pagoda tree.The application does not need to prevent and treat according to the growth cycle of locusts of pagoda tree with different agents and measures, and will not cause pollution and damage to the environment, can reduce the damage of locusts of pagoda tree to pagoda tree, inhibit the eating of locusts of pagoda tree, so as to have better insecticidal effect and longer action period.

Description

Technical Field

[0001] The present invention relates to the technical field of insect control, and in particular to a method for controlling a Sophora japonica looper. Background Art

[0002] Sophora japonica, also known as Chinese Sophora japonica and Bean Sophora japonica, is a deciduous tree in the genus Sophora of the family Fabaceae. It grows fast, has a straight grain, is cold-resistant and drought-resistant, is easy to manage, and has a flexible texture that facilitates processing. It can be planted along city roads, in private courtyards, or in parks, where it grows beautifully, is highly resistant to pollution, and provides excellent greening effects. There are few major pests of Sophora japonica, primarily including the Sophora japonica looper and the Sophora japonica psyllid. The Sophora japonica looper, commonly known as the "hanged ghost," is a leaf-feeding pest prone to outbreaks. Its body is green, and its larvae feed on leaves, leaving notches. Damage is less severe in the first and second instars, but it begins to gorge after the third instar. In severe cases, it can consume all Sophora japonica leaves within a week, and its feces pollute the environment, seriously affecting the gardening function of the Sophora japonica.

[0003] Currently, the key technologies for the prevention and control of Sophora japonica loopers include biological control, physical control, and chemical control. Biological control mainly involves the use of wasps or biological agents. Among them, Bacillus thuringiensis powder is used for prevention and control when larvae occur. However, the effectiveness of prevention and control is limited by temperature and other factors, and it is not very effective when the Sophora japonica looper eats a lot. Physical control uses insect traps and killing methods. This method is ideal for short-term control, but it cannot completely eradicate the insects. The prevention and control range is small, labor-intensive and time-consuming, with low efficiency and prone to residual phenomena. Chemical control requires long-term use of chemical agents, which is prone to drug resistance and recurrence rate. It requires increased dosage and has an unpleasant smell when sprayed, affecting air quality and causing respiratory discomfort.

[0004] Therefore, it is necessary to find a method for preventing and controlling the Sophora japonica looper to solve the technical problems of the current prevention and control of the Sophora japonica looper, such as the limitation of the prevention and control time and temperature and the pollution of the environment. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a method for controlling Sophora japonica looper to solve the problem that the current use of pesticides to control Sophora japonica looper can only be effective against Sophora japonica loopers in a certain growth cycle and is prone to pollution.

[0006] The present invention solves the above technical problems through the following technical means:

[0007] A method for preventing and controlling Sophora japonica looper is as follows:

[0008] (1) Tie a layer of straw mat at the bottom of the tree trunk and spray the straw mat with Sophora japonica looper attractant;

[0009] (2) Loosen the soil in the area where Sophora japonica trees are planted, and release poultry in the control area to prevent and control Sophora japonica loopers.

[0010] Furthermore, the attractant needs to be diluted before spraying, and the mass ratio of the Sophora japonica looper attractant to water is 1: (15-20).

[0011] Furthermore, the spraying amount is 1-3 kg of the diluted Sophora japonica looper attractant sprayed on one tree.

[0012] Furthermore, the sophora japonica looper attractant comprises the following raw materials:

[0013] 0.6-1.1 parts by mass of citrus peel extract, 0.3-0.8 parts by mass of catechins, 1.4-2.2 parts by mass of straw juice, 0.2-0.5 parts by mass of sodium alginate, 2.4-3.4 parts by mass of animal sponges, 1.2-2.3 parts by mass of nandina domestica roots, 1.2-1.4 parts by mass of shrimp shells, and 1.1-2 parts by mass of glycerin.

[0014] Furthermore, the preparation method of the sophora japonica looper attractant is as follows:

[0015] (1) Drying an animal sponge and grinding it into powder to obtain animal sponge powder; grinding nandina domestica roots into powder, adding 60% ethanol for extraction, and centrifuging to obtain an extract; and evaporating and concentrating the extract to obtain nandina domestica concentrate;

[0016] (2) Put the shrimp shells and glycerol into a 24 mol / L sodium hydroxide solution and stir and mix them. Heat while stirring. After heating to 130°C, keep the constant temperature to react for 8 hours. After the reaction is completed, filter to obtain a precipitate. Wash the precipitate and dry it to obtain reactant A.

[0017] (3) Weigh animal sponge powder, reactant A, straw juice and water and mix them evenly to form a uniform and stable suspension. Add citrus peel extract, nandina domestica concentrate and catechin to the suspension, ultrasonicate at 400-500W for 25-38min, then react in a water bath at 40-50℃ hot water for 0.5-2h, centrifuge at 3000-3500r / min for 10-20min to obtain a precipitate; freeze-dry the obtained precipitate, stabilize it, add water and sodium alginate and stir evenly to obtain a Sophora japonica looper attractant.

[0018] The Sophora japonica looper has three generations a year, and the pest outbreak lasts a long time. The chemical reagents currently used for Sophora japonica loopers are ineffective against all stages of the looper and can only be used during the adult stage. Moreover, the use of chemical reagents is prone to environmental pollution. Therefore, straw juice is added to the prepared attractant. After the attractant dilution is sprayed on the straw mat, the Sophora japonica looper is lured to burrow into the straw mat. The odor induced by the mixture of straw juice and leaves in the attractant further induces the Sophora japonica looper to feed. When the larvae are just hatched, they eat less and are most sensitive to the drug. After the larvae feed, a small amount of attractant enters their bodies. Since the outermost layer of the attractant is formed by sodium alginate wrapped around other raw materials to form an outer gel, after the outer gel in the agent decomposes, the citrus peel extract and nandina domestica root concentrate can take effect and kill the larvae. As the insect ages, the locust looper's food intake increases dramatically. When the amount of drug in the locust looper's body is insufficient to reach a lethal dose, the animal sponges and shrimp shells in the drug can block the synthesis of appetite-related enzymes in the locust looper, prompting the locust looper to increase its food intake. In other words, the locust looper can continuously feed on the drug sprayed on the straw mat, causing the drug in its body to reach a lethal dose and die. In addition, a small number of dead locust loopers will burrow into the soil on cloudy days. The smell of citrus peel contained in the food attractant can lure poultry to eat. At the same time, the ingredients in citrus peel and animal sponges are not only toxic to locust loopers, but also increase their appetite. These two substances encourage poultry to search for and eliminate locust loopers, eliminating the need for separate prevention and control measures based on the locust looper's growth cycle, and will not cause pollution or damage to the environment.

[0019] Furthermore, the extraction method of the citrus peel extract is as follows:

[0020] Weigh citrus peel, add 60wt% ethanol to soak, reflux extract twice, the extraction time is 2h, and the reflux extracts obtained twice are combined to obtain citrus peel extract.

[0021] Furthermore, in the preparation method of the Sophora japonica looper attractant, the freeze-drying temperature of step (3) is -20°C and the time is 10-12 hours.

[0022] Furthermore, the poultry is one or more of chickens, ducks, and pigeons.

[0023] Beneficial effects:

[0024] (1) The raw materials used in the attractant for Sophora japonica looper prepared by the present invention are toxic only to Sophora japonica looper and do not harm the environment. The prepared attractant can kill Sophora japonica looper of all insect age stages and has a good insecticidal effect. In addition, it can promote the feeding of poultry. Eating high-protein food is also beneficial to the improvement of meat nutrition.

[0025] (2) The control method of the present invention can effectively kill the Sophora japonica looper. In the late growth stage of the Sophora japonica looper larvae, when the killing dose is increased, it can also reduce the damage caused by the Sophora japonica looper to the Sophora japonica and inhibit the feeding of the Sophora japonica looper, thereby having a better insecticidal effect and a longer action period. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 :Sophora japonica geometrids in the experimental site DETAILED DESCRIPTION

[0027] The present invention will be described in detail below with reference to the embodiments and accompanying drawings:

[0028] Example 1: Preparation of extract

[0029] Tangerine peel extract: citrus peel was soaked in 60 wt% ethanol and refluxed for 2 times, each time for 2 h. The reflux extracts obtained from the two times were combined to obtain the tangerine peel extract.

[0030] Example 2: Control of Sophora japonica looper

[0031] The present invention provides a method for preventing and controlling a Sophora japonica looper. However, a Sophora japonica looper attractant needs to be prepared before the prevention and control is carried out. The straw juice of the present invention is obtained by freshly squeezing the juice from corn straw or sorghum straw.

[0032] Preparation of Sophora japonica geometre attractant:

[0033] (1) 2.9 kg of animal sponges were dried in the sun and ground into powder, and the powder was passed through a 100-mesh sieve to obtain animal sponge powder; 1.8 kg of nandina domestica roots were ground into powder, passed through a 200-mesh sieve, and extracted with 18 kg of 60 wt% ethanol and centrifuged to obtain an extract, which was evaporated and concentrated to 0.5 times the original total mass to obtain nandina domestica concentrate;

[0034] (2) 1.3 kg of shrimp shells and 1.5 kg of glycerol were placed in 1.3 kg of 24 mol / L sodium hydroxide solution and stirred and mixed. The mixture was heated while stirring. After heating to 130 °C, the temperature was kept constant for 8 hours. After the reaction was completed, the precipitate was filtered to obtain a precipitate. The precipitate was washed and dried to obtain reactant A.

[0035] (3) The animal sponge powder, reactant A, 1.8 kg of straw juice and 7.5 kg of water were mixed evenly to form a uniform and stable suspension. 0.9 kg of citrus peel extract, nandina domestica concentrate and 0.5 kg of catechin were added to the suspension and ultrasonicated at 450 W for 32 min. The suspension was then reacted in a water bath at 45 ° C for 1.5 h. The suspension was centrifuged at 3200 r / min for 15 min to obtain a precipitate. The obtained precipitate was freeze-dried at -20 ° C for 11 h. After the precipitate was stabilized, 0.3 kg of water and 0.3 kg of sodium alginate were added and stirred evenly to obtain a Sophora japonica looper attractant.

[0036] Prevention and control steps:

[0037] (1) After preparing the Sophora japonica looper attractant, dilute the prepared Sophora japonica looper attractant with a mass ratio of attractant to water of 1:18. Tie a layer of straw mat at the bottom of the tree trunk, 1 cm thick and 50 cm long, and spray the diluted Sophora japonica looper attractant on the straw mat. The spraying amount for each tree is 2 kg, and spray once every 10 days.

[0038] (2) Loosen the soil in the area where Sophora japonica trees are planted, and release chickens in the control area to control Sophora japonica loopers at a density of 2 chickens per 5 trees.

[0039] Example 3: Control of Sophora japonica looper II

[0040] The present invention provides a method for preventing and controlling a Sophora japonica looper, but a Sophora japonica looper attractant needs to be prepared before the prevention and control.

[0041] Preparation of Sophora japonica geometre attractant:

[0042] (1) 2.4 kg of animal sponges were dried in the sun and ground into powder, and the powder was passed through a 100-mesh sieve to obtain animal sponge powder; 1.2 kg of nandina domestica roots were ground into powder, passed through a 200-mesh sieve, and extracted with 12 kg of 60 wt% ethanol and then centrifuged to obtain an extract, which was evaporated and concentrated to 0.5 times the original total mass to obtain nandina domestica concentrate;

[0043] (2) 1.2 kg of shrimp shells and 1.1 kg of glycerol were placed in 1.2 kg of 24 mol / L sodium hydroxide solution and stirred and mixed. The mixture was heated while stirring. After heating to 130 °C, the temperature was kept constant for 8 hours. After the reaction was completed, the precipitate was filtered to obtain a precipitate. The precipitate was washed and dried to obtain reactant A.

[0044] (3) The animal sponge powder, reactant A, 1.4 kg straw juice and 6.1 kg water were mixed evenly to form a uniform and stable suspension. 0.6 kg citrus peel extract, nandina domestica concentrate and 0.3 kg catechin were added to the suspension and ultrasonicated at 400 W for 38 min. The suspension was then reacted in a water bath at 40 ° C for 2 h. The suspension was centrifuged at 3000 r / min for 20 min to obtain a precipitate. The obtained precipitate was freeze-dried at -20 ° C for 11 h. After the precipitate stabilized, 0.2 kg water and 0.2 kg sodium alginate were added and stirred evenly to obtain a Sophora japonica looper attractant.

[0045] Prevention and control steps:

[0046] (1) After preparing the Sophora japonica looper attractant, dilute the prepared Sophora japonica looper attractant with a mass ratio of attractant to water of 1:15. Tie a layer of straw mat at the bottom of the tree trunk, 1 cm thick and 50 cm long, and spray the diluted Sophora japonica looper attractant on the straw mat. The spraying amount for each tree is 1 kg, and spray once every 10 days.

[0047] (2) Loosen the soil in the area where Sophora japonica trees are planted, and release chickens in the control area to control Sophora japonica loopers at a density of 2 chickens per 5 trees.

[0048] Example 4: Control of Sophora japonica looper

[0049] The present invention provides a method for preventing and controlling a Sophora japonica looper, but a Sophora japonica looper attractant needs to be prepared before the prevention and control.

[0050] Preparation of Sophora japonica geometre attractant:

[0051] (1) 3.4 kg of animal sponges were dried in the sun and ground into powder, and the powder was passed through a 100-mesh sieve to obtain animal sponge powder; 2.3 kg of nandina domestica roots were ground into powder, and the powder was passed through a 200-mesh sieve, and the powder was extracted with 23 kg of 60 wt% ethanol and centrifuged to obtain an extract; the extract was evaporated and concentrated to 0.5 times the original total mass to obtain nandina domestica concentrate;

[0052] (2) 1.4 kg of shrimp shells and 2 kg of glycerol were placed in 1.4 kg of 24 mol / L sodium hydroxide solution and stirred and mixed. The mixture was heated while stirring. After heating to 130 °C, the temperature was kept constant for 8 hours. After the reaction was completed, the precipitate was filtered to obtain a precipitate. The precipitate was washed and dried to obtain reactant A.

[0053] (3) The animal sponge powder, reactant A, 2.2 kg of straw juice and 9 kg of water were mixed evenly to form a uniform and stable suspension. 1.1 kg of citrus peel extract, nandina domestica concentrate and 0.8 kg of catechin were added to the suspension and ultrasonicated at 500 W for 38 min. The suspension was then reacted in a water bath at 50 ° C for 0.5 h. The suspension was centrifuged at 3500 r / min for 10 min to obtain a precipitate. The obtained precipitate was freeze-dried at -20 ° C for 11 h. After the precipitate stabilized, 0.5 kg of water and 0.5 kg of sodium alginate were added and stirred evenly to obtain a Sophora japonica looper attractant.

[0054] Prevention and control steps:

[0055] (1) After preparing the Sophora japonica looper attractant, dilute the prepared Sophora japonica looper attractant with a mass ratio of attractant to water of 1:20. Tie a layer of straw mat at the bottom of the tree trunk, 1 cm thick and 50 cm long, and spray the diluted Sophora japonica looper attractant on the straw mat. The spraying amount for each tree is 3 kg, and spray once every 10 days.

[0056] (2) Loosen the soil in the area where Sophora japonica trees are planted, and release chickens in the control area to control Sophora japonica loopers at a density of 2 chickens per 5 trees.

[0057] Comparative Example 1: Prevention and Control of Sophora japonica Looper

[0058] Compared with Example 2, this comparative example is different in that the raw materials used in the preparation of the Sophora japonica looper attractant in Comparative Example 1 lack animal sponges, and the remaining steps and raw materials are the same. The control process is as follows:

[0059] Preparation of Sophora japonica geometrid attractant:

[0060] (1) Grind 1.8 kg of nandina domestica roots into powder, pass through a 200-mesh sieve, extract with 18 kg of 60 wt% ethanol, and centrifuge to obtain an extract. Evaporate and concentrate the extract to 0.5 times the original total mass to obtain nandina domestica concentrate;

[0061] (2) 1.3 kg of shrimp shells and 1.5 kg of glycerol were placed in 1.3 kg of 24 mol / L sodium hydroxide solution and stirred and mixed. The mixture was heated while stirring. After heating to 130 °C, the temperature was kept constant for 8 hours. After the reaction was completed, the precipitate was filtered to obtain a precipitate. The precipitate was washed and dried to obtain reactant A.

[0062] (3) The reactant A, 1.8 kg of straw juice and 7.5 kg of water were mixed evenly to form a uniform and stable suspension. 0.9 kg of citrus peel extract, nandina domestica concentrate and 0.5 kg of catechin were added to the suspension and ultrasonicated at 450 W for 32 min. The suspension was then reacted in a water bath at 45 ° C for 1.5 h. The suspension was centrifuged at 3200 r / min for 15 min to obtain a precipitate. The obtained precipitate was freeze-dried at -20 ° C for 11 h. After the precipitate was stabilized, 0.3 kg of water and 0.3 kg of sodium alginate were added and stirred evenly to obtain a Sophora japonica looper attractant.

[0063] Prevention and control steps: same as Example 2.

[0064] Comparative Example 2: Prevention and Control of Sophora japonica Looper

[0065] Compared with Example 2, this comparative example is different in that the raw materials used in the preparation of the Sophora japonica looper attractant in Comparative Example 2 lack Nandina domestica root, and the remaining steps and raw materials are the same. The control process is as follows:

[0066] Preparation of Sophora japonica geometrid attractant:

[0067] (1) 2.9 kg of animal sponge was dried in the sun and ground into powder, and passed through a 100-mesh sieve to obtain animal sponge powder;

[0068] (2) 1.3 kg of shrimp shells and 1.5 kg of glycerol were placed in 1.3 kg of 24 mol / L sodium hydroxide solution and stirred and mixed. The mixture was heated while stirring. After heating to 130 °C, the temperature was kept constant for 8 hours. After the reaction was completed, the precipitate was filtered to obtain a precipitate. The precipitate was washed and dried to obtain reactant A.

[0069] (3) The animal sponge powder, reactant A, 1.8 kg of straw juice and 7.5 kg of water were mixed evenly to form a uniform and stable suspension. 0.9 kg of citrus peel extract and 0.5 kg of catechin were added to the suspension and ultrasonicated at 450 W for 32 min. The suspension was then reacted in a water bath at 45 ° C for 1.5 h. The suspension was centrifuged at 3200 r / min for 15 min to obtain a precipitate. The obtained precipitate was freeze-dried at -20 ° C for 11 h. After the precipitate stabilized, 0.3 kg of water and 0.3 kg of sodium alginate were added and stirred evenly to obtain a Sophora japonica looper attractant.

[0070] Prevention and control steps: same as Example 2.

[0071] Comparative Example 3: Prevention and Control of Sophora japonica Looper

[0072] Compared with Example 2, the difference between this comparative example and Example 2 is that the raw materials used in step (3) of the comparative example 3 when preparing the Sophora japonica looper attractant lack catechins, and the remaining steps and raw materials used are the same. The control process is as follows:

[0073] Preparation of Sophora japonica geometrid attractant:

[0074] (1) 2.9 kg of animal sponges were dried in the sun and ground into powder, and the powder was passed through a 100-mesh sieve to obtain animal sponge powder; 1.8 kg of nandina domestica roots were ground into powder, passed through a 200-mesh sieve, and extracted with 18 kg of 60 wt% ethanol and centrifuged to obtain an extract, which was evaporated and concentrated to 0.5 times the original total mass to obtain nandina domestica concentrate;

[0075] (2) 1.3 kg of shrimp shells and 1.5 kg of glycerol were placed in 1.3 kg of 24 mol / L sodium hydroxide solution and stirred and mixed. The mixture was heated while stirring. After heating to 130 °C, the temperature was kept constant for 8 hours. After the reaction was completed, the precipitate was filtered to obtain a precipitate. The precipitate was washed and dried to obtain reactant A.

[0076] (3) The animal sponge powder, reactant A, 1.8 kg of straw juice and 7.5 kg of water were mixed evenly to form a uniform and stable suspension. 0.9 kg of citrus peel extract and nandina domestica concentrate were added to the suspension and ultrasonicated at 450 W for 32 min. The suspension was then reacted in a water bath at 45 ° C for 1.5 h. The suspension was centrifuged at 3200 r / min for 15 min to obtain a precipitate. The obtained precipitate was freeze-dried at -20 ° C for 11 h. After the precipitate was stabilized, 0.3 kg of water and 0.3 kg of sodium alginate were added and stirred evenly to obtain a Sophora japonica looper attractant.

[0077] Prevention and control steps: same as Example 2.

[0078] Comparative Example 4: Prevention and Control of Sophora japonica Looper

[0079] Compared with Example 2, this comparative example is different in that the raw materials used in the preparation of the Sophora japonica looper attractant in Comparative Example 4 lack straw juice, shrimp shells, and glycerin, and the remaining steps and raw materials are the same. The control process is as follows:

[0080] Preparation of Sophora japonica geometrid attractant:

[0081] (1) 2.9 kg of animal sponges were dried in the sun and ground into powder, and the powder was passed through a 100-mesh sieve to obtain animal sponge powder; 1.8 kg of nandina domestica roots were ground into powder, and the powder was passed through a 200-mesh sieve, and the powder was extracted with 18 kg of 60 wt% ethanol and centrifuged to obtain an extract; the extract was evaporated and concentrated to 0.5 times the original total mass to obtain nandina domestica concentrate;

[0082] (2) Mix the animal sponge powder, reactant A, 7.5 kg of water uniformly to form a uniform and stable suspension, add 0.9 kg of citrus peel extract, south bamboo concentrated solution, 0.5 kg of catechin to the suspension under the condition of ultrasonic 32 min at 450 W, then react in hot water at 45℃ for 1.5 h, centrifugal treatment is carried out at 3200 r / min for 15 min, and the precipitate is obtained; the obtained precipitate is freeze-dried at-20℃ for 11 h, 0.3 kg of water and 0.3 kg of sodium alginate are added after the precipitate is stabilized, and stirring is uniformly carried out, and the geometrid moth of locust tree is obtained.

[0083] Prevention step: the same as example 2.

[0084] Prevention of geometrid moth of locust tree

[0085] The difference between the present comparative example and example 2 is that the comparative example 5 does not bind the straw pad during the prevention, but directly sprays the bait on the tree body, and the rest of the steps and the used raw materials are the same, and the prevention process is as follows:

[0086] Preparation of geometrid moth bait of locust tree: the same as example 2.

[0087] Prevention step: (1) after the preparation of the geometrid moth bait of locust tree, the prepared geometrid moth bait of locust tree is diluted, the mass ratio of the bait to water is 1:18, the diluted geometrid moth bait of locust tree is sprayed on the lowermost trunk of the whole tree, the spraying amount of each tree is 2 kg, and the spraying is carried out every 10 days.

[0088] (2) the soil in the area where the locust trees are planted is loosened, and chickens are raised in the prevention area, and the density is 2 / 5, so as to prevent the geometrid moth of locust tree.

[0089] Prevention of geometrid moth of locust tree

[0090] The difference between the present comparative example and example 2 is that the comparative example 6 does not use poultry for auxiliary prevention during the prevention, and the rest of the steps and the used raw materials are the same, and the prevention process is as follows:

[0091] Preparation of geometrid moth bait of locust tree: the same as example 2.

[0092] Prevention step: after the preparation of the geometrid moth bait of locust tree, the prepared geometrid moth bait of locust tree is diluted, the mass ratio of the bait to water is 1:18, a layer of straw pad with a thickness of 1 cm and a length of 50 cm is bound at the lowermost trunk of the whole tree, and the diluted geometrid moth bait of locust tree is sprayed on the straw pad, the spraying amount of each tree is 2 kg, and the spraying is carried out every 10 days, so as to prevent the geometrid moth of locust tree.

[0093] Prevention of geometrid moth of locust tree

[0094] Compared with Example 2, the difference between this comparative example 7 and Example 2 is that the spraying amount during the control is different, and the other steps and raw materials used are the same. The control process is as follows:

[0095] Preparation of Sophora japonica looper attractant: the same as in Example 2.

[0096] Prevention and control steps: (1) After preparing the Sophora japonica looper attractant, dilute the prepared Sophora japonica looper attractant with a mass ratio of attractant to water of 1:18. Tie a layer of straw mat at the bottom of the tree trunk, 1 cm thick and 50 cm long, and spray the diluted Sophora japonica looper attractant on the straw mat. The spraying amount for each tree is 0.5 kg, and spray once every 10 days.

[0097] (2) Loosen the soil in the area where Sophora japonica is planted, and release chickens in the control area to control Sophora japonica loopers at a density of 2 chickens per 5 trees.

[0098] Comparative Example 8: Prevention and Control of Sophora japonica Looper

[0099] Compared with Example 2, this comparative example is different in that only catechin, citrus peel extract, nandina domestica root extract, animal sponge, shrimp shell and sodium alginate are used to prepare the attractant, and the specific steps are as follows:

[0100] (1) 2.9 kg of animal sponges were dried in the sun and ground into powder, and the powder was passed through a 100-mesh sieve to obtain animal sponge powder; 1.8 kg of nandina domestica roots were ground into powder, and the powder was passed through a 200-mesh sieve, and the powder was extracted with 18 kg of 60 wt% ethanol and centrifuged to obtain an extract; the extract was evaporated and concentrated to 0.5 times the original total mass to obtain nandina domestica concentrate;

[0101] (2) After 0.3 kg of water and 0.3 kg of sodium alginate are mixed evenly, 0.5 kg of catechin, 0.9 kg of citrus peel extract, nandina domestica root concentrate, animal sponge, and 1.3 kg of shrimp shell are added, and then ultrasonicated at 450 W for 32 minutes. After mixing evenly, the attractant for Sophora japonica looper is obtained.

[0102] Prevention and control steps: same as Example 2.

[0103] experiment:

[0104] The experimental site was selected in Liuyuan Village, Central Village, Chengguan Street Office, Luonan County, Shangluo City. In 2021, Sophora japonica trees infected with Sophora japonica loopers were subjected to various insect instar control experiments, using the control methods of Example 2 and Comparative Examples 1-8 for control. 30 trees were selected in each group, and the control experiments of the first-generation larvae, 1st instar, 2nd instar, and 3rd instar were carried out respectively. 10 Sophora japonica trees were selected for observation at each instar, with three replicates. The average insect population was counted before control, and the control effect was investigated 20 days after control.

[0105] Table 1

[0106]

[0107] From the analysis of Table 1, we can see that:

[0108] 1. From the overall trend, the control effect of each group was the best in the 1st instar larval stage, and then decreased successively. The insect population reduction rate of Example 2 was 100% in the 1st instar larval stage, decreased by 1.2% in the 2nd instar larval stage, and decreased to 97.4% in the 3rd instar larval stage. However, it is not difficult to see from the data of each group that Example 2 not only had the best control effect in the 1st to 3rd instar larval stages, but also compared the control effect in the 3rd instar larval stage with the control effect in the 1st instar larval stage, the degree of control effect of Example 2 was much less than that of the other groups, indicating that the present invention is applicable to the longer growth period of Sophora japonica looper, suitable for control of all instar stages, with a longer action period and better control effect.

[0109] 2. Comparative Examples 1, 2, 3 and 4 are compared with Example 2, except that only the attractant ingredients are changed. The 20-day population decline rate of Comparative Example 1 at 1st, 2nd and 3rd instars is 10.2%, 16.1% and 20.3% lower than that of Example 2, respectively. The control effect of Comparative Example 2 is worse than that of Example 2. The 20-day population decline rate at 1st, 2nd and 3rd instars is 12.9%, 16.5% and 23.4% lower than that of Example 2. This is because compared with Example 2, no animal sponges or Nandina domestica roots were added to the attractants for Sophora japonica loopers in Comparative Examples 1 and 2 during the control process. Therefore, the control effect is the worst, the attractant dosage required to kill the Sophora japonica loopers is increased, and the control effect is poor.

[0110] 3. The 20-day insect population decline rate of Comparative Example 3 at the age of 1, 2 and 3 was 2.6%, 6.9% and 16.2% lower than that of Example 2. This is because compared with Example 2, no catechin was added to the Sophora japonica looper attractant during the prevention and control process of Comparative Example 3. The 20-day insect population decline rate of Comparative Example 4 at the age of 1, 2 and 3 was 9.2%, 14.4% and 20.9% lower than that of Example 2. This is because compared with Example 2, the straw juice added on the bundled straw mat has a mixed smell that the Sophora japonica looper likes, which induces the Sophora japonica looper to eat the attractant, and the shrimp shell therein can effectively increase the food intake of the Sophora japonica looper, so that the dosage in the body reaches a lethal dose.

[0111] 4. Compared with Example 2, Comparative Example 5 did not use a straw mat, resulting in decreased adhesion of the agent and poor control effectiveness. The spraying amount in Comparative Example 7 was too small, and Comparative Example 6 did not utilize poultry for control. When the drug had a greater impact on the first-instar larvae of the Sophora japonica looper, the insect population reduction rate was high. The insect population reduction rate increased sharply in the later stages because the attractant could not immediately kill some Sophora japonica loopers in the later stages. The Sophora japonica loopers in Example 2 could be killed by poultry after burrowing into the soil, thus cooperating with the attractant to achieve a good control effect.

[0112] 5. The 20-day insect population decline rate of Comparative Example 8 at the 1st, 2nd and 3rd instars was 8.3%, 12.9% and 25.8% lower than that of Example 2, respectively. This is because compared with the steps for preparing the attractant in Example 2, Comparative Example 8 only simply mixed the raw materials during the preparation process, and the obtained product was not stable enough and was easily decomposed or deteriorated, resulting in poor insecticidal effect.

[0113] The above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that the technical solutions of the present invention may be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, and such modifications or equivalents shall be encompassed by the claims of the present invention. Any techniques, shapes, and structures not described in detail herein are well known.

Claims

1. A method for preventing and controlling Sophora japonica looper, characterized in that: The prevention and control methods are specifically as follows: (1) Tie a layer of straw mat at the bottom of the tree trunk and spray the straw mat with Sophora japonica looper attractant; (2) Loosen the soil in areas where Sophora japonica trees are planted, and release poultry in the control area to control Sophora japonica loopers; The sophora japonica looper attractant comprises the following raw materials: 0.6-1.1 parts by mass of citrus peel extract, 0.3-0.8 parts by mass of catechins, 1.4-2.2 parts by mass of straw juice, 0.2-0.5 parts by mass of sodium alginate, 2.4-3.4 parts by mass of animal sponges, 1.2-2.3 parts by mass of nandina domestica roots, 1.2-1.4 parts by mass of shrimp shells, and 1.1-2 parts by mass of glycerin.

2. A method for controlling Sophora japonica looper according to claim 1, characterized in that, The Sophora japonica looper attractant needs to be diluted before spraying, and the mass ratio of the Sophora japonica looper attractant to water is 1: (15-20).

3. A method for controlling Sophora japonica looper according to claim 2, characterized in that, The spraying amount of the Sophora japonica looper attractant is 1-3 kg / tree.

4. A method for controlling Sophora japonica looper according to claim 3, characterized in that: The preparation method of the described Sophora japonica looper attractant is as follows: (1) drying an animal sponge and grinding it into powder to obtain animal sponge powder; grinding nandina domestica roots into powder, extracting and centrifuging to obtain an extract, and evaporating and concentrating the extract to obtain nandina domestica concentrate; (2) Put the shrimp shells and glycerol into a 24 mol / L sodium hydroxide solution and stir and mix them. Heat while stirring. After heating to 130°C, keep the constant temperature to react for 8 hours. After the reaction is completed, filter to obtain a precipitate. Wash the precipitate and dry it to obtain reactant A. (3) Weigh animal sponge powder, reactant A, straw juice and water and mix them evenly to obtain a suspension. Add citrus peel extract, nandina domestica concentrate and catechin to the suspension, ultrasonicate at 400-500W for 25-38min, then react in a water bath at 40-50℃ hot water for 0.5-2h, centrifuge at 3000-3500r / min for 10-20min to obtain a precipitate. Freeze-dry the obtained precipitate, add water and sodium alginate and stir evenly to obtain a Sophora japonica looper attractant.

5. A method for controlling Sophora japonica looper according to claim 4, characterized in that, The extraction method of the citrus peel extract is as follows: Weigh citrus peel, add ethanol to soak, reflux extract twice, the extraction time is 2 hours respectively, and the reflux extracts obtained twice are combined to obtain citrus peel extract.

6. A method for controlling Sophora japonica looper according to claim 5, characterized in that: In the preparation method of the Sophora japonica looper attractant, the freeze-drying temperature of step (3) is -20°C and the time is 10-12 hours.

7. A method for controlling Sophora japonica looper according to claim 6, characterized in that: The poultry is one or more of chickens, ducks and pigeons.

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