A method for controlling olethrus aonidiella

Abstract

This invention provides a method for controlling the olive psyllid, belonging to the field of olive cultivation technology. The method includes the following steps: S1: Applying organic fertilizer, superphosphate compound fertilizer, urea, and ammonium bicarbonate to the soil to promote the growth of new shoots and leaves; S2: Collecting adult psyllids, eggs, larvae, or pupae of natural enemies of the psyllid manually and releasing them to fully utilize natural control; simultaneously, spraying with highly effective and low-toxicity pesticides that have low toxicity to natural enemies; S3: Checking for pests each time new shoots emerge and spraying with pesticides, namely acetamiprid wettable powder, milbemycin, and spirotetramat; S4: Winter orchard cleanup. This invention, by spraying acetamiprid wettable powder, milbemycin, and spirotetramat during the control of the olive psyllid, achieves a synergistic effect, synergistically improving the control efficacy of the olive psyllid.

Description

Technical Field

[0001] This invention belongs to the field of olive cultivation technology, and specifically relates to a method for controlling olive star-shaped psyllids. Background Technology

[0002] Olives are a famous subtropical specialty fruit tree. They have been cultivated in China for over 2000 years, with widespread cultivation in Guangdong and Fujian provinces. The olive drupe is oval to ovate, ripening from October to November, turning yellowish-green when ripe. Olives have various medicinal properties, including quenching thirst, relieving indigestion, moistening the lungs and resolving phlegm, disinfecting and stopping diarrhea, and aiding weight loss. Olives can be processed into various preserved fruits or eaten raw. However, olives are susceptible to pests and diseases during cultivation. Major diseases include anthracnose and sooty mold, while major pests include psyllids, scale insects, leafrollers, and longhorn beetles. Anthracnose primarily affects young leaves, branches, and fruits, causing severe defoliation, flower drop, and fruit drop. Sooty mold is mainly caused by secretions from scale insects, whiteflies, and aphids, primarily affecting leaves and fruits. Psyllids damage new shoots and leaves, sucking sap and causing shoot withering; large infestations lead to defoliation and weaken the tree. Scale insects feed on tree sap as nymphs, causing leaf drop, shoot dieback, weakened tree vigor, reduced yield, and lower fruit quality. Leafrollers mainly damage young leaves and buds, causing flower and fruit drop. Longhorn beetle larvae bore into branches and trunks, while adults feed on the bark of tender branches, inhibiting plant growth and, in severe cases, causing the entire plant to die.

[0003] Chinese patent application document "A method for controlling psyllid pests using the southern flower bug (application number: 202211615121.8)" describes an invention that releases commercially available southern flower bug products through a waterproof device during the tree's budding period each year. The device contains southern flower bug eggs, 1st to 5th instar nymphs, and one or more adult stages to control psyllid species that can cause significant damage to plants, such as the citrus psyllid and the olive psyllid. However, this invention lacks specificity in controlling the olive psyllid, and its effectiveness in controlling this pest needs improvement. Summary of the Invention

[0004] This invention provides a method for controlling olive psyllids, which addresses the problem of improving the control effect of olive psyllids by optimizing the process, formula, and method, based on the Chinese patent document "A method for controlling psyllid pests using southern small flower bug (application number: 202211615121.8)".

[0005] To achieve the above objectives, the technical solution of the present invention is:

[0006] A method for controlling the olive star psyllid includes the following steps:

[0007] S1: Reasonable fertilization: Improve soil fertility by deep plowing and soil improvement, and apply organic fertilizer, superphosphate compound fertilizer, urea and ammonium bicarbonate to the soil to promote the growth of new shoots and leaves; remove sporadic new shoots and leaves to avoid damage by psyllids, and apply concentrated top dressing to the leaves before the shoots emerge.

[0008] S2: Protect and utilize natural enemies: Collect adult, egg, larva, or pupae of natural enemies of the star-shaped psyllid by hand and release them in a concentrated manner to give full play to the natural control role; at the same time, select highly effective and low-toxicity pesticides with low toxicity to natural enemies for spraying control.

[0009] S3: Spraying pesticides: During the period from March to October, check for insect infestations each time new shoots emerge and spray control agents, namely acetamiprid wettable powder, milbemycin, and spirotetramat;

[0010] S4: Winter Orchard Cleanup: In winter, prune winter shoots and diseased branches, remove weeds from the field and burn them, combine with deep plowing and earthing up, and spray with 8-15 times diluted pine resin mixture; combine with plowing and earthing up, and at the same time control the growth of winter shoots, eliminate overwintering insect sources, and reduce the overwintering population of olive psyllids.

[0011] Preferably, in step S2, when spraying the pesticide, leave one olive tree unsprayed for every 8-9 trees to provide a habitat for natural enemies, and then spray again after 5-10 days.

[0012] Preferably, the natural enemies artificially collected in step S2 include black-shouldered green blind crickets and predatory crickets, which are released at the early stages of spring, summer, and autumn shoot growth.

[0013] Preferably, the number of natural enemies released is 600-1000 per plant.

[0014] Preferably, in step S3, the insect population is checked when the spring, summer, and autumn shoots have grown to 2-4 cm in length and the average number of single-leaf olive star-shaped psyllid nymphs reaches 6-10. Spraying is then carried out to protect the shoots. Spraying is done once every 6-8 days, for a total of 3-4 times.

[0015] Preferably, potassium dihydrogen phosphate and sulfur boron fertilizer can be added to the foliar fertilizer each time the pesticide is sprayed to promote the aging and maturation of new shoots.

[0016] Preferably, the dosage of the control agent in step S3 is (1-28):(10-45):(5-32) of acetamiprid wettable powder, milbemycin, and spirotetramat.

[0017] Preferably, in step S3, the dosage of the control agent is acetamiprid wettable powder, milbemycin, and spirotetramat in a ratio of 22:32:15.

[0018] Preferably, in step S3, to reduce the occurrence of drug resistance, the pesticides acetamiprid wettable powder, milbemycin, and spirotetramat are sprayed in an alternating manner.

[0019] Preferably, in step S4, after spraying 8-15 times diluted pine resin mixture, a Bordeaux mixture of 160-200 times diluted solution is sprayed after an interval of 20 days.

[0020] The beneficial effects of this invention are:

[0021] (1) As can be seen from the data of Example 1 and Comparative Examples 1-4, spraying acetamiprid wettable powder, milbemycin and spirotetramat in the control of olive psyllids has a synergistic promoting effect and synergistically improves the control effect of olive psyllids. This is because: acetamiprid wettable powder is a pyridine compound. After spraying, it can effectively eliminate the resistance in the pests. It has a strong penetrating effect. When applied to dense crop leaves, it can remove pests on the back of the leaves and in hidden places. It has good fast-acting and long-lasting effects. After use, it can quickly eliminate the damage caused by pests and control the occurrence of pests for a relatively long period of time. Milbemycin exhibits high control efficacy against various mites. Most of its 20 components possess broad-spectrum control activity against agricultural pests, such as aphids, mites, yellow-brown tent caterpillars, intestinal parasites, and other parasites that harm crops and livestock. It is highly effective against pests and diseases, requires low dosage, is safe for humans and animals, does not pollute the environment, kills only the pests without harming natural enemies, and is unlikely to induce resistance. It can be used in combination or rotational applications to control resistance-prone insecticides. It is currently a promising broad-spectrum, highly effective, novel biological insecticide without cross-resistance. Spirotetramat possesses unique characteristics and is one of the modern insecticides with bidirectional systemic translocation properties. This compound can move upwards and downwards throughout the plant, reaching pests on leaves, bark, and fruit tree bark. This unique systemic property protects new stems, leaves, and roots, preventing the growth of insect eggs and larvae. Furthermore, it has a long residual effect, providing effective control for up to 8 weeks.

[0022] (2) The patent document cited in the background technology, "A method for controlling psyllid pests using the southern flower bug (application number: 202211615121.8)," mainly involves releasing commercially available southern flower bug products through a waterproof device during the tree's budding period each year. The device contains southern flower bug eggs, 1st to 5th instar nymphs, and one or more of their adult stages to control psyllid species that can cause significant damage to plants, such as citrus psyllid and olive star-shaped psyllid. However, there is a problem that the effectiveness of this invention in controlling olive star-shaped psyllid needs to be improved. To address the aforementioned technical problems, this invention further optimizes and improves the composition and dosage of the control agent. Through numerous experimental studies, it has been found that spraying acetamiprid wettable powder, milbemycin, and spirotetramat has a synergistic effect in controlling the olive psyllid. This synergistic effect enhances the control efficacy of the olive psyllid. Acetamiprid wettable powder has a strong penetrating effect; when applied to dense crop leaves, it can eliminate pests on the underside of leaves and in hidden areas. Spirotetramat has bidirectional systemic properties, effectively clearing pests from the surface of olive branches and leaves. Milbemycin has broad-spectrum activity against agricultural pests and a strong effect, thereby improving the control efficacy of the olive psyllid and solving the technical problems mentioned in the background art documents, producing unexpected results. Detailed Implementation

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0025] In the following embodiments, the method for controlling the olive star psyllid includes the following steps:

[0026] S1: Reasonable fertilization: Improve soil fertility by deep plowing and soil improvement, and apply organic fertilizer, superphosphate compound fertilizer, urea and ammonium bicarbonate to the soil to promote the growth of new shoots and leaves; remove sporadic new shoots and leaves to avoid damage by psyllids, and apply concentrated top dressing to the leaves before the shoots emerge.

[0027] S2: Protection and utilization of natural enemies: Adults, eggs, larvae, or pupae of natural enemies of the star-shaped psyllid are collected artificially and released in a concentrated manner. These natural enemies include the black-shouldered green blind beetle and the predatory beetle. They are released at the early stage of spring, summer, and autumn shoot growth. The number of natural enemies released is 600-1000 per tree to give full play to the natural control effect. At the same time, highly effective and low-toxicity pesticides with low toxicity to natural enemies are selected for spraying. When spraying pesticides, leave 1 out of every 8-9 olive trees unsprayed to provide a habitat for natural enemies. The remaining trees will be sprayed after 5-10 days.

[0028] S3: Pesticide application: From March to October, check for insect infestations each time new shoots emerge. When spring, summer, and autumn shoots are 2-4 cm long and the average number of single-leaf olive leaf psyllid nymphs reaches 6-10, spray to protect the shoots. Spray once every 6-8 days, for a total of 3-4 times. Each time you spray, you can add foliar fertilizer potassium dihydrogen phosphate and sulfur boron fertilizer to promote the aging and maturation of new shoots. The control agents are acetamiprid wettable powder, milbemycin, and spirotetramat, with a dosage of (1-28):(10-45):(5-32). When spraying in spring, summer, and autumn, the first spray should be a compound agent of acetamiprid wettable powder, milbemycin, and spirotetramat. To reduce the occurrence of resistance, after the second spray, acetamiprid wettable powder, milbemycin, and spirotetramat should be sprayed in rotation.

[0029] S4: Winter Orchard Cleanup: In winter, prune winter shoots and diseased branches, remove weeds from the field and burn them, combine with deep plowing and earthing up, and spray with 8-15 times diluted pine resin mixture. Then, after an interval of 20 days, spray with 160-200 times diluted Bordeaux mixture. Combine plowing and earthing up to control the growth of winter shoots, eliminate overwintering insect sources, and reduce the overwintering population of olive psyllids.

[0030] The following describes the process through more specific embodiments.

[0031] Example 1

[0032] A method for controlling the olive star psyllid includes the following steps:

[0033] S1: Reasonable fertilization: Improve soil fertility by deep plowing and soil improvement, and apply organic fertilizer, superphosphate compound fertilizer, urea and ammonium bicarbonate to the soil to promote the growth of new shoots and leaves; remove sporadic new shoots and leaves to avoid damage by psyllids, and apply concentrated top dressing to the leaves before the shoots emerge.

[0034] S2: Protection and utilization of natural enemies: Adults, eggs, larvae, or pupae of natural enemies of the star-shaped psyllid are collected artificially and released in a concentrated manner. These natural enemies include the black-shouldered green blind beetle and the predatory beetle. They are released at the early stage of spring, summer, and autumn shoot growth. The number of natural enemies released is 800 per tree, giving full play to the natural control effect. At the same time, highly effective and low-toxicity pesticides with low toxicity to natural enemies are selected for spraying. When spraying pesticides, one out of every eight olive trees is left unsprayed to provide a habitat for natural enemies. The remaining trees are sprayed after 8 days.

[0035] S3: Pesticide application: From March to October, check for pests each time new shoots emerge. When spring, summer, and autumn shoots reach 2cm in length and the average number of olive leaf psyllid nymphs reaches 8, spray to protect the shoots. Spray once every 8 days, for a total of 4 sprays. Each time you spray, you can add foliar fertilizer potassium dihydrogen phosphate and sulfur-based boron fertilizer to promote the aging and maturation of new shoots. The control agents are acetamiprid wettable powder, milbemycin, and spirotetramat, in a ratio of 22:32:15. When spraying in spring, summer, and autumn, the first spray should be a compound of acetamiprid wettable powder, milbemycin, and spirotetramat. To reduce the occurrence of resistance, after the second spray, acetamiprid wettable powder, milbemycin, and spirotetramat should be sprayed alternately.

[0036] S4: Winter Orchard Cleanup: In winter, prune winter shoots and diseased branches, remove weeds from the field and burn them, combine with deep plowing and earthing up, and spray with 15 times diluted pine resin mixture. Then, after an interval of 20 days, spray with 160 times diluted Bordeaux mixture. Combine plowing and earthing up to control the growth of winter shoots, eliminate overwintering insect sources, and reduce the overwintering population of olive psyllids.

[0037] Example 2

[0038] A method for controlling the olive star psyllid includes the following steps:

[0039] S1: Reasonable fertilization: Improve soil fertility by deep plowing and soil improvement, and apply organic fertilizer, superphosphate compound fertilizer, urea and ammonium bicarbonate to the soil to promote the growth of new shoots and leaves; remove sporadic new shoots and leaves to avoid damage by psyllids, and apply concentrated top dressing to the leaves before the shoots emerge.

[0040] S2: Protection and utilization of natural enemies: Adults, eggs, larvae or pupae of natural enemies of the star-shaped psyllid are collected artificially and released in a concentrated manner. The natural enemies include the black-shouldered green blind cricket and the predatory cricket. They are released at the early stage of spring shoot, summer shoot and autumn shoot budding. The number of natural enemies released is 1000 per tree, giving full play to the natural control effect. At the same time, highly effective and low-toxicity pesticides with low toxicity to natural enemies are selected for spraying. When spraying pesticides, leave 1 out of every 9 olive trees unsprayed to provide a habitat for natural enemies. The trees will be re-sprayed after 10 days.

[0041] S3: Pesticide application: From March to October, check for pests each time new shoots emerge. When spring, summer, and autumn shoots reach 3cm in length and the average number of olive leaf psyllid nymphs reaches 10, spray to protect the shoots. Spray once every 6 days, for a total of 4 sprays. Each time you spray, you can add foliar fertilizer potassium dihydrogen phosphate and sulfur-based boron fertilizer to promote the aging and maturation of new shoots. The control agents are acetamiprid wettable powder, milbemycin, and spirotetramat, in a ratio of 28:45:32. When spraying in spring, summer, and autumn, the first spray should be a compound of acetamiprid wettable powder, milbemycin, and spirotetramat. To reduce the occurrence of resistance, after the second spray, acetamiprid wettable powder, milbemycin, and spirotetramat should be sprayed alternately.

[0042] S4: Winter Orchard Cleanup: In winter, prune winter shoots and diseased branches, remove weeds from the field and burn them, combine with deep plowing and earthing up, and spray with 8 times diluted pine resin mixture. Then, after an interval of 20 days, spray with 180 times diluted Bordeaux mixture. Combine plowing and earthing up to control the growth of winter shoots, eliminate overwintering insect sources, and reduce the overwintering population of olive psyllids.

[0043] Example 3

[0044] A method for controlling the olive star psyllid includes the following steps:

[0045] S1: Reasonable fertilization: Improve soil fertility by deep plowing and soil improvement, and apply organic fertilizer, superphosphate compound fertilizer, urea and ammonium bicarbonate to the soil to promote the growth of new shoots and leaves; remove sporadic new shoots and leaves to avoid damage by psyllids, and apply concentrated top dressing to the leaves before the shoots emerge.

[0046] S2: Protection and utilization of natural enemies: Adults, eggs, larvae or pupae of natural enemies of the star-shaped psyllid are collected artificially and released in a concentrated manner. These natural enemies include the black-shouldered green blind beetle and the predatory beetle. They are released at the early stage of spring shoot, summer shoot and autumn shoot budding. The number of natural enemies released is 600 per tree, giving full play to the natural control effect. At the same time, highly effective and low-toxicity pesticides with low toxicity to natural enemies are selected for spraying. When spraying pesticides, leave 1 out of every 8 olive trees unsprayed to provide a habitat for natural enemies. The trees will be re-sprayed after 5 days.

[0047] S3: Pesticide application: From March to October, check for pests each time new shoots emerge. When spring, summer, and autumn shoots reach 4cm in length and the average number of olive leaf psyllid nymphs reaches 6, spray to protect the shoots. Spray once every 7 days, for a total of 4 sprays. Each time you spray, you can add foliar fertilizer potassium dihydrogen phosphate and sulfur-based boron fertilizer to promote the aging and maturation of new shoots. The control agents are acetamiprid wettable powder, milbemycin, and spirotetramat, in a ratio of 1:10:5. When spraying in spring, summer, and autumn, the first spray should be a compound of acetamiprid wettable powder, milbemycin, and spirotetramat. To reduce the occurrence of resistance, after the second spray, acetamiprid wettable powder, milbemycin, and spirotetramat should be sprayed alternately.

[0048] S4: Winter Orchard Cleanup: In winter, prune winter shoots and diseased branches, remove weeds from the field and burn them, combine with deep plowing and earthing up, and spray with 11 times diluted pine resin mixture. Then, after 20 days, spray with 200 times diluted Bordeaux mixture. Combine plowing and earthing up to control the growth of winter shoots, eliminate overwintering insect sources, and reduce the overwintering population of olive psyllids.

[0049] Example 4

[0050] A method for controlling the olive star psyllid includes the following steps:

[0051] S1: Reasonable fertilization: Improve soil fertility by deep plowing and soil improvement, and apply organic fertilizer, superphosphate compound fertilizer, urea and ammonium bicarbonate to the soil to promote the growth of new shoots and leaves; remove sporadic new shoots and leaves to avoid damage by psyllids, and apply concentrated top dressing to the leaves before the shoots emerge.

[0052] S2: Protection and utilization of natural enemies: Adults, eggs, larvae, or pupae of natural enemies of the star-shaped psyllid are collected artificially and released in a concentrated manner. These natural enemies include the black-shouldered green blind beetle and the predatory beetle. They are released at the early stage of spring, summer, and autumn shoot growth. The number of natural enemies released is 900 per tree, giving full play to the natural control effect. At the same time, highly effective and low-toxicity pesticides with low toxicity to natural enemies are selected for spraying. When spraying pesticides, one out of every nine olive trees is left unsprayed to provide a habitat for natural enemies. The remaining trees are sprayed after 9 days.

[0053] S3: Pesticide application: From March to October, check for pests each time new shoots emerge. When spring, summer, and autumn shoots reach 4cm in length and the average number of olive leaf psyllid nymphs reaches 7, spray to protect the shoots. Spray once every 7 days, for a total of 3 sprays. Each time you spray, you can add foliar fertilizer potassium dihydrogen phosphate and sulfur-based boron fertilizer to promote the aging and maturation of new shoots. The control agents are acetamiprid wettable powder, milbemycin, and spirotetramat, in a ratio of 20:15:24. When spraying in spring, summer, and autumn, the first spray should be a compound of acetamiprid wettable powder, milbemycin, and spirotetramat. To reduce the occurrence of resistance, after the second spray, acetamiprid wettable powder, milbemycin, and spirotetramat should be sprayed alternately.

[0054] S4: Winter Orchard Cleanup: In winter, prune winter shoots and diseased branches, remove weeds from the field and burn them, combine with deep plowing and earthing up, and spray with 10 times diluted pine resin mixture. Then, after an interval of 20 days, spray with 190 times diluted Bordeaux mixture. Combine plowing and earthing up to control the growth of winter shoots, eliminate overwintering insect sources, and reduce the overwintering population of olive psyllids.

[0055] Comparative Example 1

[0056] The method for controlling olive-spotted psyllid is basically the same as that in Example 1, except that when spraying pesticides in spring, summer and autumn, acetamiprid wettable powder, milbemycin and spirotetramat are sprayed in rotation; that is, the compound pesticide of acetamiprid wettable powder, milbemycin and spirotetramat is not sprayed.

[0057] Comparative Example 2

[0058] The method for controlling olive-spotted psyllid is basically the same as that in Example 1, except that when spraying pesticides in spring, summer and autumn, the first spray is a compound pesticide of milbemycin and spirotetramat; in order to reduce the occurrence of resistance, milbemycin and spirotetramat are sprayed alternately after the second spray; that is, the pesticide does not contain acetamiprid wettable powder.

[0059] Comparative Example 3

[0060] The method for controlling olive-spotted psyllid is basically the same as that in Example 1, except that when spraying pesticides in spring, summer and autumn, the first spray is a compound pesticide of acetamiprid wettable powder and spirotetramat; to reduce the occurrence of resistance, the second and subsequent sprays of acetamiprid wettable powder and spirotetramat are sprayed alternately; that is, the pesticide does not contain milbemycin.

[0061] Comparative Example 4

[0062] The method for controlling olive-spotted psyllid is basically the same as that in Example 1, except that when spraying pesticides in spring, summer and autumn, the first spray is a combination of acetamiprid wettable powder and milbemycin; to reduce the occurrence of resistance, the second and subsequent sprays of acetamiprid wettable powder and milbemycin are sprayed alternately; that is, the pesticide does not contain spirotetramat.

[0063] Comparative Example 5

[0064] The method described in Example 1 of the Chinese patent application document "A method for controlling psyllid pests using the southern small flower bug (application number: 202211615121.8)" was used to control the olive star psyllid.

[0065] The control of olive psyllids was carried out according to the methods described in Examples 1-4 and Comparative Examples 1-5. The spraying concentration of each control agent was prepared according to the reasonable spraying concentration of each agent. Spraying was carried out when the olive new shoots were 2-4 cm long and the psyllids were in the peak egg hatching period. The number of insects on the leaves was recorded at 3, 7, 15 and 30 days after spraying. The results are shown in the table below.

[0066]

[0067] As can be seen from the table above: (1) As can be seen from the data of Examples 1-4 and Comparative Example 5, the control effect of Olive Star Psyllid in Examples 1-4 is significantly higher than that in Comparative Example 5, and Example 1 is the best example.

[0068] (2) As can be seen from the data of Example 1 and Comparative Examples 1-4, spraying acetamiprid wettable powder, milbemycin and spirotetramat in the control of olive psyllids has a synergistic promoting effect and synergistically improves the control effect of olive psyllids. This is because: acetamiprid wettable powder is a pyridine compound, which can effectively eliminate the resistance of pests after spraying. It has a strong penetrating effect. When applied to dense crop leaves, it can eliminate pests on the back of leaves and in hidden places. It has good fast-acting and long-lasting effects. After use, it can quickly eliminate the damage caused by pests and control the occurrence of pests for a relatively long period of time. Milbemycin exhibits high control efficacy against various mites. Most of its 20 components possess broad-spectrum control activity against agricultural pests, such as aphids, mites, yellow-brown tent caterpillars, intestinal parasites, and other parasites that harm crops and livestock. It is highly effective against pests and diseases, requires low dosage, is safe for humans and animals, does not pollute the environment, kills only the pests without harming natural enemies, and is unlikely to induce resistance. It can be used in combination or rotational applications to control resistance-prone insecticides. It is currently a promising broad-spectrum, highly effective, novel, and cross-resistance-free biological insecticide. Spirotetramat possesses unique characteristics and is one of the modern insecticides with bidirectional systemic translocation properties. This compound can move upwards and downwards throughout the plant, reaching the leaves and bark, thereby controlling pests on fruit tree bark. This unique systemic property protects new stems, leaves, and roots, preventing the growth of insect eggs and larvae, and its long-lasting effect provides effective control for up to 8 weeks. The control effects of olive-spotted psyllids in Examples 1-4 and Comparative Examples 2-4 show that the combined use of acetamiprid wettable powder, milbemycin, and spirotetramat can achieve a synergistic effect. In particular, the synergistic effect of the ratio of acetamiprid wettable powder, milbemycin, and spirotetramat is especially obvious in Example 1.

[0069] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made using the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for controlling the olive star psyllid, characterized in that, Includes the following steps: S1: Reasonable fertilization: Improve soil fertility by deep plowing and soil improvement, and apply organic fertilizer, superphosphate compound fertilizer, urea and ammonium bicarbonate to the soil to promote the growth of new shoots and leaves; remove sporadic new shoots and leaves to avoid damage by psyllids, and apply concentrated top dressing to the leaves before the shoots emerge. S2: Protect and utilize natural enemies: Collect adult, egg, larva, or pupae of natural enemies of the star-shaped psyllid by hand and release them in a concentrated manner to give full play to the natural control role; at the same time, select highly effective and low-toxicity pesticides with low toxicity to natural enemies for spraying control. S3: Spraying pesticides: During the period from March to October, check for insect infestations each time new shoots emerge and spray control agents, namely acetamiprid wettable powder, milbemycin, and spirotetramat; S4: Winter garden cleanup: In winter, prune winter shoots and diseased branches, remove weeds from the field and burn them, combine with deep plowing and earthing up, and spray with 8-15 times diluted pine resin mixture; combine with plowing and earthing up, control the growth of winter shoots, eliminate overwintering insect sources, and reduce the overwintering population of olive psyllids. In step S2, when spraying pesticides, leave one olive tree unsprayed for every 8-9 trees to provide a habitat for natural enemies. Re-spray after 5-10 days. In step S3, the insect population is checked when the spring, summer, and autumn shoots are 2-4 cm long and the average number of nymphs of the olive star-shaped psyllid on a single leaf reaches 6-10. Spray the pesticide to protect the shoots; spray once every 6-8 days, for a total of 3-4 times. In step S3, the dosage of the control agents is (1-28): (10-45): (5-32) of acetamiprid wettable powder, milbemycin, and spirotetramat.

2. The method for controlling the olive star psyllid according to claim 1, characterized in that, The natural enemies artificially collected in step S2 include black-shouldered green blind crickets and predatory crickets, which are released at the early stages of spring, summer, and autumn shoot growth.

3. The method for controlling the olive star psyllid according to claim 2, characterized in that, The number of natural enemies released is 600-1000 per plant.

4. The method for controlling the olive star psyllid according to claim 1, characterized in that, Each time you spray pesticides, you can add foliar fertilizers such as potassium dihydrogen phosphate and sulfur-based boron fertilizer to promote the aging and maturation of new shoots.

5. The method for controlling the olive star psyllid according to claim 1, characterized in that, In step S3, the dosage of the control agent is acetamiprid wettable powder, milbemycin, and spirotetramat in a ratio of 22:32:

15.

6. The method for controlling the olive star psyllid according to claim 1 or 5, characterized in that, In step S3, to reduce the occurrence of drug resistance, the pesticides acetamiprid wettable powder, milbemycin, and spirotetramat are sprayed in rotation.

7. The method for controlling the olive star psyllid according to claim 1, characterized in that, In step S4, after spraying 8-15 times diluted pine resin mixture, a Bordeaux mixture of 160-200 times diluted solution is sprayed after an interval of 20 days.

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