Insecticide composition for preventing and treating hylocereus oryzae of jackfruit

Abstract

The invention belongs to the technical field of pesticides, and particularly relates to an insecticide composition for preventing and treating hylocereus oryzae of jackfruit. The insecticide composition for preventing and treating the jackfruit diaphania testis borer comprises an active component, and the active component is formed by compounding polyflubendiamide with spinetoram, ivermectin or guadipyr, and the active component is formed by compounding the polyflubendiamide with the spinetoram, the ivermectin or the guadipyr. When the flubendiamide is compounded with the spinetoram, the ivermectin or the guadipyr according to a certain mass ratio, the flubendiamide and the guadipyr have a synergistic effect on prevention and removal of the heortia vitessoides. Therefore, the pesticide composition provided by the invention can improve the prevention and control effect on the hylocereus flabellatus on the jack fruit, reduce the use amount of the pesticide and solve the problems of pesticide residue and environmental pressure. Meanwhile, the insecticide composition can delay the development of pest resistance to insecticide.

Description

Technical Field

[0001] The invention belongs to the technical field of pesticides, and particularly relates to an insecticide composition for preventing and controlling jackfruit yellow-winged silk borer. Background Art

[0002] Diaphania caesalis Walker is a highly destructive borer pest belonging to the family Pyralidae in the order Lepidoptera. It mainly harms tropical crops such as jackfruit, durian honey and breadfruit. On jackfruit, the adult Diaphania caesalis Walker lays eggs on the surface of the host's twigs, fruit stalks or flower buds. The larvae mainly bore into the twigs, leaf buds and fruits of jackfruit, resulting in a decrease in yield and quality. In severe cases, it can cause a yield reduction of more than 50%.

[0003] At present, spraying pesticides is an effective and convenient means to control pests such as yellow-winged silk borer on jackfruit. However, long-term use of single-ingredient pesticides can easily lead to the rapid accumulation of pest resistance, resulting in reduced efficacy of pesticides. Although increasing the spraying amount or spraying frequency of the pesticide can improve the efficacy in a short period of time, this will aggravate the accumulation of pest resistance, and will also cause excessive pesticide residues and increase environmental pressure. Compounding different insecticide active ingredients is one of the effective and convenient ways to solve the above problems, but in most cases, the compounding effect of pesticides is an additive effect, and some are even antagonistic effects. There are very few compounds that really have synergistic effects, and even if there is a synergistic effect, it is closely related to the compounding ratio, and usually only produces a synergistic effect within a specific compounding ratio range. Therefore, it is necessary to screen the compound combination.

[0004] Piperflanilide is a diamide insecticide developed by Jiangsu Yangnong subsidiary, also known as piperflanilide, with molecular formula: C 26 H 13 F 12 N2O5, CAS: 2615135-05-0, structural formula:

[0005]

[0006] Polyflubencarbamide can be regarded as a compound obtained by modifying the substituents of the benzene rings at both ends of bromofenac, so it is speculated that polyflubencarbamide, bromofenac, cyprodinil, and flubencarbamide belong to the same group of allosteric modulators of γ-aminobutyric acid (GABA)-gated chloride channels. GABA is the main inhibitory neurotransmitter in the conduction of insect nerve excitation, and allosterically inhibits the chloride channels activated by GABA, thereby causing overexcitement and convulsions, leading to the ultimate death of the target. Polyflubencarbamide can be used to control a variety of pests such as Lepidoptera, Coleoptera, Thysanoptera, Hemiptera, Homoptera, and Diptera, as well as a variety of pest mites such as Tetranychus and Gall Mites.

[0007] Prior art patent CN119096983A discloses an insecticide composition containing an amide insecticide and its application, which discloses that the co-toxicity coefficient of the compound of formula I and polyflubendiamide to rice stem borer in a mass ratio of 1:20-24:1 is greater than 120, showing a synergistic effect.

[0008] At present, there are no reports on the combination of polyflubendiamide with spinetoram, ivermectin or pyraclostrobin. Summary of the invention

[0009] The object of the present invention is to provide an insecticide composition for controlling yellow-winged silk borer on jackfruit, so as to solve the problem of long-term use of single-component insecticides to control yellow-winged silk borer and other pests on jackfruit.

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] Disclosed is an insecticide composition for controlling jackfruit yellow-winged silk borer, the insecticide composition comprising an active ingredient, wherein the active ingredient is compounded from polyflubendiamide and spinetoram, ivermectin or pentothiazolin; wherein the compounding mass ratio of polyflubendiamide to spinetoram is 1-5:8-1; the compounding mass ratio of polyflubendiamide to ivermectin is 1-15:15-1; and the compounding mass ratio of polyflubendiamide to pentothiazolin is 1-30:2-1.

[0012] Furthermore, the compounding mass ratio of polyflubendiamide to ivermectin is 1-10:5-1.

[0013] Furthermore, the insecticide composition also includes auxiliary ingredients.

[0014] Furthermore, the mass of the active ingredient accounts for 1-40% of the total mass of the insecticide composition, and the remainder is the auxiliary ingredient.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] When polyflubencarbamide is compounded with spinetoram, ivermectin or pentamectin at a certain mass ratio, a synergistic effect is shown in controlling yellow-winged silk borer. This indicates that the insecticide composition of the present invention can improve the control effect of yellow-winged silk borer on jackfruit, reduce the amount of pesticide used, and solve the problems of pesticide residues and environmental pressure. At the same time, the insecticide composition of the present invention can also delay the development of pest resistance. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is described clearly and completely below. Based on the embodiments of the present invention, all other embodiments obtained by the technicians in this field without creative work are within the scope of protection of the present invention.

[0018] 1. Indoor activity test of polyflubendiamide compound

[0019] 1.1 Test subjects

[0020] The larvae of yellow-winged silk borer were collected from the jackfruit planting base of Guangxi South Asian Tropical Agricultural Science Research Institute and raised in an artificial climate room with a photoperiod of 16L / 8D, a temperature of 26±1℃, and a relative humidity of 60±10%. The larvae were fed with fresh, clean, and pesticide-free jackfruit leaves, and the adults were fed with 5% honey water. After four generations of continuous breeding, the 2nd instar larvae were selected as the test subjects.

[0021] 1.2 Test agents

[0022] 96.4% polyflubenzuron TC, 81.2% spinetoram TC, 94% ivermectin TC, 96% pyraclostrobin TC

[0023] 1.3 Test methods

[0024] The leaf dip method was used to determine the toxicity of single agents and mixtures of polyflumizone, spinetoram, ivermectin and pyraclostrobin against the second-instar larvae of the yellow-winged silk borer (test pest).

[0025] 1.3.1 Preparation of drug solution: Dissolve the test drug in the solvent and dilute it with 0.1% Tween 80 aqueous solution to an effective single-dose stock solution of 10,000 mg / L. Set up multiple groups of mixed preparations, and dilute the single-dose stock solution and each group of mixed preparations with 0.1% Tween 80 aqueous solution to 5 mass concentration gradients.

[0026] 1.3.2 Leaf feeding: Use a hole puncher to punch a 2cm diameter leaf disc on fresh, clean, and pesticide-free jackfruit leaves, immerse them in the prepared solution for 10 seconds, take them out and dry them, and place them in a culture dish containing moist filter paper. Place multiple leaf discs of the same treatment in each dish, and inoculate 5 test pests that have been starved for 2 hours in each dish. Feed the test pests with leaf discs treated with 0.1% Tween 80 aqueous solution as a blank control. Set up 4 replicates for each mass concentration of the solution, and each replicate has 1 culture dish. Observe in an artificial climate room with a photoperiod of 16L / 8D, a temperature of 26±1℃, and a relative humidity of 60±10%.

[0027] 1.3.3 Statistical calculation: After 48 hours, check the mortality of the test insects, calculate the corrected mortality rate of each treatment, and perform regression analysis on the logarithmic value of the pesticide concentration and the corrected mortality probability value to calculate the LC of different pesticide treatments on the test pests. 50value.

[0028]

[0029] In the above formula: P--mortality rate, unit is %; K--number of dead insects, unit is head; N--total number of insects treated, unit is head.

[0030]

[0031] In the above formula: P1--corrected mortality rate, unit is %; P t --Treatment mortality rate, in %; P0--blank control mortality rate, in %.

[0032] 1.4 Evaluation of joint effects

[0033] The co-toxicity coefficient (CTC) of the mixture was calculated using the Sun Yunpei method, where CTC ≤ 80 was antagonistic, 80 < CTC < 120 was additive, and CTC ≥ 120 was synergistic. The results are shown in Tables 1-4.

[0034] Table 1 LC of single agent against 2nd instar larvae of C. fulvidraco 50 Relative toxicity index TI

[0035]

[0036] The results in Table 1 show that the LC values ​​of the four single agents of polyflubenzuron, ethyl spinetoram, ivermectin and pyraclostrobin against the second instar larvae of the yellow-winged silk moth are 50 They are 1.481mg / L, 2.963mg / L, 8.185mg / L and 6.772mg / L respectively.

[0037] Table 2 Indoor activity test results of polyflubendiamide and ethyl spinetoram against the 2nd instar larvae of yellow-winged silk borer

[0038]

[0039] As shown in Table 2, when the compounding mass ratio of polyflubendiamide to spinetoram is 1-5:8-1, the co-toxicity coefficient to the 2nd instar larvae of yellow-winged silk borer is between 120.494-193.033, which is greater than 120, showing a synergistic effect. This indicates that the compounding of polyflubendiamide and spinetoram in the present invention can improve the control effect on yellow-winged silk borer.

[0040] Table 3 Indoor activity test results of polyflubenzuron bisamide and ivermectin against the 2nd instar larvae of yellow-winged silk borer

[0041]

[0042] As shown in Table 3, when the compounding mass ratio of polyflubendiamide to ivermectin is 1-15:15-1, the co-toxicity coefficient to the 2nd instar larvae of yellow-winged silk borer is between 121.771-392.479, which is greater than 120, showing a synergistic effect; when the compounding mass ratio is 1-10:5-1, the co-toxicity coefficient of the compound combination to the 2nd instar larvae of yellow-winged silk borer is between 176.850-392.479, and the synergistic effect is obvious. It is shown that the compounding of polyflubendiamide and ivermectin in the present invention can improve the control effect of yellow-winged silk borer.

[0043] Table 4 Indoor activity test results of polyflubenzuron bisamide and pyraclostrobin against the 2nd instar larvae of yellow-winged silk borer

[0044]

[0045] As shown in Table 4, when the compounding mass ratio of polyflubendiamide to pentamethylenediamine is 1-30:2-1, the co-toxicity coefficient to the 2nd instar larvae of yellow-winged silk borer is between 124.755-194.182, which is greater than 120, showing a synergistic effect. This indicates that the compounding of polyflubendiamide and pentamethylenediamine in the present invention can improve the control effect on yellow-winged silk borer.

Claims

1. An insecticide composition for preventing and controlling jackfruit yellow-winged silk borer, characterized in that: The insecticide composition comprises an active ingredient, wherein the active ingredient is compounded with polyflubendiamide and spinetoram, ivermectin or pyraclostrobin; wherein, The composite mass ratio of polyflubenzuron bisamide to ethyl spinetoram is 1-5:8-1; The composite mass ratio of polyflubenzuron bisamide to ivermectin is 1-15:15-1; The composite mass ratio of polyflubenzuron bisamide to pentamethylenediamine is 1-30:2-1.

2. The insecticide composition according to claim 1, characterized in that The composite mass ratio of polyflubenzuron bisamide to ivermectin is 1-10:5-1.

3. The insecticide composition according to claim 1, characterized in that The insecticide composition further comprises auxiliary ingredients.

4. The insecticide composition according to claim 3, characterized in that The mass of the active ingredient accounts for 1-40% of the total mass of the insecticide composition, and the remainder is the auxiliary ingredient.

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