Insecticidal composition for preventing and treating caryopteris fig caryopteris

Abstract

The invention belongs to the technical field of pesticides, and particularly relates to an insecticidal composition for preventing and treating carica carica. The invention relates to an insecticidal composition, which is used for preventing and treating carica carica, and is prepared by compounding doramectin and guadipyr or tolfenpyrad, the mass ratio of the doramectin to the guadipyr is (1-15): (30-1); the mass ratio of the doramectin to the tolfenpyrad is (1-20): (5-1). When the doramectin and the guadipyr or the tolfenpyrad are compounded, the compounded combination shows a combined synergistic effect on the fig shells in the mass ratio ranges of (1-15): (30-1) and (1-20): (5-1), and it is indicated that the insecticidal composition can improve the control effect on the fig shells.

Description

Technical Field

[0001] The invention belongs to the technical field of pesticides, and particularly relates to an insecticide composition for preventing and controlling fig beetles. Background Art

[0002] Fig beetles will directly affect the yield and quality of figs when feeding on them, and may spread pathogenic microorganisms during the feeding process, causing figs to be attacked by fungal diseases, further reducing the yield and quality of figs. At present, in the actual production of figs, chemical pesticides are still the main control method for fig beetles, but due to the long-term and large-scale unreasonable use of a single insecticide or similar insecticides, fig beetles have developed resistance to multiple insecticides, resulting in unsatisfactory control effects of existing multiple insecticides on figs.

[0003] Doramectin is a macrolide antibiotic fermented by a genetically recombinant new strain of Streptomyces avermitilis using cyclohexanecarboxylic acid as a precursor. It belongs to the avermectin class of biological pesticides. Doramectin can interfere with neurophysiological activities and stimulate the release of γ-aminobutyric acid. The increase in the release of γ-aminobutyric acid increases the normal resting potential of postsynaptic cells, making it difficult for nerves to transmit stimulation to muscles, making it impossible for muscles to contract, resulting in paralysis of the insect body and expulsion. Spinosad has contact and stomach poisoning effects on insects, mites and nematodes, can kill pests under the epidermis, and has a long lasting effect.

[0004] Compounding different insecticidal active ingredients is one of the effective and convenient ways to develop and research new insecticides. The inventors compounded doramectin with existing insecticidal active ingredients and found that when doramectin was compounded with pyraclostrobin or tolfenpyrad, it showed a synergistic effect on fig beetles, which could improve the control effect. So far, there have been no reports on compounding doramectin with pyraclostrobin or tolfenpyrad for the prevention and control of fig beetles. Summary of the invention

[0005] The object of the present invention is to provide an insecticide composition for controlling fig beetles, so as to solve the problem that the fig beetles have developed resistance to multiple insecticides due to long-term, large-scale and unreasonable use of a single insecticide or similar insecticides, resulting in unsatisfactory control effects of the existing multiple insecticides on fig beetles.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An insecticide composition is used for preventing and controlling fig beetles. The insecticide composition is compounded by doramectin and pyraclostrobin or tolfenpyrad; the mass ratio of doramectin to pyraclostrobin is 1-15:30-1; the mass ratio of doramectin to tolfenpyrad is 1-20:5-1.

[0008] Furthermore, the mass ratio of doramectin to pyraclostrobin is 1:7.

[0009] A pesticide comprises the pesticide composition and auxiliary components; the mass of the pesticide composition accounts for 0.1-70% of the total mass of the pesticide.

[0010] Furthermore, the mass of the insecticide composition accounts for 12-55% of the total mass of the insecticide.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] When doramectin of the present invention is compounded with pyrimidine or tolfenpyrad, the compound combination shows a combined synergistic effect on fig beetles in the mass ratio range of 1-15:30-1 and 1-20:5-1, respectively. This indicates that the insecticidal composition of the present invention can improve the control effect on fig beetles. In addition, the insecticidal mechanism of doramectin and other components in the insecticidal composition of the present invention is different, which is conducive to delaying the accumulation and development of drug resistance of fig beetles and helps to prolong the renewal time of the agent. DETAILED DESCRIPTION

[0013] The following is a clear and complete description of the technical solution of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by technicians in this field without creative work are within the scope of protection of the present invention.

[0014] Example :Indoor biological activity test of doramectin compound

[0015] 1. Test reagents

[0016] 98% doramectin technical, 96% pyraclostrobin technical, 98% tolfenpyrad technical, all of the above agents are commercially available.

[0017] 2. Test pests

[0018] For the fig beetle, adults with the same physiological state were selected as test subjects.

[0019] 3. Test method: (Refer to "NY / T 1154.6-2006 Pesticide Indoor Bioassay Test Guidelines Insecticides Part 6: Insecticide Activity Test Insect Immersion Method")

[0020] After the test agent is dissolved in dimethyl sulfoxide, it is diluted with a 0.1% Tween-80 aqueous solution to prepare a single-dose stock solution with an active ingredient concentration of 10,000 mg / L. Set up multiple groups of ratios, and dilute the single-dose stock solution and each group of mixed agents with a 0.1% Tween-80 aqueous solution into 5 mass concentration gradients for use. Take the test pests and immerse them in the liquid for 10 seconds, then take them out, absorb the excess liquid with filter paper, and transfer them to the original feeding conditions for feeding. Each treatment is set up with 4 repetitions, 25 insects are immersed in each repetition, and the treatment with 0.1% Tween-80 aqueous solution is set as a blank control.

[0021] After 24 hours of treatment, the mortality of the test insects was investigated. The insects that did not respond to a light touch of a brush were considered dead. The corrected mortality rate was calculated based on the survey results, and the DPS software was used to perform regression analysis on the logarithmic value of the concentration of the agent and the corrected mortality probability value to calculate the LC of each treatment agent. 50 .

[0022]

[0023] In the above formula: P--mortality rate, unit is %; K--number of dead insects; N--total number of insects treated.

[0024]

[0025] In the above formula: P1--corrected mortality rate, unit is %; P t --Treatment mortality rate, in %; P0--blank control mortality rate, in %.

[0026] 4. Pharmaceutical evaluation

[0027] The Sun Yunpei method was used to calculate the co-toxicity coefficient (CTC value) of the mixture and evaluate the type of combined action of the drugs: a co-toxicity coefficient (CTC) ≥ 120 indicates a synergistic effect; a co-toxicity coefficient (CTC) ≤ 80 indicates an antagonistic effect; and a co-toxicity coefficient (CTC) 80 < 120 indicates an additive effect. The results are shown in Table 1-2.

[0028] Table 1 Indoor bioactivity test of doramectin and pyraclostrobin against fig beetle

[0029] Drug name and ratio <![CDATA[LC 50 (mg / L)]]> ATI TTI CTC Doramectin 16.5718 100.0000 -- -- Pentometabolic acid 6.4943 255.1745 -- -- Doramectin 1: Pentometabolic guanidine 30 5.3887 307.5287 250.1689 122.9284 Doramectin 1: Pentometabolic guanidine 15 2.8063 590.5213 245.4761 240.5616 Doramectin 1: Pentometabolic guanidine 7 1.4521 1141.2299 235.7777 484.0279 Doramectin 1: Pentometabolic guanidine 3 3.8875 426.2842 216.3809 197.0064 Doramectin 1: Pentometabolic guanidine 1 6.1574 269.1363 177.5873 151.5516 Doramectin 3: Pentometabolic guanidine 1 9.3557 177.1305 138.7936 127.6215 Doramectin 7: Pentometabolic guanidine 1 8.4638 195.7962 119.3968 163.9878 Doramectin 15: Pentometabolic guanidine 1 12.0446 137.5870 109.6984 125.4229

[0030] It can be seen from Table 1 that the co-toxicity coefficients of doramectin and pyrimidine in the mass ratio range of 1-15:30-1 are all greater than 120, that is, the biological activity of doramectin and pyrimidine against the fig beetle after the combination shows a synergistic effect.

[0031] Table 2 Indoor bioactivity test of doramectin and tolfenpyrad against fig beetle

[0032] Drug name and ratio <![CDATA[LC 50 (mg / L)]]> ATI TTI CTC Doramectin 16.5718 100.0000 -- -- Tolfenpyrad 13.4276 123.4159 -- -- Doramectin 1: Tolfenpyrad 5 8.3207 199.1635 119.5133 166.6455 Doramectin 1: Tolfenpyrad 1 11.7416 141.1375 111.7080 126.3450 Doramectin 5: Tolfenpyrad 1 10.8528 152.6961 103.9027 146.9607 Doramectin 10: Tolfenpyrad 1 8.6381 191.8454 102.1287 187.8467 Doramectin 20: Tolfenpyrad 1 12.6712 130.7832 101.1150 129.3410

[0033] It can be seen from Table 2 that the co-toxicity coefficients of doramectin and tolfenpyrad in the mass ratio range of 1-20:5-1 are all greater than 120, that is, the biological activity of doramectin and tolfenpyrad against the fig beetle shows a synergistic effect.

[0034] In summary, when doramectin of the present invention is compounded with pyraclostrobin or tolfenpyrad, the compound combination exhibits a combined synergistic effect on the fig beetle in the mass ratio ranges of 1-15:30-1 and 1-20:5-1, respectively.

Claims

1. An insecticidal composition for controlling fig beetles, characterized in that: The insecticide composition is prepared by compounding doramectin with pyrimidine or tolfenpyrad; the mass ratio of doramectin to pyrimidine is 1-15:30-1; the mass ratio of doramectin to tolfenpyrad is 1-20:5-1.

2. The insecticidal composition according to claim 1, characterized in that The mass ratio of doramectin to pyraclostrobin is 1:

7.

3. An insecticide, characterized in that: The insecticide comprises the insecticide composition according to claim 1 and auxiliary components; the mass of the insecticide composition accounts for 0.1-70% of the total mass of the insecticide.

4. The insecticide according to claim 1, characterized in that The mass of the insecticide composition accounts for 12-55% of the total mass of the insecticide.

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