CN104222089B - A kind of compounded pesticides - Google Patents

Abstract

The invention relates to a compound insecticide, which contains two active components of cyantraniliprole and nitenpyram, and the weight ratio of the two active components is 1:60-60:1. The compound insecticide has a wide insecticidal spectrum, delays the generation of drug resistance, prolongs the effective period, and has obvious synergistic effect.

Description

a compound insecticide

technical field

The invention belongs to the field of pesticides, in particular to a compound insecticide containing cyantraniliprole and nitenpyram.

Background technique

Cyantraniliprole (ZJ4042) is a phthalamide insecticide independently developed by Zhejiang Research Institute of Chemical Industry Co., Ltd. It is a new type of insecticide with high efficiency, low toxicity and unique mechanism of action discovered in recent years. . It acts on the ryanodine receptor of insects, releases endogenous calcium ions from insect cells, and affects muscle contraction. This type of insecticide has become a research hotspot for the creation of new pesticides. It has a relatively good effect on Yangtze River pests such as diamondback moth, beet armyworm, and rice planthopper.

Nitenpyram (nitenpyram) nicotinimide is another new product developed in Japan following imidacloprid and acetamiprid. It has excellent systemic properties, penetration, wide insecticidal spectrum, and is safe and non-toxic. It is a replacement product for controlling piercing-sucking mouthparts pests such as whitefly, aphid, pear psyllid, leafhopper and thrips.

Rice planthopper is one of the common pests of rice. There are mainly three kinds of brown planthopper (Nilaparvata lugens), white-backed planthopper (Sogatella furcifera) and white-backed planthopper (Laodelphax striatellus), which damage rice and other crops by piercing and sucking plant juice.

Contents of the invention

The purpose of the present invention is to provide an insecticidal composition with long lasting effect, high quick-acting effect and safety compared to existing products, which can better prevent and control difficult-to-control pests. Specifically, it relates to a compound insecticide with cyantraniliprole and nitenpyram as active ingredients.

In the above compound insecticide, the weight ratio of cyantraniliprole to nitenpyram is 1:60-60:1.

The formulations of the present invention, including suspension concentrates and water-dispersible granules, can be prepared by using the above-mentioned compound insecticides together with adjuvants known to those skilled in the art.

The present invention has the advantages and beneficial effects: 1. The compound preparation, the two active ingredients have a synergistic effect; 2. It has good quick-acting properties against difficult-to-control pests; 3. It has a long lasting effect.

The applicant first conducted research on formula screening of cyantraniliprole and nitenpyram, and based on the characteristics of the two components, the object of the indoor biotest was the rice planthopper. The specific experimental conditions and results are as follows:

The indoor bioassay method is as follows: use 90% of the original drug of cyantraniliprole and 90% of the original drug of nitenpyram, according to the set ratio concentration, prepare a drug solution with the required concentration, and set it aside. Referring to the Indoor Bioassay Test Guidelines for Insecticides and Pesticides (Agricultural Industry Standard NY/T1154.14-2008), the capillary micro-drop method was adopted, and the volume of the capillary micro-dropper was 1.0 μL. Use a micro-dropper to drip the liquid medicine on the back of the rice planthopper head by head, and treat about 100 rice planthoppers at each concentration. After the treatment, put the rice planthopper into an insect cage with rice in it for feeding. Another 100 larvae were dripped with acetone as a control. The treated rice planthoppers were still placed in the breeding room, and the mortality rate was checked after 48 hours. The data were statistically processed with SPSS software. Obtain the toxicity regression formula, lethal concentration, correlation coefficient, etc., and use Sun Yunpei's method to obtain the co-toxicity coefficient.

The joint toxicity of the mixed preparation is expressed by Sun Yunpei's co-toxicity coefficient method:

The theoretical toxicity index TTI of the mixed preparation = ∑ (toxicity index ATI of a drug × the percentage of the active ingredient of the drug in the mixed preparation).

When the CTC is greater than 120, it is a synergistic effect, when it is less than 80, it is an antagonistic effect, and when it is 80-120, it is an additive effect.

Table 1 The toxicity test results of different ratios to rice planthopper

The above bioassay results show that when cyantraniliprole and nitenpyram are compounded in different proportions, the co-toxicity coefficients of all compounded formulas are greater than 120, which has obvious synergistic effect.

The following specific examples are used to further describe the present invention in detail, but the present invention is by no means limited to these following examples. The percentages in the formula are all percentages by weight, and the original drugs and auxiliary agents used are all purchased from other manufacturers.

The recipe example is as follows:

Example 1: 30.5% cyantraniliprole-nitenpyram suspension concentrate

Example 2: 32.8% cyantraniliprole · nitenpyram water dispersible granules

Example 3: 21% cyantraniliprole · nitenpyram suspension concentrate

Example 4: 16.5% cyantraniliprole · nitenpyram suspension concentrate

Example five: 18% chlorflucytraniliprole Nitenpyram suspension concentrate

Example 6: 10% cyantraniliprole · nitenpyram suspension concentrate

Example 7: 24% cyantraniliprole · nitenpyram suspension concentrate

Example 8: 33% cyantraniliprole · nitenpyram suspension concentrate

Example 9: 62% cyantraniliprole · nitenpyram water dispersible granules

Example 10: 36.6% cyantraniliprole · nitenpyram water dispersible granules

The formula samples of the above ten examples were prepared respectively, and field experiments were carried out on 18% cyantraniliprole nitenpyram suspension concentrate and other compound formulas to control rice planthoppers. The comparison of the effect of a single agent of 30% nitenpyram water agent and 30% nitenpyram water agent to verify the synergistic effect after compounding. The test site is Xinyu County, Jiangxi Province, and the time is July 3, 2013. There are four treatments in the test, and each treatment has three repetitions. The plots are randomly arranged, and the area of the plot is 68m ² . Similarly, record the weather data on the day of spraying and the following week, as follows:

Table 2 Meteorological data during the test period

The survey standard is: 3 days, 7 days, and 14 days after spraying, the population base of rice planthoppers should be surveyed once, and 20 points of rice planthoppers should be sampled in parallel and skipped by pan-beating method. Investigate 3 days after spraying and calculate the population decline rate, investigate 7 days and 14 days after spraying and calculate the control effect. The specific calculation formula and data (the data is the average value of three repetitions) are as follows:

Corrected insect population reduction rate = treated insect population reduction rate - blank control insect population reduction rate

Table 3 Field efficacy test of 18% cyantraniliprole · nitenpyram suspension concentrate and other compound formulations on rice planthopper

Analyzing the above experimental data, under the same effective dose, the control effect of the compound preparation is significantly higher than that of the two single doses, and the seedling preservation effect of the compound preparation exceeds 87% after 7 days and 14 days after treatment, while the two single doses The seedling preservation effects of the agent 14d were 58.93% and 59.29%, respectively, which shows that the two components have a good synergistic effect after compounding. The control effect of the compound medicine in 14 days is better than that in 7 days, and compared with the single medicine, it prolongs the duration of effect.

Claims (2)

1. A compound insecticide, characterized in that: the active ingredient is composed of cyantraniliprole and nitenpyram, and the weight ratio of cyantraniliprole and nitenpyram is 1:60～60 :1. 2. The compound insecticide according to claim 1, characterized in that: suspending agent and water dispersible granule are made from active ingredients and auxiliary materials.