Pesticide composition containing guadipyr and triflumezopyrim

Abstract

The invention discloses a pesticide composition containing guadipyr and triflumezopyrim, and belongs to the technical field of pesticides. According to the pesticide composition provided by the invention, the effective components are formed by binary compounding of guadipyr and triflumezopyrim. According to the pesticide composition disclosed by the invention, the two effective components, namely the guadipyr and the triflumezopyrim, are compounded according to a specific ratio, and a relatively good synergistic interaction effect is shown on rice planthoppers.

Description

Technical Field

[0003] This application relates to the field of pesticide technology, specifically to a pesticide composition containing pendimethalin and trifluoropyrimidine. Background Technology

[0005] Pendimethalin is a new compound developed by China Agricultural University by combining the active structures of neonicotinoids and urea-based insecticides. It is a novel and highly effective insecticide that combines the characteristics of neonicotinoids and sodium ion channel inhibitors. It has broad insecticidal activity and multiple target sites, and has good control efficacy against aphids, planthoppers, leafhoppers and other homoptera pests, as well as lepidopteran pests such as bollworms and diamondback moths.

[0006] Trifluorophenylpyrimidine is a novel metronidazole insecticide developed by DuPont. It is an acetylcholine receptor inhibitor and exhibits no cross-resistance with existing neonicotinoid insecticides. In the field control of white-backed planthoppers, it demonstrates high efficiency, rapid action, long-lasting effect, and low dosage, while also being environmentally friendly and having no adverse effects on pollinating insects.

[0007] Long-term use of a single pesticide increases the risk of pesticide resistance. Rational formulation of pesticides can improve efficacy and reduce pesticide resistance in pests. Currently, no specific technical solutions for pesticide compositions containing pendimethalin and trifluralin have been disclosed. Summary of the Invention

[0009] The purpose of this invention is to provide a pesticide composition containing pendimethalin and trifluralin to overcome the problem of pests developing resistance due to long-term single application of pesticides.

[0010] To achieve the above objectives, the present invention provides the following technical solution:

[0011] The present invention aims to provide a pesticide composition containing pendimethalin and trifluoropyrimidine, wherein the active ingredient is a binary compound of pendimethalin and trifluoropyrimidine.

[0012] The mass ratio of pendimethalin to trifluorophenylpyrimidine is 9:1 to 5:5; preferably, the mass ratio is 8:2 to 6:4.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (1) The pesticide composition of the present invention contains two active ingredients, pendimethalin and trifluorophenylpyrimidine, which are combined in a specific ratio and show a good synergistic effect on rice planthoppers.

[0015] (2) The pesticide composition of the present invention contains tebufenozide and trifluoropyrimidine with different mechanisms of action. The combination of the two reduces the risk of resistance from a single agent. Detailed Implementation

[0017] The technical solution of this invention patent will be clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention.

[0018] Example: Indoor activity test of pesticide composition

[0019] Test insect source: The rice brown planthopper was collected from rice fields in Wuxun Village, Binhai County, Yancheng City, Jiangsu Province. Indoor toxicity was determined by rearing the planthoppers in rice seedlings at the tillering stage until the next generation of 3rd instar nymphs. Insect rearing conditions: temperature (25±1)℃, humidity 70%-80%, photoperiod 16h:8h (L:D).

[0020] Preparation of the agent: Dissolve the technical grade imidacloprid and trifluralin in acetone to prepare a stock solution. Then, use water containing 0.1% Tween 80 to prepare single-agent and compound agents with five concentration gradients.

[0021] Methods: The rice stem immersion method reported by Zhuang Yonglin et al. was adopted. Rice plants in the tillering stage were pulled up by the roots, washed, and cut into rooted stems about 10 cm long. The stems were then dried, with 3 plants per group. The rice stems were immersed in the prepared pesticide solution for 30 seconds, removed, and slightly dried. The roots were then wrapped with moist absorbent cotton and placed in culture cups. 3rd instar nymphs were selected and placed into the culture cups, 20 per cup. Each treatment was repeated 3 times, for a total of 60 nymphs. An acetone-Tween 80 aqueous solution without the pesticide was used as a blank control. After inoculation, the culture cups were placed in a constant temperature incubator at (28±1)℃ with a photoperiod of 16h:8h (L:D).

[0022] Investigation: The results of the experiment were investigated 92 hours after the insects were introduced. The insects were considered dead when they could not move in a coordinated manner when touched with a brush. The control group had a mortality rate of less than 10% to be considered a valid experiment.

[0023] Data Analysis: Mortality rates were calculated by performing regression analysis on the logarithmic values ​​of each drug concentration and the corresponding corrected mortality rates. The LC ratios for single-dose and mixtures were calculated using DPS software. 50 The interaction of the mixtures was evaluated according to the Wadley method, where SR = 0.5-1.5, the two drugs have an additive effect; SR ≤ 0.5, the effect is antagonistic; and SR ≥ 1.5, the effect is synergistic. The calculation results are shown in Table 1.

[0024] LC 50 (Theoretical value) = (a+b) / (a / LC) 50a +b / LC50b )

[0025] SR=LC 50 (Theoretical value) / LC 50 (Actual value)

[0026] Table 1. Results of indoor activity assays of pesticide compositions against rice brown planthopper.

[0027] Drug Name and Proportion <![CDATA[LC 50 Actual value (mg / L) <![CDATA[LC 50 Theoretical value (mg / L) SR Pyrimethanil 8.45 / / Trifluoropyrimidine 0.37 / / Pendimethalin: Trifluoropyrimidine (18:1) 2.87 3.93 1.37 Pendimethalin: Trifluoropyrimidine (9:1) 1.46 2.65 1.82 Pendimethalin: Trifluoropyrimidine (8:2) 0.60 1.57 2.64 Pendimethalin: Trifluoropyrimidine (7:3) 0.30 1.12 3.78 Pendimethalin: Trifluoropyrimidine (6:4) 0.37 0.87 2.35 Pendimethalin: Trifluoropyrimidine (5:5) 0.41 0.71 1.72 Pendimethalin: Trifluoropyrimidine (4:6) 0.42 0.60 1.41 Pendimethalin: Trifluoropyrimidine (3:7) 0.41 0.52 1.28 Pendimethalin: Trifluoropyrimidine (2:8) 0.44 0.46 1.05

[0028] As shown in Table 1, the synergistic coefficients of pendimethalin and trifluralin in the mass ratio range of 9:1 to 5:5 are all greater than 1.5, indicating that pendimethalin and trifluralin, when combined in a specific ratio, have a synergistic effect on rice planthoppers. In particular, when the mass ratio is 8:2 to 6:4, the synergistic coefficients are all greater than 2.3, showing a significant synergistic effect.

[0029] The exemplary embodiments have been chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various exemplary embodiments of the invention, as well as various alternatives and modifications. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. A pesticide composition containing pendimethalin and trifluoropyrimidine, wherein the active ingredient is composed of a binary compound of pendimethalin and trifluoropyrimidine, wherein the mass ratio of pendimethalin to trifluoropyrimidine is 9:1 to 5:

5.

2. The agricultural composition according to claim 1, characterized in that, The mass ratio of pendimethalin to trifluorophenylpyrimidine is 8:2 to 6:4.