Pesticide composition for preventing and controlling thrips of mangoes

[0018] Example 1: Indoor toxicity determination of cyantraniliprole, carbosulfan and different ratios on mango tea yellow thrips

[0019] Test drug: 94% of the original drug of cyantraniliprole (DuPont, USA); 90% of the original drug of carbosulfan (Hubei Sanonda Co., Ltd.), the original drug was prepared into the required test drug according to the conventional method .

[0020] Test object: Mango tea yellow thrips, collected from the suburbs of Tianyang County, Guangxi, and raised with potted mango seedlings indoors.

[0021] Test method: The test refers to the "Agricultural Industry Standards of the People's Republic of China" (Pesticide Indoor Bioassay Test Guidelines for Insecticides NY/T1154.14-2008), and the leaf soaking method is used. Cut the fresh and tender mango (green) leaves into 5mm*20mm strips, soak them in the prepared medicinal solution for 10 seconds, take them out and dry them fully in the shade, and put them into finger-shaped tubes (5cm high, 1cm inner diameter); Adults of Thrips thea yellow with consistent growth were gently picked into the tube and sealed with plastic wrap; 20 test insects per tube, each treatment was repeated 3 times, and the soaking water treatment was set as a control; the test tube was placed flat on a white porcelain plate, Shade with a black cloth, place in a 26-27°C incubator for cultivation, and check the number of dead insects within 48 hours.

[0022] Use DPS data processing software for statistical analysis, calculate the regression curve, and calculate the LC of each drug 50 , using the co-toxicity coefficient method (CTC) proposed by Sun Yunpei et al. in 1960 to evaluate the synergistic effect of drug mixture. The composition shows antagonistic effect; when 80

[0023] Table 1 Indoor toxicity determination of cyantraniliprole, carbosulfan and different ratios on mango tea yellow thrips

[0024] Test drug Proportion LC50(μg/mL) co-toxicity coefficient Cyantraniliprole (A) / 1.72 / Carbosulfan (B) / 2.61 / A:B 1:2 1.59 140.6 A:B 1:3 1.70 136.1 A:B 1:5 1.43 167.6 A:B 2:3 1.22 177.2 A:B 2:5 1.43 159.1 A:B 3:2 1.44 138.3 A:B 3:5 1.52 144.1 A:B 9:1 2.27 78.8

[0025] The test results show that when cyantraniliprole and carbosulfan are mixed in the range of 1-3:2-5 by weight, the co-toxicity coefficient (CTC) is greater than 120, showing a good synergistic effect Wherein when the weight ratio of cyantraniliprole and carbosulfan is 2:3, its co-toxicity coefficient is the largest, and the mango tea yellow thrips has good control effect, can reduce the dosage of each single dose, reduce Pesticide costs.

[0026] 2. Preparation Examples

[0027] Example 1: 25% cyantraniliprole Carbosulfan suspension concentrate

[0028] Weigh 10% cyantraniliprole, 15% carbosulfan, 5% calcium dodecylbenzenesulfonate, 4% saponin powder, 2% silicone oil, 1.2% polyvinylpyrrolidone, 0.8 diethylene glycol %, deionized water was added to 100%, and mixed to prepare 30% cyantraniliprole·carbsulfur suspension concentrate.

[0029] Example 2: 20% cyantraniliprole · carbosulfan suspension concentrate

[0030] Weigh 10% cyantraniliprole, 10% carbosulfan, 6% alkylphenol polyoxyethylene sulfonate, 6% sodium dodecylbenzenesulfonate, 1% C8-10 fatty alcohol, phenolic aldehyde Add 2% resin and deionized water to 100%, and mix to prepare 20% cyantraniliprole-spinosyn suspension concentrate.

[0031] Example 3: 15% cyantraniliprole Carbosulfan suspension concentrate

[0032] Weigh 10% cyantraniliprole, 5% carbosulfan, 6% ester polyoxyethylene, 5% Sapindus powder, 1.2% silicone, 2% methylcellulose, deionized water Add to 100%, and mix to prepare 15% cyantraniliprole-carbofuran suspension concentrate.