Aqueous emulsion capable of preventing and treating rice leaf roller

Abstract

The invention relates to a water emulsion used for controlling cnaphalocrocis medinalis, and pertains to the technical field of pesticides. The water emulsion is composed of the following components by weight percentage: 10 to 40 percent of chlorpyrifos, 0.2 to 5 percent of emamectin benzoate, 5 to 15 percent of emulsity agent, 1 to 10 percent of antifreezing agent, 10 to 30 percent of solvent and water for the rest supplement. Compared with the existing agents for controlling cnaphalocrocis medinalis, the water emulsion has the following advantages that: 1. as alkylbenzene sulfonate metal salt is taken as the emulsity agent, the decomposition of the emamectin benzoate in the water can be retarded and the pesticide application effect is improved; 2. the water emulsion has obvious synergy to the rice fulgorid; 3. the water emulsion can replace riskiest pesticides (acephatemet and the like), reduce the dosage and the usage amount of the organic solvent, and reduce the environment pollution and the farm product remain; 4. the water emulsion can retard the drug resistance of the cnaphalocrocis medinalis and improve the desinsection speed.

Description

technical field [0001] The invention belongs to the technical field of pesticides, and relates to an emulsion in water for controlling rice leaf rollers. Background technique [0002] Rice leaf roller is the most important migratory pest of rice, which affects rice yield by eating functional leaves of rice. In the Jianghuai rice region, the rice leaf roller has 3-4 generations all the year round, and each generation has 3-4 peak times due to the immigrant generation and the local temperature change, which causes the occurrence of the rice leaf roller It is difficult to predict the generation and occurrence period. In the 1960s and 1980s, the control of rice leaf rollers in my country mainly used highly toxic organophosphorus insecticides such as methamidophos to spray the rice leaf rollers at the larval stage; but since the 1990s, my country has used Nereistoxins insecticides such as monosultap and dimehypo control the rice leaf roller. At present, the control methods of r...

AI Technical Summary

Problems solved by technology

However, due to the fact that rice leaf rollers move into places at different times, there are many peaks, and generation overlap is obvious; so this kind of insecticides has a common defect in the control of rice leaf rollers: the persistence period is too long. short

However, repeated application of pesticides not only increases the cost of farming, but also has a great impact on the quality of agricultural products and the environment.

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