Control Effect of 10% Avermectins?Flutolanil against Old Larva of Cnaphalocrocis medinalis Guenee
In order to select the great control chemical agency for Cnaphalocrocis medinalis Guenee, 10% Avermectins?Flutolanil, produced by Bayer CropScience China Co. Ltd., was selected to conduct field efficacy trial in 3-instar-larva peak period of Cnaphalocrocis medinalis Guenee. The results showed that if only use 10% Avermectins?Flutolanil, the optimum dosage was 450~600 mL/hm2, and the control effect on old larva was above 95% on the 7 d after agent applied, which was extremely better than control; moreover, if adding a certain amount of GE silicone to the 10% Avermectins?Flutolanil, the control effect can be improved significantly, meanwhile, the combined agent can perform good leaf-protecting effect and had quick and long effect, therefore, it had huge potential to be promoted.
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