2002•Xi'nan nongye xuebaoRequires access

Control effects of compound of Bacillus thurmgiensis preparation and chemicals on Cnaphalocrocis medinalis

Hong Wu

Abstract

The control effects of compound of biological insecticide Bacillus thuringiensis(Bt)and 25?% aqueous shachongshuang on Cnaphalocrocis medinalis were studied.Results showed that appling the mixtures of Bt1500mL·hm-2+shachongshuang 1500mL·hm-2 at egg-hatching peak stage had the best control effect.The mortalities of Cnaphalocrosis medinalis would be 96.94?% in 4d,97.38?% in 8d,respectively,and control effect of whitening leaf reached 96.46?%.The trials indicated there was little harmful to natural enemy and had less pollution of environment than chemicals with the characteristics of good economical and ecological benefit.

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Key concepts: Cnaphalocrocis medinalis, Bacillus thuringiensis, Hatching, Toxicology, Biology, Biological pest control, Food science, Botany