35% Chlorantraniliprole WG in Control against Rice Leaf Rollers

Different concentrations of 35% Chlorantraniliprole(WG) against Cnaphalocrocis medinalis in the field efficacy experiments showed that:three concentrations of 35% Chlorantraniliprole(WG) 10.5 g/hm2,21.0 g/hm2,31.5 g/hm2 all had preventive and therapeutic effects on rice leaf roller larvae,of which 31.5 g/ hm2 and 21.0 g/hm2 had more ideal control effects,with the drug control effects 70.25% and 74.38%,respectively,after 3 days;90.36% and 91.98%,respectively,after 8 days;95.71% and 97.83%,respectively,after 13 days;83.75% and 89.95%,respectively,after 18 days.Even after 30d,the drug efficacy was still higher than the standard,reaching 46.25% and 49.75%,respectively.So,with longer effect duration,this pesticide can reduce the loss of rice yield from insect damage.