Title: Efficacy of 30% Wuniliao EC to larvae of Herse convolvuli(L.) and its effect on Charops bicolor(Szepligeti) larvae of Herse convolvuli(L.)
Abstract: In order to evaluate the effects of 30% Wuniliao EC on Herse convolvuli larvae and Charops bicolor(Szepligeti),lethal effect and sublethal effect of 30% Wuniliao EC,50% Phoxim EC and 48% Chlorprifos EC on the insect pest and the parasitoid were determined.The result of field trial showed that corresponding efficacy of 30% Wuniliao EC,50% Phoxim EC and 48% Chlorprifos EC against the second instar larvae of H.convolvuli at the respective dosage of 50 mL/667 m2,50 mL/667 m2,and 60 mL/m2 diluted with 30 kg water were 0.2%,94.6% and 95.7% one day after treatment;72.7%,87.7% and 97.5% three days after treatment;93.3%,63.6% and 91.1% five days after treatment;86.3%,48.7% and 61.2% ten days after treatment.When both C.bicolor adult and pupae were treated with the above-mentioned 3 insecticides,the survival rate of the former were 98.7%,31.3% and 20.7% respectively and that of the latter were 98.6%,41.3% and 24.6% respectively.The parasitism rate of the parasitoid,which hadn't been directly killed by the above-mentioned 3 insecticides,to larvae of H.convolvuli were 46.7%,16.7% and 7.3%,respectively.The results indicate that 30% Wuniliao EC can be effective to control H.convolvuli and be much safer to C.bicolor.The persistent effect of 30% Wuniliao EC is better than those of other tested insecticides.
Publication Year: 2008
Publication Date: 2008-01-01
Language: en
Type: article
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