几种生物农药对曲纹紫灰蝶的防治效果

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开放科学（资源服务）标识码（OSID）：

Control EffectofBiopesticideson Cycasszechuanensis

NGYuan-hui （Shaxian Ecological State-owned Forest Farm，Sanming，Fujian 365050）

AbstractIndertovealthecontrolfectofiopestiidesothelarvaofteChidespanda，toaddressthchnaldsofnon toxic control of the C .pandava in production，and to ensure thehealthy growthof the Cycas szechuanensis population，provide technical support for the non-toxic control of the C . szechuanensis population. In 2O23，a test area was established in the Taojinshan C . szechuanensis Nature Reserve in Shaxian District，and conducted tests on the control of the larvae of c .pandava using four biopesticides， including 1.2% nicotinespartine， 25% avermectin methylurea， 1.5% spartine， 4% rotenone.The control effects of different concentrations of the pesticides on the larvae of C ：pandava were compared.Theresultsshowed thattheeffectof diferentconcentrations ofthepesticidesonthe larvaeof c .pandava was significantly different. After 6 days of treatment，the corrected mortality rate of the C . pandava exceeded 86.9% at two concentrations of 25% avermectin methylurea SC， 1.5% spartine， 4% rotenone，and 1.2% nicotine-spartine. The recommended usage rates for each pesticide are as： 1.2% nicotine-spartine and 1.5% spartine are both 1 500 times dilution， 4% tenone is 8Oo times dilution，the solution diluted 1000 times for 25% avermectin methylurea.This indicates that the four biopesticides have a strong lethal efecton the larvae of the C . pandava. Spraying the four pesticides at the recommended doses significantly reduce the number of larvae of the C .pandava on the C . szechuanensis population，thereby protecting the healthy growth of the C . szechuanensis.

Key words Chilades pandava;Cycas szechuanensis;Larvae;Insect population;Non-pollution; Control

曲纹紫灰蝶（ChiladespandavaHorsfield）为鳞翅目灰蝶科昆虫，是为害苏铁属植物的主要害虫[1]。（剩余5543字）