粗绿彩丽金龟生物学特性及其防治

粗绿彩丽金龟[Mimela holosericea(Fabricius)]在甘肃省白龙江林区年发生1代,以3龄幼虫在土壤中越冬。每年4月中旬越冬幼虫开始上升为害,5月下旬老熟幼虫开始化蛹,蛹期平均18 d,7月上、中旬为成虫盛发期,6月下旬成虫开始产卵,卵期15 d。1龄幼虫期16~27 d,2龄幼虫期28~41 d,3龄幼虫期265~290 d。雌雄性比接近1∶1,成虫具趋光性,雌虫的趋光性最强。本文提出了防治措施。

Studies on the biological characteristics and control of Mimela holosericea

This species produced only one generation per year in Bailongjiang forest zones of Gansu Province.It over-winters as 3rd instar larvae,which began to damage the crops in mid-April.The mature larvae usually pupate in late May,lasting for 18 days on average.The occurrence peak stage of the adults appeared in early July.The adults began to oviposit in late June,which lasted for about 15 days.The 1st instar larval phase lasted for 16～27 days,while the 2nd instar larval phase for 28～41 days and the 3rd instar larval phase for 265～290 days.The ratio between male and female was nearly 1∶1,and the adults were characterized by phototaxis,especially female adults.Both the larvae and adults should be controlled underearth and on the earth.The method of combining chemical control with physical control should be applied.The earth and manure should be sterilized rigidly.The ascending period of larvae should be controlled by chemical pesticides.The peak emergence period of adults could be controlled by light trapping or pesticide spraying,which decreased the amount of eggs.