【摘要】 铜绿金龟(虫甲)是北京地区的一种重要害虫,一年发生一代,以3龄幼虫在土壤51～75厘米深层越冬。成虫每年6～9月出现,成虫有较强的趋光性,一日内以19:30′～21:00′活动最盛。成虫食性杂,每一雌虫一生可产卵30～40粒。产卵期为4～5天。在9种含水量(0.3、2、4、6、8、10、15、20和25%)土壤与5种温度(10、17、25、30、37℃)组合下,试验结果卵在温度25℃与8～15%含水量土壤内孵化率最高。卵的发育起点温度是9.14±1.15℃,发育有效积温为178.05日度。幼虫季节性垂直分布与10厘米土温变化有关,秋季当10厘米土温低于10℃,幼虫向土壤深层迁移,春季当10厘米土温高于6℃幼虫向土壤表层迁移。每年4～5月及8～9月幼虫10厘米作物外进行为害,这时亦导防治的有利时机。更多还原

【Abstract】 Anomala corpulenta Motschulsky is an important insect pest in Bei- jing.It haslgeneration per year.The 3rd instar larvae overwinter in burrows from 51 to 75cm underground,The adults appear in the period from June to September,and are in maximum number from late June to late July.The adults stay in the soil in daytime and begin to climb up to the surface by 18:30 pm.The most active time of the day is 19:30～ 21:00. Each female oviposites 30～40 eggs in its life,with 70 as the maxi- mum.The period of oviposition extends 4～5 days generally.The life of the female is longer than the male. Experiment in which 2250 eggs were reared in the soil with different water eontens as 0.3,2,4,6,8)10)15)20)25%,combined with various temperatures of 10、17、25、30℃ and 37℃,total of 45 treatme- nts showed the most favorable condition for hatching is 25℃ and with a water content ranging from 8% to 15%.Under this condition,the hig- hest rate of hatching in soil can reach 96%. The seasonal vertical distribution of the larvae is relevant to the temperature variation of the 10 cm layer of soil.When the temperature of the 10 em layer of soil is lower than 10℃ in fall,the larvae move down to deeper location,and come up ward to the surface when the 10cm layer temperature exceeds 6℃ in spring.The larvae feed around plant roots about 10cm below the surface in the periods from April to May and from August to September and cause damages.This is also the sui- table time for control.更多还原