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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。
Copper beetle (Pest) is an important pest in Beijing, a generation a year, to third instar larvae in the soil deep in the winter of 51 to 75 cm. Adults from June to September each year, adults have a strong phototaxis, one day to 19:30 ’~ 21:00’ activity of the most. Adult feeding habits, each female may spawn life 30 ~ 40 tablets. Spawning period of 4 to 5 days. Under the combination of 9 kinds of soil (0.3, 2, 4, 6, 8, 10, 15, 20 and 25%) and 5 kinds of temperature (10,17,25,30,37 ℃) 25 ℃ and 8 ~ 15% water content in the soil hatch rate is the highest. The starting point of egg development temperature is 9.14 ± 1.15 ℃, the development of effective accumulated temperature of 178.05 days. The seasonal vertical distribution of larvae was related to 10 cm soil temperature change. In autumn, when 10 cm soil temperature was lower than 10 ℃, the larva migrated to the soil layer. In spring, the larva migrated to soil surface when the 10 cm soil temperature was higher than 6 ℃. From April to May and from August to September each year, 10 cm of the larvae are harmed outside the crop, and this is also a favorable opportunity for prevention and treatment.