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木麻黄皮暗斑螟(EuzopherabatangensisCaradja)在福建省一年发生5代,以幼虫于12月中旬在树干被害处的虫道内越冬(亦有少数以蛹越冬),林间世代重叠现象明显。成虫羽化盛期的温度为30.3—34.0℃,相对湿度为75.7%—84.3%,平均寿命7.9天,产卵量45.7粒。卵孵化率90.5%。幼虫共5龄,具群集性,以第一代幼虫取食量最大,老熟幼虫喜在粪粒层与树干交界部结茧化蛹,蛹期8.5天。皮暗斑螟的天敌有10余种,其中拟小腹茧蜂在自然界的寄生率达16%。
The occurrence of EuzopherabatangensisCaradja occurred in Fujian Province for five generations in a year, with the larva overwintering in mid-December in the larvae of the tree trunk (some of them overwintered in the pupa). The adult eclosion peak temperature was 30.3-34.0 ℃, relative humidity of 75.7% -84.3%, the average life expectancy of 7.9 days, 45.7 eggs. Egg hatching rate of 90.5%. The larvae were all 5-age, clustering with the largest amount of first-generation larvae. The mature larvae developed cocoon pupation at the junction of fecal layer and tree trunk with pupal stage of 8.5 days. There are more than 10 species of natural enemies of Porphyridium cruentus, of which parasitism rate is 16% in nature.