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1985—1990年,在江苏省句容县调查暗黑鳃金龟(Holotrichia parallela)占草莓田蛴螬总数的88.89%—92.59%,是苏南地区为害草莓蛴螬的优势种。蛴螬主要以幼虫为害草莓根茎。危害严重时可将草莓根茎啃食殆尽,导致萎蔫枯死。该虫有转株为害特点,每头幼虫可为害4—6株草莓苗。暗黑鳃金龟在句容县1a(年)发生1代,以3龄老熟幼虫在土中越冬。翌年5月上旬开始化蛹,6月上旬成虫开始出土活动.6月下旬至7月为成虫盛发期。6月下旬开始见卵,卵多产于植株根围5—10cm 土层内。6月底初见幼虫,7月底至8月初为2龄盛期。8月中旬进入3龄盛期,即幼虫为害盛期。防治试验表
From 1985 to 1990, Holotrichia parallela in Jurong County, Jiangsu Province, accounted for 88.89% -92.59% of the total number of strawberry fields, which was the dominant species of strawberry gall in southern Jiangsu.蛴 螬 mainly to larvae damage strawberry roots. Serious damage to the straw can be eaten when the roots, resulting in wilted dead. The insect pest strain characteristics, each larvae can damage 4-6 strains of strawberry seedlings. Diabrotica in the Jurong County 1a (year) occurred 1 generation, with 3-year-old mature larva overwintering in the soil. The pups began to pupate in early May the following year, and adults started unearthed in early June. Begin to see the egg in late June, the egg is prolific in the plant root circumference 5-10cm soil layer. At the beginning of June, the larvae were seen, and from the end of July to early August, they were 2-year-old peak. In mid-August into the 3rd age, that larvae damage peak. Control test table