金黄指突水虻的生物学初步研究

The biological characteristics of Ptecticus aurifer

金黄指突水虻Ptecticus aurifer Walker以腐烂的有机物和动物粪便为食,在禽畜粪便处理及生产具有较高经济价值的昆虫蛋白饲料等方面有重要的潜在应用价值。本文对以下内容进行了研究:(1)报道了各虫态形态特征与行为习性。(2)在25℃下,金黄指突水虻从卵到成虫平均需要37 d,4日龄后,幼虫取食量明显增加,体重快速增长,9日龄后体重可增长至0.20 g左右,预蛹能自行爬出培养基寻找干燥的场所化蛹。(3)成虫喜欢阴湿的环境,交配和产卵多发生在清晨或傍晚,成虫交配过程中具有领域性行为,完成交配要求较大的空间。雌性水虻寻找富含腐殖质的地方产卵,平均产卵152粒。(4)在广东省南岭地区,金黄指突水虻一年发生5到6代,世代重叠明显,以预蛹和蛹的形态越冬。

Ptecticus aurifer Walker could consume manure and produce feedstuff for livestock. The morphology and behavior of Ptecticus aurifer were investigated both in field and in laboratory. It needed average 37d from eggs to adults, and the body mass of larva increased fast to 0.20g from 4th day to 9th day in 25℃. Prepupa move away from food to find drier place to pupate. Adults would like to stay in sheltered and humid places, and the males of this fly had strong lekking behaviors. Mating and oviposition were normally observed at morning or evening, and it required a larger space for the adults mating successfully. The female laid average 152 eggs around the places with humus-rich. P. aurifer occured for 5~6 generations a year and overwintered as prepupa or pupa in north Guangdong province.