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大麻叶蜂是安徽麻区大麻上的主要害虫之一。单食性,以幼虫咀食大麻叶片形成孔洞和缺刻,严重时仅残留叶柄和主叶脉,致使麻皮产量锐减。据室内饲养及结合田间定点观察,大麻叶蜂在安徽六安每年发生二代,以老熟幼虫于土内结茧越冬。两性或孤雌生殖,幼虫六龄、三龄前食量小,是药剂防治的有利时机,幼虫有趋嫩性和假死性。 室内测定和田间试验表明,喷洒杀螟松、乐果、西维因和敌敌畏1,000倍液,对三龄前幼虫有很好的效果,特别是杀螟松效果更佳,杀虫快速,药效期长,即使对高龄幼虫仍有良好的效果。
Cannabis leaf bee is one of the major pests on marijuana field in Anhui. Simplex to larvae eaten cannabis leaves to form holes and nicks, severe left only petiole and the main vein, resulting in sharp decline in the output of hemp bark. According to the indoor feeding and field observation of fixed-point observation, cannabis leaf bee occurred in Anhui Lu’an two generations each year, with mature larvae in the soil cocoon wintering. Sex or parthenogenesis, six instar larvae, three small antebellum, is a good time to control agents, larvae tendentious and lethal. Laboratory tests and field trials showed that spray fenitrothion, dimethoate, and carbaryl and dichlorvos 1,000 times the liquid before the third instar larvae have good results, especially fenitrothion better effect, fast insecticide, efficacy Long period, even for older larvae still have good results.