锐劲特对稻田主要捕食性天敌影响的研究

采用田间试验的方法,进行了锐劲特、三唑磷、杀虫双及锐劲特与甲胺磷混用对稻田主要捕食性天敌影响的研究。结果表明,施用5%锐劲特SC30ml/亩1次,药后28d,对天敌的杀伤率分别为蜘蛛0.92%、瓢虫2.97%、步甲3.33%、隐翅虫6.83%、宽黾蝽7.14%,低于18%杀虫双AS250ml/亩及20%三唑磷EC120ml/亩2次的杀伤率。5%锐劲特SC10ml/亩+50%甲胺磷EC80ml/亩对天敌的杀伤作用较大。

Effects of fipronil on main predatory natural enemies in rice fields

Study on the effects of four pesticides (fipronil, triazophos, bisultap, mixture of fipronil and methamidophos) on the main predatory natural enemies was conducted in field experiments. The results showed: the mortalities of 5%fipronil SC 30 ml/per mu once spraying to natural enemies of Araneida, Coccinellidae, Carabidae, Staphyliindae and Veliidae families were 0.92%, 2.97%, 3.33%, 6.83%and 7.14%respectively twenty eight days after application. And these mortalities were lower than those of 18%bisultap AS 250 ml/per mu twice sprayings and 20%triazophos EC 120 ml/per mu twice sprayings. The mortalities of the mixture of 5%fipronil EC 10 ml/per mu and 50%methamidophos EC 80 ml/per mu was higher.