杀铃脲及其混剂对麦田天敌影响的评价

Evaluation of Triflumuron and Triflumuron +Fenvalerate Effecting on Natural Enemies of Wheat Field.

摘要:

杀铃脲属昆虫几丁质合成抑制剂。它不仅对害虫具有较强的毒杀作用,而且对环境和天敌安全。在用该药进行小麦粘虫防治试验的同时,还做了该药对天敌作用的室内测定和田间调查。明确了杀铃脲单剂不同浓度、不同剂型对麦田瓢虫、蜘蛛等主要天敌无杀伤作用,室内处理后的试虫仍能正常化蛹和羽化。杀蛉脲混剂低剂量对天敌无影响,中剂量有一定影响,高剂量影响严重。

Abstract:

Effects of ’Triflumuron and Triflumuron + Fenvalerate toxicity to naturalenemies in the wheat field were evaluated from 1992～1995 in laboratory and field. The results showed that, (1) 20, 100 and 200mg/hm² 20% Triflumuron Suspending agent are safeto 4th instar larvae of ladybird and spider. (2) 250 mL, 500 mL and 1000 mL/hm² Triflumuron 3EC and 150 mL, 750 mL/hm² Triflumuron 20EC are safe to ladybird and spider (dominant natural enemies in the wheat field). (3) 250 mL and 500 mL/hm² Triflumuron + fenvalerate 11.5EC,and 150 mL/hm² Triflumuron + fenvalerate 20EC have slight toxic tonatural enemys. 1000 mL/hm² Triflumuron + fenvalerate 3EC and 750 mL/hm² Triflumuron + fenvalerate 20EC have modertate and high toxicity to natural enemies respectively.