马铃薯地下害虫的发生规律与防治技术研究

Occurrence Patterns and Control Technology for Potato Soil Insects

经田间调查表明,河西灌区马铃薯地下害虫主要以黄老虎[Agrotis segetum]、沟金针虫[Pleonomus canalic-ulatus]为主,其中,黄老虎以老熟幼虫在土中越冬,河西一年发生2代,6月中旬以幼虫取食严重,危害期为春季和秋季,以春季危害较重。金针虫以幼虫危害,危害盛期5月下旬和7月下旬,土壤温度是影响金针虫在土层中的垂直移动和危害的关键因素,土壤湿度是影响其分布和发生量的因素,土壤有机质含量高,虫口密度大,危害严重。确定了黄老虎、金针虫防治指标分别为每平方米5头和3头。药剂防治表明,以70%吡虫啉、70%噻虫嗪、3%克百威土壤处理、种薯处理效果明显,增产效果27%以上。。

The results of investigating in field showed that the main soil insects of potato in Hexi irrigated area were Agrotis segetum and Pleonomus canaliculatus.Agrotis segetum overwintered as pupa in soil and had 2 generations a year in Hexi.The larva fed seriously during middle June and caused serious damage in spring and autumn,especially in spring.Pleonomus canaliculatus damaged as larva and caused serious damage during late May and late July.The main factor on vertical moving in layer of soil and damaging of ...