石家庄地区甜菜夜蛾的发生及防治

采用高效低毒的化学农药杀灭甜菜夜蛾幼虫,通过在田间进行单剂、混剂不同组合的试验并将优选组合用于生产。结果表明:混剂效果优于单剂;打药时间应在傍晚开始为宜,严重地区可夜间打药。打药方法应掌握采用大药量、药液必须触及虫体方能奏效。

Occurrence and Control of Spoptera exigua in Shijiazhuang Area

Spoptera exigua grub control by using high efficiency and low-toxic chemical pesticide was discussed.Through the experiments,the single-dose pesticide was compared with the mixture,and the optimized dosages were applied in the field.The experiments illustrated that,mixture was better than single-dose pesticide.It was appropriate to spray at dusk.For the serious insect pest areas,spray at night was suggested.In order to control pest efficiently,high-dosage and spraying the pesticide directly on the pests were recommended.