冀西北地区十字花科蔬菜害虫发生特点与防治技术

Occurrence Characteristics and Control Techniques of Cruciferous Vegetables Pest in Northwest Hebei

对冀西北地区十字花科(Cruciferous)蔬菜害虫种类及发生特点进行调查。结果表明,害虫的发生与温度、湿度关系密切;春秋两季温湿度适宜,害虫发生量较大,夏季高温多雨害虫发生受到抑制,发生量较少;黄曲条跳甲(Phyllotreta striolata Fabricius)春秋两季为害均严重;桃蚜(Myzus persicae Sulzer)春季为害严重,萝卜蚜(Lipaphis erysimi Kaltenbach)秋季为害严重;菜青虫(Pieris rapae)与小菜蛾(Plutella xylostella)均表现为春秋两个为害高峰。

Cruciferous vegetables pest species and occurrence characteristics were investigated in the northwest of Hebei province.The results showed that the occurrence of insect pests was closely related to seasonal temperature and humidity;the occurrence of insect pests was larger in spring and autumn with appropriate temperature and humidity;however,pests were inhibited at hot and rainy summer;Phyllotreta striolata Fabricius caused severe damage at spring and autumn while;Myzus persicae Sulzer in spring and Lipaphis erysimi（Kaltenbach） in autumn;two peaks of damage were caused by Pieris rapae and Plutella xylostella in spring and autumn.