小菜蛾在春茬甘蓝上的分布及其防治研究  

Distribution of the diamondback moth,Plutella xylostella,at different cabbage growth stages and its control during spring season

作　　者：吴青君[1] 朱国仁[1] 徐宝云[1] 张友军[1] 

机构地区：[1]中国农业科学院蔬菜花卉研究所,北京100081

出　　处：《植物保护》2011年第2期162-166,共5页Plant Protection

基　　金：农业行业科技专项(200803001);国家自然科学基金项目(30771431)

摘　　要：系统调查了小菜蛾在春茬甘蓝不同生育期的分布规律。结果表明，在甘蓝莲座期，小菜蛾的卵主要产在甘蓝近地面的茎部、叶柄和叶背等比较隐蔽的部位，包心初期，大量的小菜蛾幼虫集中在甘蓝的心叶进行为害，进入包心后期，小菜蛾主要在甘蓝的内叶为害，进入收获初期，小菜蛾转移到外叶为害。据此，甘蓝的包心初期和后期是对小菜蛾进行防治的两个重点时期，结合科学合理施药，在甘蓝的整个生长季节施药2～3次即可有效控制小菜蛾的为害。The distribution pattern of the diamondback moth （DBM）, Plutella xylostella, at different cabbage growth stages was investigated during spring season. The DBM laid most of her eggs on relatively cryptic parts of cabbage, such as stems adjacent to the ground, leafstalks and downside leaves at rosette growth stage. At the ini- tial head formation stage, a large number of DBM larvae were concentrated on the heart leaves. At the late head formation stage, larvae of the DBM were present and caused damage to inner leaves. The DBM shifted to outer leaves at the early harvest time. According to the distribution pattern, the two important stages for control of the DBM were initial head formation stage and late head formation stage. Combined with scientifically sprayed insecticides, 2 or 3 sprays were enough for effective control of the DBM during the whole cabbage growth stage in the spring season.

关 键 词：小菜蛾 甘蓝 分布 防治 

分 类 号：S436.341.24[农业科学—农业昆虫与害虫防治]