冀西北高寒地区不同品种甘蓝抗虫性比较

Insect-resistance Comparison of Four Varieties of Cabbage in the Northwest Hebei

[目的]比较冀西北高寒地区4个品种甘蓝的抗虫性。[方法]采用5点取样法,对冀西北高寒地区4种甘蓝田的小菜蛾、菜蚜、黄曲条跳甲3种主要害虫进行了调查。[结果]小菜蛾发生较早,且在甘蓝生长前期为害重于后期;菜蚜发生量在甘蓝生长后期急剧增长,而黄条跳甲的发生量始终呈平稳增长。在甘蓝整个生长期内受小菜蛾和菜蚜为害较重。[结论]4个甘蓝品种抗虫性由大到小依次为秋丰、晚丰、北京四季、中甘8号。

[Objective] To compare resistance of the four species cabbage.[Method] With the five point survey method in this experiment,dynamics of Plutella xylostella,Lipaphis erysimi（Kaltenbach） and Phyllotreta striolata （Fabricius） were studied at four varieties of cabbage in the northwest of Hebei Province where is arctic-alpine.[Result] The results showed that Plutella xylostella occurred earlier,and caused more serious damage in earlier stage than in later stage; Lipaphis erysimi（Kaltenbach） increased rapidly in later stage; Phyllotreta striolata （Fabricius） increased steadily from beginning to end.During growth period,and the cabbage is strongly influenced by Plutella xylostella and Lipaphis erysimi（Kaltenbach）.[Conclusion] Accroding to the numbers of pest,the capability from strong to weak of insect resistance for four cabbage is Qiufeng,Wanfeng,Beijing four seasons and zhonggan No.8.