豫西山区烟田节肢动物群落的季节特征(英文)

The seasonal characters of the arthropod community in tobacco field in the mountain area of western Henan

对豫西山区烟田田间系统调查发现 ,1998,1999和 2 0 0 0年该地区烟田的田间节肢动物群落分别有 6 8,5 8和 6 9种 (类 )组成 .其季节特征根据烟草的生育期不同可分为 3个阶段 .捕食和寄生性天敌在数量上构成了控制烟草害虫的优势类群 .多样性分析显示 ,前期较低而后期增加 ,在 6月上中旬多样性、稳定性指数最高 ;对烟草生产影响比较大的害虫有烟蚜。

The arthropod community in the tobacco field in the mountain area of western Henan province consisted of 68 species in 1998, 58 species in 1999 and 69 species in 2000, respectively. The seasonal characters of the community were divided into three phases based on different tobacco growth stages. The predatory and parasitic natural enemies were the dominant populations of the community that controlled tobacco pests. Data analysis showed that the diversities of the community were poorer in earlier stage and richer in later stage of tobacco growth. In the first 10 day and middle 10 day of June, the index of diversity and stability of the community were higher than that in other time, but the evenness reach a peak in the first 10 day and the middle 10 day of June and went down lower later. The harmful species were only green peach aphid, oriental tobacco budworm and cotton bollworm.