菜蚜茧蜂对萝卜蚜的控制作用研究  

Control Lipaphis erysimi(Kaltenbach) with Diaeretiella rapae(McI ntosh)(Hymenoptera:Braconidae),an important parasitoid of aphids

作　　者：杨海林[1] 谷星慧[1] 罗秀莲[1] 杨曜华 张立猛[1] 

机构地区：[1]云南省烟草公司玉溪市公司,云南玉溪653100

出　　处：《环境昆虫学报》2016年第5期1018-1022,共5页Journal of Environmental Entomology

基　　金：云南省烟草公司科技计划项目(2014YN03)

摘　　要：为了明确菜蚜茧蜂对萝卜蚜的控制作用,本文研究了在云南玉溪以6个不同蚜蜂比释放菜蚜茧蜂对萝卜蚜的寄生率,结果表明,按6个不同蚜蜂比释放菜蚜茧蜂寄生萝卜蚜后,其对萝卜蚜的寄生率随时间变化的曲线相似。放蜂后第3天,其对萝卜蚜的寄生率即达4%左右。前12 d寄生率虽有波动,但寄生率较低,多在5%以下,之后寄生率开始逐渐上升。蚜虫数量越多,其寄生率反而越高,21 d时,蚜蜂比250∶1和500∶1的寄生率已达26.06%和24.23%,显著高于其它蚜蜂比。蚜蜂比5∶1和25∶1时,萝卜蚜数量的增长最慢,21 d时,其数量仍呈直线上升趋势。蚜蜂比50∶1和150∶1时,萝卜蚜数量的增长开始呈直线上升趋势,到第18天趋于平稳。而蚜蜂比250∶1和500∶1时,萝卜蚜在第9天后,其种群数量呈爆发式增长,到第15天时即趋于平稳。萝卜蚜数量与有翅蚜数呈线性关系y=0.0097 x+10.953。僵蚜数与有翅蚜数呈指数函数模型,y=9.2582e0.0017 x。本研究表明菜蚜茧蜂对萝卜蚜有一定的控制作用,可以作为生物防治萝卜蚜的选择之一。Diaeretiella rapae（Mc Intosh）,an important parasitoid of aphids,was released at 6 ratios to control turnip aphids in Yuxi city Yunnan Province. The results showed that the parasitism curve was varied similarly among the 6 ratios,and the parasitism were about 4% in the third day,and before the twelfth day,the parasitism were undulated about 5%. Consequently the parasitism were ascended gradually,and in the twenty-first day,the parasitism were 26. 06% and 24. 23% with the ratio of 250 ∶ 1 and 500 ∶ 1（number of aphid：number of parasitoid）. After releasing the natural enemy,the number of aphids was rose slowest with the ratio of 5 ∶ 1 and 25 ∶ 1,the number of pest was straight up in twenty-first days,and with the ratio of 50 ∶ 1 and 150 ∶ 1,the number of pest was straight up firstly and was kept in a stable in eighteenth days,however with the ratio of 250 ∶ 1 and 500 ∶ 1,the pest population was broke out after ninth days,and was kept in a stable in fifteenth day. The relational equation of the total number of aphids and the number of winged aphids was described by y = 0. 0097 x ＋ 10. 953,and the equation of the number of stiff aphids and the number of winged aphids was described by y = 9. 2582e0. 0017 x. The results provided evidence to control L. erysimi by releasing D. rapae.

关 键 词：萝卜蚜 菜蚜茧蜂 生物防治 

分 类 号：Q965[生物学—昆虫学] S476[农业科学—农业昆虫与害虫防治]