不同生态措施对褐稻虱种群及其天敌的影响  

Effect of Different Ecological Control on Population of Brown Planthopper and Its Natural Enemy Community

作　　者：钟平生[1] 梁广文[1] 曾玲[1] 

机构地区：[1]华南农业大学昆虫生态研究室

出　　处：《安徽农业大学学报》2005年第4期428-431,共4页Journal of Anhui Agricultural University

基　　金：国家"973"重大科研项目(G20000162209);国家农业结构调整重大技术研究专项(2002-01-05A);惠州学院博士启动基金(C503.0203)资助

摘　　要：应用田间调查与生物多样性指数,研究了不同生态措施对褐稻虱种群(Nilaparva ta lugensSta°l)的控制作用及其稻田主要天敌的影响。结果表明,稻田放鸭对褐稻虱若虫具有60.92%的控制效果,现代苦楝油200倍对褐稻虱种群的作用优于薇甘菊乙醇提取物(干重)10 g.L-1,不同生态措施组合对褐稻虱自然种群的控制作用显著,但其联合作用效果与组分未成正比例增长。在不同生态控制措施下,蜘蛛、捕食性天敌昆虫与寄生性天敌昆虫的Shonnon-W iener多样性指数与均匀度指数较CK(常规施药)均有不同程度的提高,表明不同生态控制措施及其组合,能显著降低褐稻虱种群的为害,有利于自然天敌的保护利用和恢复稻田生态环境。By using field investigation method and biodiversity index, the effect of different ecological control methods on population of brown planthopper（BPH）, the structure and changes of major natural enemies were evaluated. The results showed that released duck had significant effect against BPH population. It could decreased the number of nymph to 60.92%. The effect of trilogy on BPH was better than that of the extract from Mikania micrantha Kunth. The combination of different ecological control management had obvious effect on BPH population, but the joint control effect had a development out of direct proportion. The Shannon-Wiener Diversity index （H＇） of spider and parasite were increased in a different degree in different ecological management fields and in common pesticide fields. It was concluded that different ecological management was beneficial to natural enemies, fully utilizing natural control effect.

关 键 词：生态控制 褐稻虱 天敌 

分 类 号：S435.112.3[农业科学—农业昆虫与害虫防治]