B和Q型烟粉虱种群竞争与抗药性的关系  

Competition between the B and Q biotypes of Bemisia tabaci and its relevance to insecticide resistance

作　　者：武淑文[1] 王震宇[1] 吴益东[1] 

机构地区：[1]南京农业大学植物保护学院昆虫学系农业部作物病虫害监测与防控重点开放实验室,南京210095

出　　处：《昆虫知识》2010年第6期1118-1122,共5页Entomological Knowledge

基　　金：973课题(2006CB102003)

摘　　要：在室内用棉花植株饲养情况下,对采自浙江杭州的烟粉虱Bemisia tabaci(Gennadius)B型和Q型混合种群的生物型组成以及抗药性水平进行了多代的监测。在室内饲养的F0代,两种生物型比例相当;在F10代,Q型已经完全被B型所取代。与F0代相比,F10代烟粉虱种群对吡虫啉、阿维菌素和氟虫腈的抗性水平明显下降,而对α-氯氰聚酯的抗性保持稳定。该研究表明:在没有杀虫剂选择压力的室内条件下,B型比Q型更具生存优势。然而在烟碱类杀虫剂广泛使用的田间条件下,烟粉虱Q型因比B型对烟碱类杀虫剂具有更强的抗性而获得竞争优势。The insecticide resistance of specimens of a mixed population of the B and Q biotypes of Bemisiatabaci （Gennadius） collected in Hangzhou,Zhejiang Province,was monitored for several generations. Whenthe population was reared on cotton without insecticides for 10 generations,the proportion of B-type to Q-type individuals in the F0 population was similar,however the B-type completely replaced the Q-type in theF10 population. Resistance to imidacloprid,abamectin and fipronil in the F10 population was significantly reduced compared with the F0 population,but resistance to α-cypermethrin was similar between the F0 andF10 populations. These results indicate that the B-type is competitively superior to the Q-type in the absence of insecticide selection pressure under laboratory conditions. However,the Q-type is competitively superior infield conditions where neonicotinoids are widely used,presumably because it has greater potential to developres istance to neonicotinoids than the B-type.

关 键 词：烟粉虱 生物型 种群竞争 

分 类 号：S433[农业科学—农业昆虫与害虫防治]