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
武淑文 王震宇 吴益东
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作者单位：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
中文关键词：烟粉虱， 生物型， 种群竞争
英文关键词：Key words Bemisia tabaci， biotype， population competition
中文摘要： 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
英文摘要： The insecticide resistance of specimens of a mixed population of the B and Q biotypes of Bemisia tabaci (Gennadius) collected in Hangzhou, Zhejiang Province, was monitored for several generations. When the 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 the F10 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 and F10 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 in field conditions where neonicotinoids are widely used, presumably because it has greater potential to develop resistance to neonicotinoids than the B-type.