江苏地区烟粉虱生物型演替研究初报

Preliminary study of succession of Bemisia tabaci biotypes in Jiangsu Province,China

本文连续5年系统监测了江苏省13个地级市烟粉虱Bemisia tabaci(Gennadius)生物型的发生分布状况,探讨了它们的迁移扩散和演替规律。利用RAPD分子标记和mtDNA COI基因序列进行烟粉虱生物型鉴定,结果表明:江苏地区发生的烟粉虱生物型为B型和Q型。自2005年到2009年,B型烟粉虱在苏南和苏北地区的发生分布频率逐年下降,在苏北地区的发生分布频率由52.58%下降为22.22%,在苏南由56.52%下降为9.37%;而Q型烟粉虱在苏南和苏北的发生分布频率逐年升高,在苏北由47.42%上升至77.78%,在苏南由43.48%上升为90.63%。B型烟粉虱的发生分布范围由全省逐渐向苏北地区缩小,而Q型烟粉虱的发生分布范围逐渐扩大遍及全省;此外,Q型烟粉虱在江苏是由苏中和苏南地区向苏北地区扩散,并逐步取代B型烟粉虱成为江苏地区农作物的主要害虫。

The occurrence and distribution of Bemisia tabaci（Gennadius）biotypes in 13 cities in Jiangsu Province was surveyed systematically from 2005 to 2009 and biotypes identified on the basis of RAPD marks and mtDNA COI gene sequence.The results showed that the B.tabaci B and Q biotypes co-exist in Jiangsu Province but that the distribution of the B biotype has decreased while that of the Q biotype has increased.The frequency of the B biotype ranged from 52.58% to 22.22% in Northern Jiangsu and from 56.52% to 9.37% in Southern Jiangsu.The distribution of the Q biotype ranged from 47.42% to 77.78% in Northern Jiangsu and from 43.48% to 90.63% in Southern Jiangsu.The Q biotype has spread from Southern and Central Jiangsu to Northern Jiangsu and has gradually replaced the B biotype as a major crop pest in Jiangsu Province.