南疆地区棉田棉蓟马种群数量动态研究

2002～2004年研究了南疆地区棉田棉蓟马的种群动态及棉花品种的影响.结果表明和以前相比棉蓟马依然是南疆棉花的重要害虫,2002、2003和2004年棉田棉蓟马日最高密度分别为5 328、3 033和3 383头/百株.对转基因抗虫棉GK19(表达Cry1A杀虫蛋白)、SGK321(表达Cry1A+CpTI杀虫蛋白)和普通棉花泗棉3号、石远321的研究表明棉蓟马在不同品种上的季节性数量动态没有显著差异.

Studies on Population Density Dynamic of Onion Thrips in Cotton Field in the South of Xinjiang

Population dynamics of onion thrips,Thrips tabaci Lindeman in cotton fields and influences from cotton-varieties were studied from 2002 to 2004 in the south of Xinjiang,an intensive planting area of cotton in recent years in China.Results showed that comparing with the years of 1950 s to 1990 s,T. tabaci was still a major pest to cotton crop.The highest population densities of T.tabaci reached 5 328,3 033,3 383 per 100 plants in 2002,2003,2004,respectively.The systematic investigation on population dynamics in different varieties of cotton,including two Bt cotton lines,GK19(expressing Cry1A insecticidal toxic protein) and SGK321(expressing Cry1A CpTI insecticidal toxic proteins),and two conventional cottons(Simian3 and Shiyuan321),indicated that there were no significant differences in thrips density among them.