陕西地区烟粉虱生物型的鉴定及其危害分析

摘要

To evaluate main biotypes and damage of Bemisia tabaci( Gennadius)in Shaanxi area,we analyzed the ex-tent of damage through investigation and identified the variety of biotypes in Shaanxi main host plants by mtDNA COI sequences of Bemisia tabaci. The sequence analysis results indicated that the B and Q biotypes B. tabaci co-existed in Shaanxi area,and B biotype B. tabaci was 78. 85%. The results showed that B biotype still was the main biotype ,but Q biotype spreads widely in Shaanxi area and may replace B biotype as a major crop pest in Shaanxi ar-ea. B. tabaci damaged crops seriously such as tobacco,sweet pepper,tomato of solanaceae and cucumber,pumpkin of cucurbitaceae. But the plants of cruciferae were damaged lightly,and damagous to potato of solanaceae and cow-pea,peas of leguminosae were lightest.%为探明陕西地区烟粉虱的危害及主要生物型,实地调查了陕西地区主要农作物上烟粉虱的危害状况与发生程度,并利用mtDNACOI基因测序方法,对陕西地区烟粉虱的生物型组成进行了分析鉴定.同源性分析结果表明,B型和Q型烟粉虱是陕西地区烟粉虱种群的主要生物型,其中B型占所测总样本的78. 85%,表明陕西省烟粉虱主要生物型仍是B型,但Q型种群比例在增长,不排除有取代B型成为陕西地区烟粉虱主要危害类型的趋势.在陕西地区烟粉虱主要危害的植物是茄科的烟草、甜椒、番茄以及葫芦科的黄瓜、西葫芦,而十字花科植物普遍受害较轻,茄科的马铃薯和豆科的豇豆、豌豆受害最轻.