Determination of Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) biotypes and their seasonal population dynamics in cotton growing areas of Adana province

In this study, biotypes and their seasonal population dynamics of Bemisia tabaci (Hemiptera: Aleyrodidae) populations collected from cotton growing areas of Ceyhan, İmamoğlu, Karataş, Seyhan, Tuzla, Yumurtalık and Yüreğir in Adana province, were determined by using Microsatellite Fragment Analysis and PCR-RFLP molecular identification methods. Samples were taken from a total of 102 different cotton fields at early (June), mid (July-August) and late seasons (September), during the year 2015. In addition, in order to determine the effects of insecticide applications to the biotype composition, the pesticide applicated and free cotton fields located in Ceyhan Karataş and Yüreğir were also sampled. As a result, 66% of the total B. tabaci populations were determined as Q biotype while 34% were B biotype. The highest and lowest Q biotype population ratios were determined in İmamoğlu and Tuzla with 100% and 33.3%, respectively. Although the highest B biotype ratio was found to be 66.7% in Tuzla, there was not determined any B biotype in the samples collected from İmamoğlu. Seasonal dynamic of biotypes was changed according to locations and Q biotype was found dominant in the samples from Ceyhan, Seyhan, Karataş ve Yüreğir at the early season. Compared to early season, population of B biotype was increased in towards to late season. According to results of pesticide applicated and free cotton fields there was no important effect of pesticide application to the biotype dynamics of B. tabaci.