Whitefly’s (Bemisia tabaci) biotypes: Phylogenetic, Morphology and efficient as a vector of TYLCV in Syria
Ahmad M. Mouhanna
International Conference Climate Change, Biodiversity and Sustainable Agriculture (Iccbsa-2018), Dec 13th -16th, 2018
Over the past years, Bemisia tabaci have been studied in Syria. Recently results showed the existence of four biotypes common in Syria, nonB biotype at greenhouse, Q and B biotypes at Fields (<400m), and M biotype at mountains (400-1200m). Bootstrap value obtained by mtCOI technique was between 59-100%. A biotypes were characterized morphologically. There was insignificant difference between (M&Q) or (B&nonB) biotypes. whereas M biotype prevailed on B and nonB biotypes in most morphometric parameters. Margin Body was crenulated at local biotypes (M, Q, B & nonB), and the same for Operculum visaform which was semicircular. Local biotypes were arranged according to morphometric parameters as follows; M > Q > B = nonB. The results also showed that B biotype, in field conditions, is dominant when compared with other biotypes, with an infection percentage 88% and a disease severity 92%, and it was the most efficient biotype tested in the transmission of TYLCV under field conditions. While under greenhouse conditions, the non-B biotype was the most efficient in transmitting the virus with an infection percentage 92% and a disease severity 94%. Whereas M biotype demonstrated to be less efficient for virus transmission in both environments with infection percentage 44% and disease severity less than 56% in the greenhouse environment.