Abstract
The increased fitness and virus transmission by the whitefly, Bemisia tabaci is attributed to association of bacterial endosymbiont. In this study, an attempt was made to identify dominant gut bacteria associated with the growth stages in Asia I and Asia II-1 genetic groups of B. tabaci and to quantify the gut bacterial diversity. The gut bacteria were isolated from egg, nymphal instars and adult and generic identification was done for morphologically distinct colonies. Bacillus spp. was found to be the most predominant isolate across the developmental stages. The diversity analysis revealed that Asia II-1 recorded significantly higher species richness than in Asia I as reflected by the respective Shannon Wiener indices values of 3.13 and 2.41. Diversity analysis across the developmental stages showed that 2nd and 3rd instars were having highest diversity of gut bacteria in Asia II-1 and Asia I genetic groups, respectively. Understanding of the bacterial communities in different populations of this devastating pest may pave way for developing a sustainable strategy for its management.
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