BEAUVERIA BASSIANA AS OVIPOSITIONAL DETERRENT TO ORIENTAL FRUIT FLY, BACTROCERA DORSALIS HENDEL (DIPTERA: TEPHRITIDAE)C.C. Sachin, M. Thippaiah, S.D. Pradeepa and G.P. Mutthuraju
The horticultural crops suffer a major economic loss from fruit flies belonging to genus Bactrocera spp. across South and south East Asia. Bactrocera dorsalis being the most destructive species among all the flies in this genus needs special focus and effective management strategies. The entomopathogenic fungus has been emerging as potential tool in IPM for many agriculturally important pests. Reduction of egg laying by female fruit flies can be an effective technique which will lead to large reduction in population and less damage. Entomopathogens like Beauveria bassiana has a repellent effect on the fruit flies barring them from oviposition on treated fruits. An oil based formulation of this pathogen can be much more effective owing to the synergy between the active and inert ingredient. An oil based formulation of 10% Beauveria bassiana Myco-Jaal is evaluated in the present studies. In laboratory studies the highest dose of 6mL/L could reduce the emergence upto 98.7% from the infested fruits. The efficacy of formulated spores is found to be equal to that of unformulated spores hence establishing the potency of the formulation Myco-Jaal. In field it was found that a dose of 5ml/L provides a cost effective solution to the grower reducing the infestation upto 85.5% over the untreated control. A comparison of dip method of treatment with spray application establishes that there is no loss of spores due to drift in spray method hence can be used as method of application.
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