Abstract

Among silkworm diseases, white muscardine is the most virulent and contagious disease caused by the fungus, Beauveria bassiana. In the present study, 30 aqueous extracts of plant products were tested in vitro against Beauveria bassiana. Of them, Garlic (Allium sativum) bulb, Ginger (Zingiber officinale) rhizome, Turmeric (Curcuma longa) rhizome, Cardamom (Elettaria cardamomum) seeds, Safed AK (Calotropis procera) leaves, Walnut (Juglans regia) epicarp and Pumba chalan (Rheum australe) root were found effective in inhibiting the conidial germination and vegetative mycelial growth of Beauveria bassiana at 1% concentration in 30 minutes duration. Safed Ak (Calotropis procera) and Walnut (Juglans regia) were found effective at 0.5% - 1.0% in 30 minutes duration

Keywords: Plant products, Beauveria bassiana, in vitro effects.