ESTIMATION OF EFFICIENT CONCENTERATION OF BAVISTIN IN CONTROLLING MICROSPORIDIASIS AND IMPROVING COCOON CHARACTERS IN ANTHEREAE MYLITTA DRURY (ANDHRA LOCAL ECORACE)
Microsporidiosis(Pebrine) is one of the dreadful disease seen in tropical tasar silkworm Antheraea mylitta.Drury (Andhra local ecorace), caused by Nosema species. Infections of the disease found to be highly virulent and harm the cocoon characters. Therefore an attempt has been made to evaluate the efficient dosage concenteration of Bavistin in controlling the disease through studies on cocoon characters and hemocyte count in the fifth instar larvae. The results reveal a significant increase in shell weight, cocoon weight, filament length, reelability, reeled silk weight and denier in B1 batch cocoons (0.005%Bavistin Treatment) than B2(0.04% Bavistin Treatment), B3(0.02% Bavistin Treatment) and B4(0.01% Bavistin Treatment) batches respectively in comparison with infected control. In comparison with the healthy control, the hemocyte count in B1 batch larvae (14802±143.56) were almost same but, found to be high in B2 (14903±148.16),B3 (14928±153.18)and B4 batches (14932±168.21)respectively. Based on the results obtained from present study 0.05% Bavistin is found efficient in controlling microsporidiasis in Andhra local ecorace.