In vivo use of streptomycin sulfate for bacterial disease control in Antheraea assamensis Helfer through leaf freshness technique

摘要

 Among all biotic and abiotic constrains in Muga silkworm culture, disease is the most consistent and devastating one. Bacterial flacherie is such a silkworm disease that inflects more than 42% crop loss. Antibacterial drugs like streptomycin sulfate can be used successfully through leaf freshness technique useable in indoor rearing of Muga culture. Drug solution is mixed with leaf sap as absorbent by Som plant twigs that larvae feed on and, targeted disease causing bacteria in larval gut are exposed to streptomycin action. In vivo use of streptomycin sulfate resulted complete control of flacherie disease caused by Bacillus bacteria up to fourth instars. Being bacteria free in gut, larval feeding was more that was directly reflected in larval body weight and indirectly increases vurvivality of larvae. In this experiment with in vivo use of streptomycin sulfate 42% more survivality up to fifth instars of Muga larvae was achieved over 92% mortality in control rearing