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SciTech
Bed disinfectants for silkworm rearing
MULBERRY SILKWORM (Bombix Mori) is affected by a large number of diseases caused by various groups of organisms. These diseases are known to occur everywhere almost frequently in almost all silkworm rearing areas of the world.
In addition to various preventive measures taken by local bodies , certain bed disinfectants can be used to avoid contamination and further spread of the diseases.
Paraformaldehyde and benzoic acid compounds are known to contain anti-microbial properties and various formulations involving these chemicals have been prepared like papazol in Japan and Reshan keet oushadh (RKO) in India.
The latter is a bed disinfectant formulation containing one part capton/ dithane-M-45, two parts of paraformaldehyde, one part of benzoic acid and 96 parts of slaked lime powder giving dual protection against grassarie and muscardine.
It should be dusted on the silkworm bed with the help of a thin cloth at the rate of 2-3 and 3-4 g/0.1 sq.m. area respectively for early and late instar silkworms.
The dusting should be done preferably once after each moult, half an hour before resumption of feed. An additional dusting should be given on the fourth day of fifth instar after bed cleaning.
The dusting should not be done when larvae are at moult or preparing for moult. The quantity of RKO required for 100 disease-free layings is 3.0-3.5 kgs.
J. Ashoka &
P. R. Badari Prasad
Regional Research Station,
UAS Campus,
Raichur 584 101
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