EFFECT OF FEED QUANTUM DURING 5TH INSTAR OF SILKWORM, BOMBYX MORI L. ON ECONOMIC PARAMETERS
BHADRAM BORA *
DIRECTORATE OF SERICULTURE, GOVT OF ASSAM, INDIA.
T.S. MAHADEVAMURTHY *
CENTRAL SERICULTURAL RESEARCH ANDTRAINING INSTITUTE, MYSORE-570008, INDIA.
G.R. SHIVAKUMAR *
CENTRAL SERICULTURAL RESEARCH ANDTRAINING INSTITUTE, MYSORE-570008, INDIA
S.B. MAGADUM *
CENTRAL SERICULTURAL RESEARCH ANDTRAINING INSTITUTE, MYSORE-570008, INDIA.
*Author to whom correspondence should be addressed.
Abstract
The effect of differentfeed quantum (18 to 32 feeds) during 5th instar of PMX NB4D2 and NB4D2x NB7 was studied. The larvae have been starved after 16 feeds (4th day) during 5th instar are unable to spin cocoons. The larvae starved after 18 feed spunlighter cocoons but the quantity and quality of the cocoons were inferior when compared to 32 feeding level. High melting percentage was observed in 18-20 feeding level. The effect of differentfeed quantum is discussed in relation to the growth and economic parameters in the present study.