Evaluation of cassava varieties for eri silkworm, Samia cynthia ricini Boisduval

Abstract : 

Seven popular Indian cassava varieties namely CO2, CO3, CO (TP) 4, H165, H226, Mulluvadi (MVD1) and Kunguma Rose were screened for rearing of eri silkworm, Samia cynthia ricini Boisduval for effective utilization in eri silk production. The variety MVD1 recorded highest values of essential nutrients viz. protein, total carbohydrate, nitrogen, phosphorus, potassium and total minerals which was closely followed by H226 whereas CO2 exhibited least values. With respect to anti- nutrients, highest content of total tannins and HCN were recorded with the variety CO2 and it was least in MVD1. The variety MVD1 registered superior economic traits of eri silkworm followed by H226 while CO2 was noted as poor performer. All the nutrients exhibited positive correlation with economic traits except that of larval period which was decreased with increase in nutritional content of leaves while it was vice versa in case of anti nutrients. The order of merit of cassava varieties suitable for ericulture was recorded as MVD1 > H226 > CO (TP) 4 > CO3 > Kunguma Rose > H165 > CO2


Keyword : 

Cassava varieties, biochemical compositions, eri silkworm, Samia cynthia ricini, economic traits


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