H. R. MEENA, O. P. AMETA, B. S. RANA AND K. C. SHARMA

An experiment was conducted under laboratory conditions in the Department of Entomology, Rajasthan College of Agriculture, Udaipur during, 2010 to 2011 with a view to study the biology of C. cephalonica on different hosts  maize, sorghum, rice, wheat, pearlmillet, oat and groundnut). The results revealed that minimum hatching (4.25 days) and  larval period (32.50) days was recorded on pearl millet and maize, while maximum hatching (5.5 days) and larval period  (45.25 days) was recorded on oat. The maximum larval (52.25 mg) and pupal weight (38.50 mg) was recorded on pearl  illet, while, minimum larval (38.50 mg) and pupal weight (32.00 mg) were recorded on oats. The maximum adult emergence was recorded on pearlmillet (79.00%) and minimum on groundnut (65.00%). The Growth Rate Index was maximum  on pearlmillet (1.71) and minimum on groundnut (1.07). The highest fecundity (302.50 eggs/female) was recorded on maize and minimum on groundnut (225.50 eggs/female). The maximum longevity period of female (7.25 days) was recorded  on wheat and minimum on sorghum (4.50 days); whereas, the maximum adult male longevity was (10.25 days) recorded on pearlmillet and minimum on sorghum (8.00 days). The minimum developmental period was recorded on  pearlmillet (46.25 days) and maximum on oats (61.25 days).