author(s)
Senthilraja N and PS Patel

abstract
The performance of 14 cowpeavarieties/genotypes against Callosobruchus maculatus was assessed under the no-choice artificial infestation condition and significant variations were observed. GC 3 was least preferred for egg laying. Significantly less growth index was recorded in GC 4 followed by GC 5. Based on per cent infestation, the varieties/genotypes GC 6, GC 1501 and GC 1601 were classified as highly susceptible and GC 4, GC 5, GC 1304 and GC 1702 as the least susceptible. The weight loss due to feeding by C. maculatus ranged from 5.38 to 15.95 per cent. Growth index had highly significant negative relationship with mean development period and highly significant positive relationship with adult emergence. Adult emergence had a highly significant negative relationship with development period and positive relationship with weight loss. Number of eggs laid by C. maculatus had a negative non significant relationship with adult emergence.