Department of Entomology & Agril. Zoology, Institute of Agricultural Sciences, B.H.U., Varanasi – 221 005, India.
*Email: chandra_19572001@yahoo.co.in
Online published on 27 December, 2012.
The test genotypes consisted of five pod fly resistant and five pod fly susceptible genotypes of long duration maturity group. In ovipositional preference study, a strong relationship was recorded between number of eggs laid/plant and the pod and grain damage in the test genotypes. The number of eggs laid/plant by the pod fly on the genotypes PDA 88-2E, PDA 87-3E, PDA 85-5E and MA 3 were significantly less and the % pod and grain damage was also significantly less on these genotypes. In tolerance studies, out of ten test genotypes, MAL 13, MA 6 and MAL 20 gave higher yield in spite of supporting high maggot population of pod fly. Hence, ovipositional preference as well as tolerance mechanism of resistance seems to be operating in these genotypes
Cajanus cajan, Melangromyza obtusa, Ovipositional preference
