Vol. 12, Issue 12 (2023)

Author(s):
Pratiksha Khedkar, Anita Sable, Dayanand More, Dilip Randive and Dipak Gaikwad

Abstract:
The experiments were conducted with an objective to study the fecundity and survival of pulse beetle Callosobruchus chinensis Linnaeus on two chickpea varieties viz. BDN-797 and BDN-9-3 at the Post Graduate Laboratory, Department of Agril. Entomology, College of Agriculture, Latur during 2022-2023. C. chinensis when reared on chickpea variety BDN-797 and BDN-9-3, the survival values of immature stages as 0.71 and 0.55 per individual, respectively within a pivotal age of 31 and 32 days, the net reproductive rate (R₀) of 20.86 and 15.00, females per generation, respectively, the mean length generation time (T) to the extent of 33.75 and 34.71 days, respectively, innate capacity for increase in numbers (r_m) was 0.090 and 0.078 females per female per day, respectively and finite rate of increase in number (λ) was 1.09 and 1.08 females per female, respectively. On BDN-797, stable-age distribution, of C. chinensis in egg, larval-pupal and adult stages was recorded as 60.71, 38.21 and 1.06 percent, respectively, whereas, on BDN-9-3 it was 64.11, 34.97, 0.87 percent, respectively.