Varietal Susceptibility and Assessment of Losses Caused by Pulse Beetle Callosobruchus Chinensis (L.) in Green Gram Under Laboratory Conditions

Abstract

The susceptibility of six green gram (Vigna radiata W.) varieties and quantitative losses due to pulse beetle, Callosobruchus chinensis L., were studied under laboratory conditions. No green gram varieties were found immune. They showed different magnitude of weight loss. The lowest weight loss was observed in variety HUM-12, HUM-1 with 30.20, 31.83, respectively and lowest percent germination loss was observed in variety HUM-2, HUM-16 with 2.50, 2.70, respectively. The mean seed damage and weight loss was 8.98 and 8.26 per cent, respectively after 30 days. This was increased with the storage duration resulting in 99.99 and 48.62 per cent, respectively after 120 days of storage. The population of pulse beetle and Percent germination losses was increases with increasing storage duration.

Keywords

• green gram
• pulse beetle
• quantitative losses
• seed damage and weight loss