Vol. 9, Issue 12 (2020)

Author(s):
Devan SR, Dr. Vijayakumar Rathod, Dr. CN Hanchinamani, Dr. Kantharaju V, Sandhyrani Nishani and Lakshmidevamma TN

Abstract:
The yard long bean although is a subspecies of cowpea used both in the form of raw as well as cooked. It is now getting more popular in non-traditional areas like Bangalore, Chennai, Mumbai, Haryana and New Delhi as an alternative to French bean. There is a demand for higher production of yard long bean but, due to biotic and abiotic factors there is decrease in production. Among biotic factors, web blight is severe damage to the yard long bean. Since, there is no such resistant variety released in yard long bean because of low level of variability in population, so present investigation to evaluate forty yard long bean genotypes against web blight incidence under natural condition was carried out. The forty yard long bean genotypes were placed in randomized complete block design with two replications. The analysis of variance revealed a highly significant difference among genotypes for web blight incidence. The results revealed that the genotype TCR86 had least (5.20) per cent incidence of web blight while EC693340 had highest (43.40) per cent incidence of web blight. The effect of incidence of web blight on pod yield per plot revealed that the lowest yield documented on TCR84 however highest on EC693338 and Arka Mangala. Based on disease scale, genotypes were categorized into three groups viz., highly resistant, moderately resistant and resistant. Further evaluation of these genotypes with least per cent incidence of web blight coupled with higher yield is amenable for plant breeder to develop high yielding resistance genotypes.