Estimation of avoidable yield losses caused by Helicoverpa armigera (Hubner) on chickpea
K Dinesh, S Anusha, R Bharu Singh and NL Dangi
Experiment was carried out to evaluate the yield losses caused by Helicoverpa armigera (Hubner) infesting chickpea at RCA, MPUAT, Udaipur during 2013-14 and 2014-15. The loss estimation due to insect pests on chickpea showed that mean plant height under treated condition was 1.10 and 1.11 times more than when unprotected; likewise, the mean number of pods was 1.25 and 1.32 times more when the crop was protected. Mean number of damaged pods was 5.44 and 5.12 times more and the mean percent pod damage was 6.76 and 6.86 times more under unprotected condition. Similarly,the mean seed per pod was 1.68 and 1.70 times more in protected plot than when left unprotected. Mean yield /plant (g) and mean yield/plot (g) were 2.09 and 2.19 and 1.43 and 1.45 times more when the crop was kept protected. On the basis of yield, an avoidable loss of 29.93 and 31.28 per cent was recorded due to H. armigera infestation in chickpea variety GNG 1581.