SAPNA, LEKHA, HEMANT SWAMI AND H. K. JAIN

A field trial was conducted to estimate the losses caused by insect pests of sorghum at the Instructional Farm, Rajasthan College of Agriculture, MPUAT, Udaipur, during Khan! 2015. The insect-pest infestation adversely affected the plant height and other yield attributing characters. In the protected plots the mean plant height was 238.96cm, test weight of 1000 sorghum grains was 32.75g, grain yield per plant was 72.55g and grain yield per plot was 4.82kg; whereas, the corresponding figures in unprotected plots were 225.71cm, 28.34g, 62.25g and 4.15kg, respectively. The insect pests caused significant reduction in mean height of plant (5.53%), test weight of 1000 sorghum grains (13.41%), mean grain yield per plant (14.19%) and grain yield per plot (13.89%) in unprotected plots, which was equivalent to a loss of 4.13 q