Vol. 11, Special Issue 4 (2022)

Author(s):
Rakesh Shivhare, UC Singh, Naveen, Kanchan Baghla and Neeraj Kumar

Abstract:
The present study was conducted at the entomological research field, College of Agriculture, RVSKVV, Gwalior, Madhya Pradesh during the Kharif season of 2019-2020. The sorghum crop was sown with CSV-13 variety by following recommended agronomic practices and fertilizer application with 45 cm row to row and 15 cm plant to plant spacing. The results revealed that A. biguttula biguttula was first observed when the crop age was about 18 days old as in 30^th SMW while its peak incidence was seen during 12WAS i.e., 38^th SMW with 41 jassids (nymph/adult per leaf) per plant, however, this shows significant positive correlation (r = 0.642, 0.643 and 0.701, respectively) with morning and evening relative humidity and rainfall. Further, R. maidis was first recorded during the 31^st SMW when the crop age was 26 days old and showed peak incidence during 37^th SMW with 54 aphids per leaf. This was found to be significantly positively correlated (r = 0.630, 0.562 and 0.601, respectively) with morning and evening relative humidity and rainfall, respectively. A. soccata was first observed on the crop at7 DAS i.e., 28^th SMW with its peak infestation during 29^th SMW with 11.67% dead hearts which showed that maximum temperature and evaporation showed a positive significant correlation (r= 0.771 and 0.595, respectively) and morning relative humidity showed a negative significant correlation (r= -0.612). Finally, C. partellus was first observed at 34 DAS i.e., 33^rd SMW with its peak during 37^th SMW with 23.7% dead hearts (plant infestation). This was found to exhibit a positive significant effect (r = 0.631, 0.544 and 0.645) with morning and evening relative humidity and rainfall, respectively.