Vol. 11, Issue 12 (2022)

Author(s):
SR Thakur, MK Nayak and Shiv Ratan

Abstract:
A field experiment was conducted at AICRP (Sesame) centre, College of Agriculture, JNKVV, Tikamgarh (M.P.) during two consecutive kharif seasons (2015 and 2016) to assess the seasonal incidence of major insect pests of sesame and its correlation with weather parameters. The incidence of Antigastra, Jassid, Mirid bug and white fly were started during from 29^th standard meteorological week (SMW) and continued up to 38th SMW. The highest incidence (0.20 larvae/plant) of Antigastra was recorded in 35th SMW. Incidence of all three sucking pests jassid, whitefly and mired bug were at peak during 33^th, 35^th and 31^th SMW (0.48 jassid, 2.61 white fly and 0.75 mirid bug/plant) respectively.The correlation study revealed that the Antigastra larvae had significantly positive correlation with maximum temperature(r = 0.43) and significantly negative correlation with relative humidity (r = -0.84). While significant and negatively correlated was observed between population buildup of jassid & white fly and maximum temperature(r = -0.70, r = -0.74) while significantly positive correlation with relative humidity (r = 0.86, r = 0.83). Whereas the mirid bug population exhibited Significant correlation with maximum and minimum temperature (r = -0.70, r=-0.74) and significantly negatively correlated with rainfall (r= -0.84). The correlation study between population and weather parameters revealed that the positive correlation with maximum and minimum temperature and negatively correlated with relative humidity and rainfall.