Incidence and severity of insect pests of Okra in relation to abiotic factors

The maximum population of Amrasca devastans was recorded 23.7/3 leaves at 40 Standard Week (SW) when the temperature ranged between 26–35°C and RH 49–78% during 2014 and 23.7/3 leaves. At 39 SW when the temperature ranged between 27–35°C and RH 51.09% during 2015. The maximum population of Bemisia tabaci was recorded 6.10/3 leaves at 37 SW at a temperature ranged between 27–33.4°C and RH 45–85% and 6.80/3 leaves and at 38 SW at a temperature ranged between 2634.2°C and RH of 55–81% during 2015. The maximum infestation of Earias vittella larvae was observed (41.1%) in 40 SW or 3^rd week of September during 2014 while it was (42.8%) in 41 SW or 1^st week of October during 2015 season. The population of A. devastans and B. tabaci showed negative significant correlation with maximum temperature, R.H._morng and R.H._evng during both the season. Rainfall showed positive correlation during 2014 while negative correlation during 2015. Wind speed showed positive non-significant correlation during 2014 while during 2015 it showed negative non-significant correlation with the population of A. devastans whereas wind speed showed negative non-significant correlation during both the season with the population of B. tabaci. The % of fruit infestation due to E. vitella showed negative significant correlation with maximum and minimum temperature, R.H._morng and R.H._evng. Rainfall and wind speed showed positive significant correlation during 2014 and negative significant correlation during 2015.