Survey on major insect pests of groundnut in Southern Telangana zone

Abstract

Survey on major insect pests of groundnut was carried out in Southern Telangana Zone comprising of the three districts viz., Mahabubnagar, Nagarkurnool and Wanaparthy at three stages of crop growth period viz., vegetative, pod formation and maturity stages for identification of pest scenario. In all the three districts the mean percent damage per plant (14.50-18.85%) and mean no. of larva per plant (0.90-1.05) of tobacco caterpillar were comparatively higher at pod formation stage while percent infested plants were more during maturity stage (38.60-40.30%). With respect to gram caterpillar, the mean percent damage per plant (2.90-3.60%) and mean percent infested plants (12.80-18.50%) was higher at maturity stage while in case of the leaf miner mean percent mining per plant (1.75-3.10%) was more at vegetative stage while mean percent infested plants (7.80-9.50%) was greater at pod formation stage. The mean no. of sucking pests viz., leafhoppers and thrips were recorded to be higher during pod formation stage (2.37-2.47 and 3.92-4.02, respectively).

Effect of Weather Parameters on of Pests and Diseases in Groundnut and Castor in Salem District of Tamil Nadu, India

“…The whiteflies incidence in castor was positively correlated with temperature (0.490967) and rainfall (0.389125) where as lepidopteran pest, S. litura by relative humidity (0.61212) and rainfall (0.49415). The results were in accordance with the findings of Jayanthi et al [6], Ratnapara et al [7], Ruba and Padmapriya [8] and Rahman, et al [9]. The thrips and rot was influenced by relative humidity (0.570641 and 0.469101), but blight was not have any correlation with weather parameters (Table 2).…”