Population Dynamics of Gram Pod Borer (Helicoverpa armigera Hubner, 1805) and its Larval Parasitoid (Campoletis chlorideae Uchida, 1957) on Chickpea

Abstract

The present investigation was carried out to study the population dynamics of gram pod borer (Helicoverpa armigera Hubner, 1805) and its larval parasitoid (Campoletis chlorideae, Uchida, 1957) on chickpea during the Rabi season 2020-21 at College of Agriculture, JNKVV, Tikamgarh (M.P.). The egg and larval population of gram pod borer (Helicoverpa armigera) were first observed on vegetative stages at 49th SW (i.e. 3rd to 9th December) and 50th SW (i.e. 10th to 16th December), respectively and were available till the maturity of crop with two peaks i.e. first and second peak at 3rd SW and at 9th SW, respectively. The result of correlation studies revealed that both number of eggs and larval populations were found significant positive correlation with maximum temperature and evaporation. While, both of these egg numbers and larval populations were found to be significant negative correlation with morning RH. The larval parasitoid population (C. chlorideae) first appeared at vegetative stage of the crop at 51st SW (i.e. 17th to 23rd December) (0.20 parasitoid/mrl) with two peak points first at 3rd SW and second at 6th SW. The result of correlation studies revealed that the larval parasitoid population found significant positive correlation with morning RH, whereas it was exhibited significant negative correlation with maximum and minimum temperature and evaporation, respectively.