Vol. 10, Special Issue 11 (2021)

Author(s):
Anubhav Galav, Prateek Sharma, Deepak Kumar Dadhich and Vijay Gautam

Abstract:
To study the impact of seasonal incidence of Helicoverpa armigera on chickpea, a study was carried out in the agriculture research farm of Career Point University, Kota during rabi season 2019-20. The whole experiment was laid out in four plots, measuring 3.0m x 3.0m with row to row and plant to plant spacing of 30 cm and 10 cm. Randomized block design with 3 replications with variety GNG-1958 was used. Pest population of (Helicoverpa armigera) was recorded at each meteorological weak, from germination to harvest of crop, and observation was taken weekly on ten plants randomly by counting the number of larvae on each plot plants in early morning hours without any insecticidal treatment. It was concluded that the first appearance of gram pod borer (Helicoverpa armigera) was noticed in the second week of January. The crop received a peak population of pod borers during the third week of February. The positive association with the population of gram pod borer was determined with minimum temperature and bright sunshine while maximum temperature and morning relative humidity negatively showed non-significant correlation respectively. Though the influence of evening relative humidity was also non-significant on the H. armigera population, it was positive. Further, rainfall showed a non-significant and negative correlation with the pest activity.