International Journal of Advanced Scientific Research and Management, Special Issue I, Jan 2018. www.ijasrm.com ISSN 2455-6378 121 Impact of Weather Parameters on Population fluctuation of Helicoverpa armigera (H) on Chickpea Anubhav Galav 1 , A.K. Bhowmick 2 , Neeshu Joshi 1 , KK Singh 1 , Vinod Mehta 3 , and Shrinath Sharma 1 1 School of Agricultural Sciences, Career Point University, Kota, Rajasthan, India 2 JNKVV, AICRP on Chickpea (Lead Centre), Jabalapur, India 3 Junagad Agriculture University, Gujarat, India Abstract To study the role of weather parameters on population fluctuation of Helicoverpa armigera on chick pea, a study was carried out in the plant breeding farm of AICRP on chickpea (lead center) ICAR at JNKVV Campus during rabi season 2013- 14. Randomizes complete block design with 3 replications with genotype Subhra was used. Pest population of (Helicopverpa armigera) was recorded at each meteorological weak, from one week after germination to harvest of crop and observation was taken twice in a weak by counting the no. of larvae on plants in one meter row length at five random places in each plot without any insecticidal treatment. It was concluded that first appearance of gram pod borer (Helicoverpa armigera) was noticed in fourth week of December. The crop received first peak of population of pod borer during third week of February in flowering phase, while the another peak of intensity was recorded in second week of April during reproductive phase of the crop. The positive and negative association with the population of gram pod borer was determined with temperature and relative humidity respectively Sunshine had positive impact on the multiplication of this pest, while the wind velocity had positive non significant effect, and rainfall had non- significant negative association. Keywords:, Helicoverpa armigera, chickpea, gram pod borer 1. Introduction Chickpeas (Cicer arietinum L.) are one of the oldest and most widely consumed legumes in the world, particularly in tropical and subtropical areas. It is also called as Ceci bean, Bengal gram, Garbanzo bean, Chana and Sanagalu bean. Chickpea is a versatile crop that is grown in almost every part of globe today. India is the largest producer of chickpea followed by Pakistan, Turkey and Iran. In fact, about 70% of total world production of chickpeas is dominated by India (Anonymous, 2012). India occupies first position in the world in terms of area (66%) and production (70%). The crop occupies 9.01 million hectare area with production of 7.58 million tonnes and 911 kg/ha productivity. Abiotic and biotic stresses are the major constraints in enhancing the productivity of chickpea in India. Insect – pests and diseases are biotic bottlenecks in realizing its potential yield. Chickpea faces the attack of more than 60 insect- pests right from germination to maturity and also in storage (Shrivastava, 2003). In chickpea on an average about 30-40% pods were found to be damaged by the pod borer resulting in the yield loss of 400 Kg/ha ( Rahman, 1990 ) under favourable weather condition the damage to pods could increase upto 90-95%. Helicoverpa armigera (Hubner) generally known as legume pod borer, is one of the most impostant constraint to crop production globally. It si polyphagous and attacks more than 182 plant species. Among the various pulses, chickpea is one of the important leguminous crop. In India pulses are grown in an area of 23.47 mha with total production of 18.45 with productivity of 786 kg/ha. 2. Materials and Methods An experiment was conducted at Plant Breeding farm of AICRP in Chickpea (Lead Center) ICAR at JNKVV campus during rabi 2013-14 to check the role of weather parameters on