Dr. H. P. PatelMayur G. Borad2020-06-302020-06-302018http://krishikosh.egranth.ac.in/handle/1/5810148288Investigations on “Population dynamics and management of aphid, Aphis craccivora Koch in cowpea, Vigna unguiculata (L.) Walp. grown for seed purpose” were carried out at Main Vegetable Research Station, Anand Agricultural University, Anand (Gujarat) during summer and kharif, 2017. Aphid population first appeared during first week of March in summer, 2017 when crop at vegetative growth stage. Incidence of the aphid on cowpea was observed from March to April. Initially, its population was low, gradually increased in its numbers and attained peak level (27.14/3 cm twig) at flowering to pod developing stage during first week of April. Then after, aphid population decreased and disappeared with the maturity of crop from first week of May. Aphid incidence was found higher during 1st to 4th week of April. In kharif, 2017 population of aphid first appeared during 4th week of August and gradually increased up to the 3rd week of October and then after disappeared from 1st week of November. It’s peak level (30.10/3 cm twig) was found in 1st week of October, coincide with the flowering to pod developing stage of the crop. No significant impact of studied abiotic factors was observed on aphid population.en-USnullThesis