Effect of carbofuran on population dynamics of nematodes associated to pea crop in North-Western Himalaya

Abstract

Plant-parasitic nematodes (PPNs) are diverse and pose serious threat to the yield of various crops. Management practices for PPNs in field conditions largely rely on soil application of carbofuran. Carbofuran applied as prophylactic measure at the sowing time provides immediate solution to reduce the population density of nematodes however change in population density of nematodes after application of carbofuran over the crop cycle of pea crop is not known. A survey for community analysis conducted in year 2018-19 in pea crop at Hawalbagh research farm, ICAR-VPKAS, Almora, located in North Western Himalayan region in which genera Pratylenchus identified as most prominent group among different PPNs affecting pea crop. In order to manage the PPNs, carbofuran were applied with the dosage of 1 kg a.i./ha at the time of sowing. Subsequently PPNs density was recorded at monthly interval considering the general life-cycle of PPNs completing in a month. Effect of carbofuran was evaluated on PPNs density for the entire cropping season of pea crop in the North Western Himalaya region. In this study we observed that application of carbofuran reduces the nematodes density initially but in the later phase the population increased significantly.