Irrigation scheduling and weed management in rabi greengram (Vigna radiata)

Abstract

An experiment was conducted in rabi season to study the weeds and yields of greengram as influenced by irrigation scheduling and weed management during 2018-19. Fifteen treatment combinations comprising three irrigation schedules viz., irrigations at flowering, irrigations at flowering and pod development and irrigations at branching, flowering and pod development stage; five weed management practices viz., Pendimethalin CS, Quizalofop-P-ethyl, Pendimethalin CS (PE) fb Quizalofop-P-ethyl (PoE), 2 HW at 20 and 40 DAS and unweeded check. were Echinochloa spp., Trianthema portulacastrum, Digera arvensis. Physalis minima, Convolvulus arvensis and Cynodon dactylon. were found as major weeds in experiment. The growth and yield attributes viz. plant height, number of branches/plant, dry matter accumulation, number of pods/plant, number of seeds/pod and 1000 seed weight were recorded significantly higher under Irrigations each at branching, flowering and pod development stage, ultimately produced higher seed and stover yield. Further, application of Pendimethalin CS 1 kg/ha significantly minimized the weed density and dry weight of weeds, resulted higher growth and yield of green gram crop. Whereas, weeds cause 58.8% yield losses under unweeded control. On the basis of interaction, it is inferred that irrigating the crop at branching, flowering and pod development and managed the weeds either through Pendimethalin CS 1.0 kg/ha (PE) or 2 HW at 20 and 40 DAS.