Influence of Weed Management on Weed Dynamics and Yield of Machine Sown Pigeonpea [Cajanus cajan (l.) Millsp.] Under Dryland Conditions
Year: 2017
Type: article
Abstract: Field experiments were conducted in rainfed alfisol at Dryland Agricultural Research Station Experimental Farm, Chettinad during Kharif 2013 and 2014 season, to find out the effect of different weed management practices in machine sown pigeon pea (var. VBN 2) under dry land conditions. The experiment consisted of following treatments viz., power weeder weeding once at 20 DAS, power weeder weeding twice at 20 and 40 DAS, power weeder weeding once at 20 DAS + one hand weeding, power weeder weeding twice (20 DAS and 40 DAS) + one hand weeding, mulching with cumbu napier trash @ 5 t/ha, imazethapyr @ 50 g a.i ha-1 and quizalofop ethyl @ 50 g a.i ha-1 at 15 DAS, hand weeding at 20 and 40 DAS and these treatments were compared with unweeded control. The trial was laid out in randomized block design with three replications. The results revealed that power weeder weeding twice at 20 and 40 DAS in integration with one hand weeding effectively controlled all kinds of weed flora which were present in both inter and intra row spacing which reflected in higher mean grain yield of 922 kg ha-1 which might be due to better weed control as reflected in lower weed density (12.1), weed dry weight (14.5) and higher weed control efficiency (WCE) of 79.5 per cent. Early post emergence application of imazethapyr @ 50 g a.i ha-1 at 15 DAS had effectively controlled broad leaved weeds and sedges whereas, quizalofop ethyl @ 50 g a.i ha-1 at 15 DAS was effective against grasses.
Author: P. Kathirvelan
Institution: Tamil Nadu Agricultural University
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDGs: Zero hunger, Life on land
Open Access status: diamond
OpenAlex ID: W2769046183