G. SREEKANTH*, B. SANDHYA RANI, P. MAHESWARA REDDY, A. PRASANTHI,
V. CHANDRIKA AND G. KARUNA SAGAR

Department of Agronomy, S.V. Agricultural College, ANGRAU, Tirupati-517 502.

ABSTRACT

A field experiment entitled “Bio-efficacy of pre and post emergence herbicides on weed dynamics and productivity

of blackgram (Vigna mungo L.)” was conducted at Wetland Farm, S.V. Agricultural College, Tirupati campus of Acharya

N.G. Ranga Agricultural University, Andhra Pradesh, India during rabi, 2022-23 to identify the economically feasible weed management practice for broad-spectrum weed control and enhancing productivity of blackgram. The experiment was laid out in a randomized block design with nine weed management practices and replicated thrice. The treatments consisted of PE application of diclosulam 20 g ha-1 + 1 HW at 15 DAS (T₁), PoE application of imazethapyr 50 g ha-1 at 20 DAS (T₂), PoE application of quizalofop-p-ethyl + imazethapyr 98 g ha-1 at 20 DAS (T3), PoE application of imazethapyr + imazamox 70 g ha-1 at 20 DAS (T₄), PoE application of propaquizafop + imazethapyr 125 g ha-1 at 20 DAS (T₅), PoE application of sodium acifluorfen + clodinafop propargyl 245 g ha-1 at 20 DAS (T₆), PoE application of fluazifop-p-butyl + fomesafen 222 g ha-1 at 20 DAS (T₇), Hand weeding twice at 15 and 30 DAS (T₈) and Weedy check (T₉). Results revealed that among all the treatments higher yield and lowest weed growth was achieved with hand weeding twice at 15 and 30 DAS (T₈) which was at par with PoE application of fluazifop-p-butyl + fomesafen 222 g ha-1 at 20 DAS (T₇) and PoE application of sodium acifluorfen + clodinafop propargyl 245 g ha-1 at 20 DAS (T₆).

KEYWORDS: Blackgram, Broad-spectrum, Economically-feasible, Pre and Post emergence herbicides.