Vol. 9, Issue 5 (2020)

Author(s):
V Ekka, N Tiwari, S Kujur, D Nayak and Madan Kumar Jha

Abstract:
The Field experiment was conducted during Kharif season 2015 at Research Cum Instructional farm of Indira Gandhi Krishi Vishwavidyalaya, Raipur C.G. to evaluate the quinchlorac herbicide against weeds in transplanted rice. Ten weed control treatments were laid out in randomized block design with three replications. The result revealed that the major weed species in experimental site were Cyperus iria L, Cyanotis axillaris L, Alternanthera triandra L, Echinochloa colona L, Ischaemum rugosum Salisbury, and Caesulia axillaris Roxb. The significantly maximum panicle length and panicle weight was recorded under quinchlorac 250g/l SC @ 250 g ha-1 + bispyribac sodium (10% SC) @ 20 g ha-1 (T₅), which was significantly superior over T₁, T₂, T₃, T₇ and T₁₀, but, it was at par with hand weeding twice at 20 and 40 DAT (T₉), quinchlorac 250 g/l SC @ 250 g ha-1+ ethoxysulfuron (15% WP) @ 15 g. ha-1 (T₄), penoxsulam 21.7% SC @ 20 g ha-1 (T₈), quinchlorac 250 g/l SC @ 312.5 g ha-1 (T₆) and quinchlorac 250 g/l SC @ 250 g ha-1 (T₃). The maximum number of total grains panicle-1 was recorded under quinchlorac 250g/l SC @ 250 g ha-1 + bispyribac sodium (10% SC) @ 20 g ha-1 (134.64), which was significantly superior over T₁, T₂, T₃, T₇ and T₁₀. Quinchlorac 250g/l SC @ 250 g ha-1 + bispyribac sodium (10% SC) @ 20 g ha-1 recorded maximum number of filled and minimum number of unfilled grains panicle-1. As regards to filled and unfilled grains panicle-1 the best performing treatment quinchlorac 250g/l SC @ 250 g ha-1 + bispyribac sodium (10% SC) @ 20 g ha-1was at par to hand weeding twice at 20 and 40 DAT (T₉), quinchlorac 250 g/l SC + ethoxysulfuron (15% WP) @ 250 + 15 g ha-1 (T₄), penoxsulam 21.7% SC @ 20 g ha-1 (T8), and quinchlorac 250 g/l SC @ 312.5 g ha-1 (T₆). The lowest number of filled grains panicle-1 was noted in control (T10), whereas this treatment also recorded the highest number of unfilled grains panicle-1. Among different treatments, quinchlorac 250g/l SC @ 250 g ha-1 + bispyribac sodium (10% SC) @ 20 g ha-1 registered significantly lowest sterility percentage, however, it was at par to penoxsulam 21.7% SC @ 20 g a.i ha-1 (T₈), quinchlorac 250 g/l SC @ 312.5 g ha-1 (T₆), hand weeding twice 20 and 40 DAT (T₉), quinchlorac 250 g/l SC + ethoxysulfuron (15%WP) @ 250 + 15 g ha-1 (T4). The highest sterility percentage was recorded under control (T₁₀). The highest grain (5.37 t ha-1) and straw yield (6.61 t ha-1) were obtained under quinchlorac 250g/l SC @ 250 g ha-1 + bispyribac sodium (10% SC) @ 20 g ha-1 (T₅), which were significantly superior over over T₁, T₂, T₃, T₇ and T₁₀. However, it was at par to hand weeding twice at 20 and 40 DAT (5.18 t ha-1 and 6.42 t ha-1), quinchlorac 250 g/l SC @ 250 g ha-1+ ethoxysulfuron (15% WP) @ 15 g ha-1 (5.08 t ha-1 and 6.40 t ha-1), penoxsulam 21.7% SC @ 20 g ha-1 (4.89 t ha-1 and 6.28 t ha-1), quinchlorac 250 g/l SC @ 312.5 g ha-1 (4.79 t ha-1 and 6.26 t ha-1) and quinchlorac 250 g/l SC @ 250 g ha-1 (4.70 t ha-1 and 6.19 t ha-1), respectively.