Evaluation of herbicides for effective weed control in irrigated castor (Ricinus communis L.)
EVALUATION OF HERBICIDES FOR EFFECTIVE WEED CONTROL IN IRRIGATED CASTOR
Authors
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P M VAGHASIA
Main Oilseeds Research Station, Junagadh Agricultural University, Junagadh-362 001, Gujarat
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V B BHALU
Main Oilseeds Research Station, Junagadh Agricultural University, Junagadh-362 001, Gujarat
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R H KAVANI
Main Oilseeds Research Station, Junagadh Agricultural University, Junagadh-362 001, Gujarat
Keywords:
Castor, Fenoxaprop-ethyl, Pendimethalin, Quizalofop-ethyl, Trifluralin, Weed controlAbstract
An experiment was conducted to evaluate the efficacy of weed management practices using pre-emergence (pendimethalin and trifluralin) and post-emergence herbicides (quizalofop-ethyl and fenoxaprop-ethyl) along with weed free and unweeded check in castor (cv. GCH-6) under irrigated conditions at Main Oilseeds Research Station, Junagadh Agricultural University, Junagadh for three consecutive years during kharif 2010 to 2012. The experiment was conducted in randomised block design with three replications on medium clay soils with pH 7.9. The experimental field was infested with grasses and broad leaved weeds viz., Echinochloa colonum, Eluropus villosus, Dactyloctenium aegyptium, Brachiaria sp., Cyperus rotundus, Commelina benghalensis, Digera arvensis,
Indigofera glandulosa and Amaranthus viridis. The highest castor seed yield during the study period was found in weed free control (4429, 2546 and 2581 kg/ha during yearI, II and III, respectively). Similarly, pooled mean ofseed yield (3183 kg/ha) was highest in weed free control. Among the herbicidal treatments, trifluralin @ 1.0 kg a.i./ha followed by post-emergence application of quizalofop-ethyl @ 0.05 kg a.i./ha at 25 days after sowing (DAS) recorded highest seed yield (3005 kg/ha) due to lower dry weight of weeds (374 kg/ha), higher weed control efficiency (85.9%) at 75 DAS and lower weed index (5.5%). This treatment resulted in higher gross returns
(` 120208/ha), net returns (` 90398/ha) and B:C ratio (3.0). However, this was at par with application of pendimethalin @ 1.0 kg a.i./ha followed by post-emergence quizalofop-ethyl @ 0.05 kg a.i./ha at 25 DAS.
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References
Bhale V M, Karmore J V, Patil Y R and Deshmukh P 2012. Integrated weed management in groundnut. Pakistan Journal of Weed Sciences Research,18: 733-739.
Burton J D 1997. Acetyl-coenzyme A carboxylase inhibitors. pp.187-205 In: Herbicide Activity: Toxicology, Biochemistry and Molecular Biology. (Eds Roe R M , Burton R M and Kuhr R J, Burke V A: IOS.
Dubey M, Singh S, Kewat M L and Sharma J K 2010. Efficacy of imazethapyr against monocot weeds in groundnut. Indian Journal of Weed Science, 42(1&2): 27-30.
Gowda R C, Devi L S and Prasad T V 2002. Bio-efficacy of herbicides in groundnut and residues of pendimethalin in soil under fingermillet-groundnut cropping system. Pesticide Research Journal, 14(2): 263-267.
Maciel C D G, Poletine J P, Velini E D, Amaral J G C, Zani L P, Santos R F Rodrigues M, Raimondi M A and Ribeiro R B 2008. Possibility of applying total action herbicide tank mixture using direct sprayer on dwarf internode castor bean. Planta Daninha, 26: 457-464.
Maciel C D G, Poletine J P, Velini E D, Zanotto M D, Amaral J G C, Santos H R, Artioli J C, Silva R R M, Ferreira R V, Lolli J and Raimondi M A 2007. Herbicide selectivity in castor bean cultivars. Revista Brasileira de Oleaginosas e Fibrosas, 11: 47-54.
Malunjkar B D, Mulik B B and Patil S C 2012. Evaluation of post-emergence herbicides in rainy season groundnut. Indian Journal of Weed Science, 44(2): 95-97.
Ramkrishna A, Ong C K and Reddy S L N 1990. Efficacy of herbicides on the control of weeds in groundnut. International Arachis Newsletter, 7: 19-20.
Roy D, Patel R K and Ojha O P 2003. Study on podding index and other traits in groundnut. Legume Research, 26(4) : 310-312.
Sasikala B, Kumari C R, Obulamma U and Reddy C R 2007. Effect of chemical weed control on yield and economics ofrabi groundnut. Journal of Research ANGRAU, 35(3): 70-73.
Singh Ishwar, Rathore M S, Mehriya M L, Chawra R S and Chandawat M S. 2013. Weed management in irrigated castor through herbicides. Journal of Oilseeds Research, 30(2): 150-153.
Valdinei S, Liv S S, Franklin M O S, Vivianny N B S and Giovani G B 2012. Pre and post emergence herbicides for weed control in castor crop. Industrial Crops and Products, 37:235-237.
