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2009•ORYZA- An International Journal on RiceRequires access

Evaluation of clomazone for controlling weeds in wet direct-sown rice

K. Kenchaiah, B. G. Shekara, K. N. Kalyanamurthy, S C Madhu

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Abstract

The efficacy of clomazone alone and tank mix formulation of clomazone and propanil at different concentration against weeds in direct wet seeded rice under puddled condition was studied. The predominant weed species observed in experimental plots were Echinochloa crusgalli, Echinochloa colona, Panicum repens, Cyperus iria, Cyperus difformis, Ischaemum rugosum, Spillanthus calva, Morselia quadrifolia and Molluga sp. The results indicated that tank mix application of clomazone 20 EC and propanil 40 EC at 750 ml ha−1 applied at 15 or 20 days after sowing controlled weeds gave effectively and on par yield with weed free treatment (manual weeding) and recommended herbicide (Pretilachlor + Safener) besides, being phytotoxic to crop.

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What this paper is about

The efficacy of clomazone alone and tank mix formulation of clomazone and propanil at different concentration against weeds in direct wet seeded rice under puddled condition was studied. The predominant weed species observed in experimental plots were Echinochloa crusgalli, Echinochloa colona, Panicum repens, Cyperus iria, Cyperus difformis, Ischaemum rugosum, Spillanthus calva, Morselia quadrifolia and Molluga sp. The results indicated that tank mix application of clomazone 20 EC and propanil 40 EC at 750 ml ha−1 applied at 15 or 20 days after sowing controlled weeds gave effectively and on par yield with weed free treatment (manual weeding) and recommended herbicide (Pretilachlor + Safener) besides, being phytotoxic to crop.

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Available abstract

The efficacy of clomazone alone and tank mix formulation of clomazone and propanil at different concentration against weeds in direct wet seeded rice under puddled condition was studied. The predominant weed species observed in experimental plots were Echinochloa crusgalli, Echinochloa colona, Panicum repens, Cyperus iria, Cyperus difformis, Ischaemum rugosum, Spillanthus calva, Morselia quadrifolia and Molluga sp. The results indicated that tank mix application of clomazone 20 EC and propanil 40 EC at 750 ml ha−1 applied at 15 or 20 days after sowing controlled weeds gave effectively and on par yield with weed free treatment (manual weeding) and recommended herbicide (Pretilachlor + Safener) besides, being phytotoxic to crop.

Key concepts: Propanil, Clomazone, Echinochloa, Cyperus, Weed, Agronomy, Panicum, Biology

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