Improving butachlor selectivity and weed control in wet-seeded rice

Mabbayad M.O., . and Moody K., . Improving butachlor selectivity and weed control in wet-seeded rice. pp. 117-124. ISSN 0127-6883

Three experiments were conducted to determine the effects of naphthalic anhydride (NA) different times and rates of herbicide application and preplant soil incorporation of butachlor on phytotoxicity weed control and yield of wet-seeded rice (Oryza sativa L.). Butachlor when applied at 1.0 kg a.i/ha 6 days after seedling (DAS) was either toxic or failed to control the weeds. It was toxic when applied from planting to 6 DAS. Applying it 3 days before seeding (DBS) resulted in a good crop stand without growth reduction better and broader spectrum weed control and good yield. NA improved crop safety without altering weed control when the herbicide was applied from planting to 6 DAS. However no improvement was obtained when butachlor was applied 3 DBS. Rates of butachlor equal to and lower than the recommended application rate when applied 3 DBS performed better than 1.0 kg a.i/ha 6 DAS. No added advantage was obtained with a preplant soil incorporation of butachlor compared with a preplant surface application. Surface application of butachlor before seeding was recommended for improved weed control and better crop safety

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Abstract

Three experiments were conducted to determine the effects of naphthalic anhydride (NA) different times and rates of herbicide application and preplant soil incorporation of butachlor on phytotoxicity weed control and yield of wet-seeded rice (Oryza sativa L.). Butachlor when applied at 1.0 kg a.i/ha 6 days after seedling (DAS) was either toxic or failed to control the weeds. It was toxic when applied from planting to 6 DAS. Applying it 3 days before seeding (DBS) resulted in a good crop stand without growth reduction better and broader spectrum weed control and good yield. NA improved crop safety without altering weed control when the herbicide was applied from planting to 6 DAS. However no improvement was obtained when butachlor was applied 3 DBS. Rates of butachlor equal to and lower than the recommended application rate when applied 3 DBS performed better than 1.0 kg a.i/ha 6 DAS. No added advantage was obtained with a preplant soil incorporation of butachlor compared with a preplant surface application. Surface application of butachlor before seeding was recommended for improved weed control and better crop safety

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Item Type:	Article
Additional Information:	5 tables; 26 ref. Summaries (En Malay)
AGROVOC Term:	ORYZA SATIVA
AGROVOC Term:	HERBICIDAS
AGROVOC Term:	ARROZ ACUATICO
AGROVOC Term:	MALEZAS/ ESCARDA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:54
URI:	http://webagris.upm.edu.my/id/eprint/18811

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