Effect of water overflowing from a herbicide‐treated rice field on herbicide performance
作者:
E. M. Castin,
P. P. Pablico,
K. Moody,
期刊:
Tropical Pest Management
(Taylor Available online 1992)
卷期:
Volume 38,
issue 1
页码: 30-35
ISSN:0143-6147
年代: 1992
DOI:10.1080/09670879209371641
出版商: Taylor & Francis Group
关键词: formulation;application method;environmental contamination;herbicide concentration
数据来源: Taylor
摘要:
Water overflowing from plots 2h after applying butachlor at rates ranging from 0.3 to 1.0 kg ai/ha did not decrease weed control of treated plots and grain yield were significantly higher than those of untreated check plots. Yields in plots that received butachlor directly, or by overflowing into similar sized receiving plots did not differ significantly from those in plots treated with butachlor where no overflowing occurred. Doubling or tripling the size of the untreated plots that received butachlor from a treated plot resulted in poor weed control and lower grain yields. Similar results were obtained when butachlor was applied as an EC or as a granule to the treated plots. The weed control obtained in untreated plots receiving overflow water from butachlor‐treated plots resulted from considerable amounts of the applied herbicide remaining suspended in floodwater for 1h after overflowing (3h after application). The performance of pretilachlor‐fenclorim, bensulfuron, butachlor‐2,4‐D, piperophos‐2,4‐D, and thiobencarb with or without 2,4‐D was also not affected by water overflowing from herbicide‐treated fields 2h after soil application.
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