Herbicide seed treatment for weed control in wet‐seeded rice
作者:
M. O. Mabbayad,
K. Moody,
期刊:
Tropical Pest Management
(Taylor Available online 1992)
卷期:
Volume 38,
issue 1
页码: 9-12
ISSN:0143-6147
年代: 1992
DOI:10.1080/09670879209371637
出版商: Taylor & Francis Group
关键词: Application method;herbicide concentration;phytotoxicity;germination;growth
数据来源: Taylor
摘要:
One laboratory and two field experiments were conducted at the International Rice Research Institute (IRRI) to determine the effect of herbicides applied as seed treatments on crop safety and weed control in wet‐seeded rice(Oryza sativaL.). In the laboratory experiment all the herbicides tested, except butachlor‐2,4‐D, did not affect rice seed germination. Butachlor‐2,4‐D reduced root growth the most, while thiobencarb caused the greatest reduction in shoot growth. In the first field experiment all the seed treatments except bensulfuron reduced crop stand. The same herbicides poured directly onto flooded fields several days after sowing did not decrease plant stand significantly. Plant heights were reduced significantly by seed treatments with both butachlor formulations and pretilachlor + fenclorim. The best weed control was observed with pretilachlor + fenclorim applied either as a seed treatment or poured onto water. In the second field experiment, pretilachlor + fenclorim at 0.45 kg a.i./ha reduced crop stand and slightly stunted plant height when applied to the seed. Weed weights were generally less, and crop yields were increased, in the herbicide‐treated plots compared with the untreated plots, regardless of application method. Seed treatment with herbicides appears to be a promising technique for controlling weeds in wet‐seeded rice.
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