Rice (Oryza sativa) and Corn (Zea mays) Response to Simulated Drift of Glyphosate and Glufosinate1

Autor:	Steven D. Linscombe, Jeffrey M. Ellis, Eric P. Webster, James L. Griffin
Rok vydání:	2003
Předmět:	Oryza sativa Crop injury Plant Science Biology Pesticide Zea mays chemistry.chemical_compound Agronomy chemistry Glufosinate Germination Glyphosate Agronomy and Crop Science Panicle
Zdroj:	Weed Technology. 17:452-460
ISSN:	1550-2740 0890-037X
DOI:	10.1614/wt01-110
Popis:	Field research was conducted during 3 yr to evaluate response of rice and corn to simulated drift rates representing 12.5, 6.3, 3.2, 1.6, and 0.8% of the usage rates of 1,120 g ai/ha glyphosate (140, 70, 35, 18, and 9 g/ha, respectively) and 420 g ai/ha glufosinate (53, 26, 13, and 4 g/ha, respectively). Early-postemergence applications were made to two- to three-leaf rice and six-leaf corn, and late-postemergence applications to rice at panicle differentiation and to corn at nine-leaf stage (1 wk before tasseling). Crop injury was generally greater for the two highest rates of both herbicides when applied early. Little to no reduction in rice or corn height was observed with glufosinate. Glyphosate consistently reduced rice plant height when the two highest rates were applied early, and heading was delayed 2 to 5 d. In 2 of 3 yr, the highest rate of glyphosate reduced rice yield 99 and 67% when applied early and 54 and 29% when applied late. Germination of rice seeds from glyphosate-treated plants was re...
Databáze:	OpenAIRE
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