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Herbicide Performance in Rice (Oryza sativa) under Three Flooding Conditions

Published online by Cambridge University Press:  12 June 2017

Edward P. Richard Jr.  and
Joe E. Street
Edward P. Richard Jr.
Affiliation:
Delta Branch, Mississippi Agric. and For. Exp. Stn., Stoneville, MS 38776
Joe E. Street
Affiliation:
Delta Branch, Mississippi Agric. and For. Exp. Stn., Stoneville, MS 38776
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Abstract

A 3-yr study was conducted to compare the performance of several herbicides applied alone and in mixtures under three flooding conditions in dry-seeded rice (Oryza sativa L. ‘Labelle’). When the soil remained moist during the 2-week unflooded periods (1979 and 1981), weed emergence was slowed and no advantage with respect to enhanced weed control and increased rice yields could be demonstrated over that of the standard sequential propanil (3′,4′-dichloropropionanilide) application. However, in 1980 when drought stress may have reduced initial postemergence activity and weeds emerged during the 14-day unflooded periods, differences in weed control between herbicides were obtained. Results of this study also indicate that yield losses from weed competition resulted primarily from early season competition, and that the principal advantage of the residual herbicides in dry-seeded rice may be to eliminate the need for retreatment with propanil when flooding is delayed or fields are drained.

Keywords

Echinochloa crus-galliSesbania exaltawater managementECHCGSEBEX
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 32 , Issue 2 , March 1984 , pp. 157 - 162
Copyright
Copyright © 1984 by the Weed Science Society of America 

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References

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