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Controlling submersed weeds in rice

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Authors

D. E. Seaman, University of California
M. D. Morse
M. D. Miller, University of California
W. A. Harvey, University of California
L. L. Buschmann
C. M. Wick
B. B. Fischer

Publication Information

California Agriculture 22(11):11-11.

Published November 01, 1968

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Abstract

Field tests in 1966 and 1967 have confirmed initial reports from the Rice Experiment Station, Biggs, that chemical control of submersed aquatic weeds frequently results in substantial increases in rice yield. Promising materials for this purpose are TD294, Hydrothal 191, and chloroxuron. Injury to the seedling rice was the least when these chemicals were applied about 35 days after flooding and seeding. More work is needed to determine precisely how long riceland-treated water must be held to control the submersed weeds most effectively while also eliminating any possible hazard to wildlife, including fish. It should also be determined whether the yield increases result from decreased weed competition or from fertilization provided by the killed submersed weeds (which soon decay, releasing the organically bound plant nutrients).

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Author notes

This is a progress report on cooperative investigations by the departments of Botany and Agronomy of the University of California, Davis, the Agricultural Extension Service, and the California Cooperative Rice Research Foundation, Biggs.

Controlling submersed weeds in rice

D. E. Seaman, M. D. Morse, M. D. Miller, W. A. Harvey, L. L. Buschmann, C. M. Wick, B. B. Fischer
Webmaster Email: wsuckow@ucanr.edu

Controlling submersed weeds in rice

Share using any of the popular social networks Share by sending an email Print article
Share using any of the popular social networks Share by sending an email Print article

Authors

D. E. Seaman, University of California
M. D. Morse
M. D. Miller, University of California
W. A. Harvey, University of California
L. L. Buschmann
C. M. Wick
B. B. Fischer

Publication Information

California Agriculture 22(11):11-11.

Published November 01, 1968

PDF  |  Citation  |  Permissions

Author Affiliations show

Abstract

Field tests in 1966 and 1967 have confirmed initial reports from the Rice Experiment Station, Biggs, that chemical control of submersed aquatic weeds frequently results in substantial increases in rice yield. Promising materials for this purpose are TD294, Hydrothal 191, and chloroxuron. Injury to the seedling rice was the least when these chemicals were applied about 35 days after flooding and seeding. More work is needed to determine precisely how long riceland-treated water must be held to control the submersed weeds most effectively while also eliminating any possible hazard to wildlife, including fish. It should also be determined whether the yield increases result from decreased weed competition or from fertilization provided by the killed submersed weeds (which soon decay, releasing the organically bound plant nutrients).

Full text

Full text is available in PDF.

Author notes

This is a progress report on cooperative investigations by the departments of Botany and Agronomy of the University of California, Davis, the Agricultural Extension Service, and the California Cooperative Rice Research Foundation, Biggs.


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