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Response of Purple Nutsedge to Repeated Applications of Glyphosate

Published online by Cambridge University Press:  12 June 2017

Bernard H. Zandstra ,
Chris K. H. Teo  and
Roy K. Nishimoto
Bernard H. Zandstra
Affiliation:
Hort. Dep. of Hort., Univ. of Hawaii, 3190 Maile Way, Honolulu, HI 96822
Chris K. H. Teo
Affiliation:
Hort. Dep. of Hort., Univ. of Hawaii, 3190 Maile Way, Honolulu, HI 96822
Roy K. Nishimoto
Affiliation:
Hort. Dep. of Hort., Univ. of Hawaii, 3190 Maile Way, Honolulu, HI 96822
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Abstract

Purple nutsedge (Cyperus rotundus L.) plants were treated in the greenhouse and field with glyphosate [N-(phosphonomethyl)glycine]. Fresh weight of leaves, sprouts per original tuber, and sprouts per new tuber were reduced by 4 kg/ha glyphosate in the greenhouse. In the field, glyphosate at 2 and 4 kg/ha was compared to several herbicides for nutsedge control in repeated applications over an 8-month period. After several applications, glyphosate reduced the number of plants per unit area. After rotovation (working the soil thoroughly to a depth of 15 cm) and reapplication, glyphosate and MSMA (monosodium methanearsonate) plots had fewer plants and tubers per unit area than controls.

Type
Research Article
Information
Weed Science , Volume 22 , Issue 3 , May 1974 , pp. 230 - 232
Copyright
Copyright © 1974 by the Weed Science Society of America 

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References

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