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Influence of Glyphosate on Resprouting of Parent Tubers of Cyperus esculentus

Published online by Cambridge University Press:  12 June 2017

Paul E. Keeley
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Shafter, CA 93263
Charles H. Carter
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Shafter, CA 93263
Robert J. Thullen
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Shafter, CA 93263

Abstract

Yellow nutsedge (Cyperus esculentus L. # CYPES) was treated with unlabeled and 14C-labeled glyphosate [N-(phosphonomethyl)glycine] to study the toxicity and translocation of glyphosate into parent tubers of this weed. When plants of 2 and 4 weeks of age were treated with 0.6 kg ai/ha of glyphosate, fewer parent tubers from treated plants resprouted (14 and 32%) than tubers from control plants (73 and 59%, respectively) of equal age. Also, fewer tubers resprouted from 2-week than from 4-week-old treated plants. The radioactivity of parent tubers from plants treated at 2 weeks of age, which exceeded that of tubers from plants of 4 and 6 weeks of age, indicated that translocation of 14C into parent tubers decreased as the treated plants increased in age. The differential amounts of 14C translocated appear to explain why applications of glyphosate were more effective in suppressing resprouting of parent tubers from 2-week than 4-week-old plants.

Type
Weed Biology and Ecology
Copyright
Copyright © 1986 by the Weed Science Society of America 

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References

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