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Release Rate of Three Herbicides from Controlled-Release Tablets

Published online by Cambridge University Press:  12 June 2017

Stanley F. Gorski ,
Stephen Reiners  and
Michael A. Ruizzo
Stanley F. Gorski
Affiliation:
The Ohio State Univ., Dep. Hortic., Columbus, OH 43210
Stephen Reiners
Affiliation:
The Ohio State Univ., Dep. Hortic., Columbus, OH 43210
Michael A. Ruizzo
Affiliation:
The Ohio State Univ., Dep. Hortic., Columbus, OH 43210
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Abstract

Six, 9, and 12-mm diam dicalcium phosphate tablets were evaluated for their release of acetochlor, metolachlor, and metribuzin. Greenhouse bioassays with Italian ryegrass demonstrated that herbicides from the smaller tablets did not control grass as long as from the larger tablets. Italian ryegrass was controlled within a 5- to 7-cm diam circle around the 12-mm diam tablet and a 5-cm diam circle around the 6-mm diam tablet. All tested herbicides responded in a similar fashion. Six-mm diam tablets released metolachlor for 11 weeks, while the 12-mm tablet was active for 28 weeks.

Keywords

Acetochlor, 2-chloro-N-(ethoxymethyl)-N-(2-ethyl-6-methylphenyl)acetamidemetolachlor, 2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamidemetribuzin, 4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-oneItalian ryegrass, Lolium multiflorum Lam. #3 LOLMUControlled-releaseacetochlormetribuzinmetolachlor
Type
Research
Information
Weed Technology , Volume 3 , Issue 2 , June 1989 , pp. 349 - 352
Copyright
Copyright © 1989 by the Weed Science Society of America 

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References

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