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Environmental Influence on Bentgrass Treated with Silvex

Published online by Cambridge University Press:  12 June 2017

Lloyd M. Callahan ,
Ralph E. Engel  and
Richard D. Ilnicki
Lloyd M. Callahan
Affiliation:
Soils and Crops, Rutgers University
Ralph E. Engel
Affiliation:
Rutgers University, New Brunswick, New Jersey
Richard D. Ilnicki
Affiliation:
Rutgers University, New Brunswick, New Jersey
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Abstract

Colonial bentgrass (Agrostis tenuis Sibth) and creeping bentgrass (Agrostis palustris Huds) exhibited the most tolerance to 1/2, 1, 1 1/2, and 3 lb/A of 2-(2,4,5-trichlorophenoxy)propionic acid (silvex) when grown under cool temperatures, a long photoperiod, and a low pH medium. Injury from treatments was slight to moderate when applied from early to mid-spring, severe when made from late spring to early summer, and very severe when made from late summer to early fall. Silvex appeared to cause the most injury at the 1 and 1 1/2 lb/A rates. Injury was much less from the lower rate of 1/2 lb/A. Root fructosan concentrations decreased with increasing rates under cool temperatures and increased with increasing rates under high temperatures. Bentgrass appeared to tolerate silvex treatments better under low available moisture conditions than under high moisture levels.

Information

Type
Research Article
Information
Weed Science , Volume 16 , Issue 2 , April 1968 , pp. 193 - 196
Copyright
Copyright © Weed Science Society of America 

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References

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