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Terbacil Phytotoxicity and Quackgrass (Agropyron repens) Control in Highbush Blueberries (Vaccinium corymbosum)

Published online by Cambridge University Press:  12 June 2017

C. C. Doughty
C. C. Doughty*
Affiliation:
Western Washington Res. and Ext. Center, Puyallup, WA 98371
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Abstract

Terbacil (3-tert-butyl-5-chloro-6-methyluracil) was applied to highbush blueberry plants (Vaccinium corymbosum L. ‘Pemberton’, ‘Rancocas', ‘Jersey’, and ‘Concord’) growing in a Rifle peat, Camas clay loam, or Mossy Rock silt loam for control of quackgrass [Agropyron repens (L.) Beauv.]. Control was 80 to 100% from applications made in April after the blueberry plants broke dormancy. Higher dosages proved phytotoxic from these applications on Camas clay loam. Applications in February or March while the blueberry plants were still dormant caused no phytotoxicit; to the blueberry plants and provided 80 to 90% quackgrass control. Four consecutive yearly applications caused no residual buildup to the point of phytotoxicity to blueberry plants. Carry-over of terbacil in the soil from year to year did occur.

Keywords

Herbicide safetytolerance
Type
Research Article
Information
Weed Science , Volume 26 , Issue 5 , September 1978 , pp. 488 - 492
Copyright
Copyright © 1978 by the Weed Science Society of America 

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References

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