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Tolerance of Asparagus (Asparagus officinalis) to Clopyralid

Published online by Cambridge University Press:  12 June 2017

Rick A. Boydston
Rick A. Boydston*
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Irrigated Agric. and Ext. Cent., Prosser, WA 99350
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Abstract

Clopyralid at 0.3 or 0.6 kg ae ha–1 applied once or twice during the asparagus harvest season for two consecutive years did not significantly reduce the number of spears or total weight of asparagus harvested. In a second study, clopyralid applied at 0.3 kg ha–1 twice during the harvest season and once at layby for two consecutive years did not reduce asparagus yield in the first year of treatment. In the second year, the number and weight of asparagus spears was reduced. Clopyralid applied during the harvest season caused some epinastic growth of asparagus after layby. Clopyralid applied to emerged asparagus spears slightly increased the number of cull spears harvested, but was less damaging than 2,4-D or dicamba.

Keywords

Clopyralid, 3,6-dichloro-2-pyridinecarboxylic acid2,4-D, (2,4-dichlorophenoxylacetic aciddicamba, 3,6-dichloro-2-methoxybenzoic acidasparagus, Asparagus officinalis L.Yieldinjury2,4-DdicambasurfactantCIRAR
Type
Research
Information
Weed Technology , Volume 6 , Issue 2 , June 1992 , pp. 352 - 355
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

Literature Cited

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