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Toxicity and Translocation of Sethoxydim in Bermudagrass (Cynodon dactylon) as Affected by Environment

Published online by Cambridge University Press:  12 June 2017

Gene D. Wills
Gene D. Wills*
Affiliation:
Delta Branch of the Mississippi Agric. and For. Exp. Stn., Stoneville, MS 38776
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Abstract

Toxicity and translocation of nonradiolabeled and translocation of 14C-labeled sethoxydim {2-[1-(ethoxyimino)-butyl]-5-[2-(ethylthio)-propyl]-3-hydroxy-2-cyclohexen-1-one} in common bermudagrass [Cynodon dactylon (L.) Pers. ♯3 CYNDA] were evaluated for foliar treated plants grown 2 or 4 days under controlled environmental conditions. Nonradiolabel treated plants were further grown in the greenhouse for the remainder of 3 weeks. Shoot injury of intact plants was greatest (90%) and regrowth of plants clipped after 2 days treatment each was least (< 5%) at 35 C and 100% RH. At 35 C and 40% RH and at 18 C (40 and 100% RH), shoot injuries were 60 to 68%, regrowth in lengths were 82 to 87%, and in fresh weights were 55 to 74%, respectively. After 2 days treatment, absorption of 14C-activity was greatest (70%) at 35 C and 100% RH, moderate (56%) at 35 C and 40% RH, and least (33 to 43%) at 18 C and 40 and 100% RH, respectively. At 35 C, translocation was approximately 4 fold greater at 100% and 2 fold greater at 40% RH than at 18 C at either RH. Autoradiography indicated the greatest distribution of the radiolabel at 35 C.

Keywords

Herbicideweed controlair temperaturerelative humidityherbicide absorptionCYNDA
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 32 , Issue 1 , January 1984 , pp. 20 - 24
Copyright
Copyright © 1984 by the Weed Science Society of America 

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References

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