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Factors Involved in Alachlor Injury to the Potato (Solanum tuberosum)

Published online by Cambridge University Press:  12 June 2017

J.N. Belote III  and
T.J. Monaco
J.N. Belote III
Affiliation:
Dep. Hort. Sci., North Carolina State Univ., Raleigh, NC 27607
T.J. Monaco
Affiliation:
Dep. Hort. Sci., North Carolina State Univ., Raleigh, NC 27607
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Abstract

Results from greenhouse and growth chamber studies indicated that alachlor [2-chloro-2′,6-diethyl-N-(methoxymethyl) acetanilide] injury to ‘Superior’ potatoes (Solanum tuberosum L.) was related to time of herbicide application and temperature. Injury to the ‘Superior’ cultivar was observed when alachlor was applied just before potato emergence. Necrosis of shoots near the soil surface, shoot dieback, stem swelling, leaf crinkle, and plant stunting were characteristic symptoms of alachlor injury. Cool temperatures appeared to intensify the injury. ‘Superior’ potatoes outgrew injury within 41 days after treatment. Herbicide placement studies in the growth chamber suggested that alachlor or its metabolites were absorbed by the shoots of emerging ‘Superior’ potatoes. Under growth chamber conditions the ‘Katahdin’ cultivar was injured by preemergence applications of alachlor when the herbicide was applied just before plant emergence. Injury symptoms were similar to those observed on the ‘Superior’ cultivar. ‘Pungo’ and ‘Norchip’ potatoes were tolerant to preemergence applications of the herbicide regardless of time of application.

Keywords

Site of uptakecultivar tolerance
Type
Research Article
Information
Weed Science , Volume 25 , Issue 6 , November 1977 , pp. 482 - 486
Copyright
Copyright © 1977 by the Weed Science Society of America 

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