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Uptake and Translocation of Foliarly-Applied Atrazine

Published online by Cambridge University Press:  12 June 2017

C. N. Smith Jr.  and
John D. Nalewaja
C. N. Smith Jr.
Affiliation:
North Dakota State Univ., Fargo, North Dakota 58102
John D. Nalewaja
Affiliation:
North Dakota State Univ., Fargo, North Dakota 58102
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Abstract

Uptake of 2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine (atrazine) as influenced by adjuvants to the treatment medium was studied using both excised leaf sections and leaves of intact plants. Uptake of the 14C-atrazine label by yellow foxtail (Setaria glauca (L.) Beauv.) leaf sections was higher at 35 than at 5 C and at pH 3 and 9 than at 5 or 7. The rapid uptake of 14C-atrazine label by corn (Zea mays L.) leaf sections was attributed to a high rate of atrazine metabolism. However, atrazine metabolism did not explain the greater uptake by common lambsquarters (Chenopodium album L.) leaf sections than by yellow foxtail. Atrazine 14C-label uptake by yellow foxtail leaf sections from exogenous solution was influenced by light, phospholipase D or water pretreatment, atrazine concentration, and oil. The 14C-label of atrazine in the leaf distal to the treated spot was greater when the treatment contained an oil than when applied in only water even though the area of the spot was kept constant. Further, greater uptake of the label occurred at a high than at a low temperature regardless of the application medium.

Type
Research Article
Information
Weed Science , Volume 20 , Issue 1 , January 1972 , pp. 36 - 40
Copyright
Copyright © Weed Science Society of America 

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References

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