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Interaction of Alachlor and Carbofuran

Published online by Cambridge University Press:  12 June 2017

Allan S. Hamill
Dep. of Crop and Soil Sci., Mich. State Univ., E. Lansing, Mich.
Donald Penner
Dep. of Crop and Soil Sci., Mich. State Univ., E. Lansing, MI. 48823


The combination of the herbicide 2-chloro-2′,6′ diethyl-N-(methoxymethyl) acetanilide (alachlor) with the insecticide 2,2-dimethyl-2,3-dihydrobenzofuranyl-7-N-methyl-carbamate (carbofuran) interacted synergistically to reduce barley [Hordeum vulgare L. ‘Larker’] but not corn [Zea mays L. ‘Michigan 400’] growth. Alachlor alone increased the respiration rate of barley. Accumulation of 14C from 14C-alachlor was greater in the plant roots than shoots. The increased accumulation of alachlor in the roots was accentuated by a reduced rate of alachlor metabolism. The basis for the observed interaction appeared to be greater alachlor uptake by barley plants grown from seed treated with carbofuran. A statistical procedure for pesticide combinations in experiments with a completely randomized design was developed for the calculation of interaction significance.

Research Article
Copyright © 1973 Weed Science Society of America 

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