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Interaction of Alachlor and Carbofuran

Published online by Cambridge University Press:  12 June 2017

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

Abstract

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.

Type
Research Article
Copyright
Copyright © 1973 Weed Science Society of America 

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