Agronomy Journal Journal of Natural Resources and Life Sciences Education
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Published online 1 March 1968
Published in Agron J 60:183-185 (1968)
© 1968 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Interaction Effects of Atrazine and CDAA, Linuron, Amiben, or Trifluralin on Soybean Growth1

W. G. Espinoza, R. S. Adams, Jr. and R. Behrens2

Growth chamber experiments were conducted to study the influence of atrazine, CDAA, linuron, amiben, trifluralin, and combinations of atrazine with these herbicides on the dry matter produced by two varieties of soybeans. Sublethal atrazine treatments did not significantly depress soybean growth as compared to the control. The effect of atrazine in combination with CDAA or linuron was not significant. When damping off organisms were not controlled, severe injury to soybeans occurred in treatments containing amiben or trifluralin at 4.5 ppmw. Sublethal amounts of atrazine appeared to overcome this injury. When seeds were treated with fungicide, the growth of soybean seedlings was depressed by treatments containing combinations of trifluralin and atrazine in proportiont o the amounot f atrazine present. Combinations of atrazine and amiben gave growth responses similar to those observed in the earlier experiments, except that pathogen injury was inhibited by the fungicide.

Key Words: herbicide interactions • 2-chloro-4ethylamino-6-isopropyl amino s-triazine • 2-chloro-N, N-diallylacetamide, 3-(3,4-dichlorophenyl)-1-methylurea • 3-amino 2,5-dichlorobenzoic acid • {alpha}, {alpha}, {alpha}-trifluroro-2, 6-dintro-N, N-dipropyl-p-toluidine • N-trichloromethylmercapto-4-cyclohexane-1:2-dicarboximide • Webster clay loam

1 Contribution from the Department of Soil Science, University of Minnesota 55101. Paper No. 6296 Scientific Journal Series, Minnesota Agriculture Experiment Station. Part of a thesis submitted by the senior author in partial fulfillment of the requirements for the M.S. degree.

2 Assistant Professor, Universidad de Concepcion, Chile (formerly Research Assistant Soil Science Department, University of Minnesota); Assistant Professor Soil Science Department; and Professor, Department Agronomy and Plant Genetics.

Received for publication August 22, 1967.




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The SCI Journals Crop Science Vadose Zone Journal
Journal of Natural Resources
and Life Sciences Education		 Soil Science Society of America Journal
Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome
Copyright © 1968 by the American Society of Agronomy.