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Tolerance of Soybean Cultivars to Weed Competition and Herbicides

Published online by Cambridge University Press:  12 June 2017

O. C. Burnside
O. C. Burnside*
Affiliation:
Dep. of Agron., Univ. of Neb., Lincoln, Nebraska 68503
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Abstract

The competitiveness of 10 soybean [Glycine max (L.) Merr.] cultivars to weeds, their tolerance to twice normal rates of commonly used soybean herbicides, and the soil residual properties of these herbicides were studied during 4 years at Lincoln, Nebraska. Three soybean cultivars showing the least percentage yield loss from weeds were ‘Harosoy 63′, ‘Amsoy’, and ‘Corsoy’; whereas cultivars showing the greatest yield loss were ‘Hawkeye 63′, ‘Shelby’, and ‘Lindarin 63′. The two herbicide treatments causing the greatest average soybean yield loss were 3-(3,4-dichlorophenyl)-1-methoxy-1-methylurea (linuron) at 4.5 kg/ha and α,α,α-trifluro-2,6-dinitro-N,N-dipropyl-p-toluidine (trifluralin) at 2.2 kg/ha. Cultivar selection was important in reducing soybean yield loss from herbicides as linuron at 4.5 kg/ha reduced yields 5% for ‘Harosoy 63’ to as much as 31% for ‘Ford’. ‘Neal’ oat (Avena saliva L.) yields showed 4-(methylsulfonyl)-2,6-dinitro-N,N-dipropylaniline (nitralin) to be the most persistent herbicide in soil in this study followed by trifluralin. Plowing the soil eliminated the phytotoxicity of nitralin and trifluralin to subsequently planted oats.

Type
Research Article
Information
Weed Science , Volume 20 , Issue 4 , July 1972 , pp. 294 - 297
Copyright
Copyright © Weed Science Society of America 

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References

Literature Cited

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