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Efficacy of Selected Herbicides as Influenced by Soil Properties

Published online by Cambridge University Press:  12 June 2017

Michael R. Blumhorst ,
Jerome B. Weber  and
Len R. Swain
Michael R. Blumhorst
Affiliation:
Crop Sci. Dep., N.C. State Univ., Raleigh, NC 27695-7620
Jerome B. Weber
Affiliation:
Crop Sci. Dep., N.C. State Univ., Raleigh, NC 27695-7620
Len R. Swain
Affiliation:
Crop Sci. Dep., N.C. State Univ., Raleigh, NC 27695-7620
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Abstract

Field experiments were conducted on six loam and sandy loam soils to study the influence of various soil parameters on atrazine, cyanazine, alachlor, metolachlor, and pendimethalin efficacy. Herbicidal activity was highly correlated to the soil organic content. Humic matter content was equally or better correlated (r = 0.70 to 0.91) with herbicide bioactivity than was organic matter content (r = 0.66 to 0.84). Regression equations were determined which allow herbicide rate recommendations for 80% weed control to be calculated based on soil humic matter or organic matter levels.

Keywords

Alachlor, 2-chloro-N-(2,6-diethylphenyl)-N-(methoxymethyl)acetamideatrazine, 6-chloro-N-ethyl-N′-(1-methylethyl)-1,3,5-triazine-2-4-diaminecyanazine, 2-[[4-chloro-6-(ethylamino)-1,3,5-triazin-2-yl]amino]-2-methylpropanamidemetolachlor, 2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamidependimethalin, N-(1-ethylpropyl)-3,4-dimethyl-2,6-dinitrobenzenamineAtrazinecyanazinealachlormetolachlorpendimethalinhumic matterorganic matter
Type
Research
Information
Weed Technology , Volume 4 , Issue 2 , June 1990 , pp. 279 - 283
Copyright
Copyright © 1990 Weed Science Society of America 

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References

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