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Grass Weed Management Systems in Grain Sorghum (Sorghum bicolor)

Published online by Cambridge University Press:  12 June 2017

Robert H. Walker ,
Bobby E. Norris Jr.  and
John A. McGuire
Robert H. Walker
Affiliation:
Dep. Agron. Soils, Auburn Univ., AL 36849. AAES Journal No. 3-871206
Bobby E. Norris Jr.
Affiliation:
Dep. Agron. Soils, Auburn Univ., AL 36849. AAES Journal No. 3-871206
John A. McGuire
Affiliation:
Res. Data Analysis, Alabama Agric. Exp. Stn., Auburn Univ., AL 36849. AAES Journal No. 3-871206
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Abstract

Field experiments in 1984 and 1985 near Headland, AL involved the influence of 18 integrated weed management systems incorporated from nine herbicide-tillage systems (H-T) and two row patterns on control of large crabgrass and Texas panicum, crop yield, and net returns in grain sorghum. The conventional-tillage system plus herbicide combinations; alachlor preplant incorporated (PPI), atrazine postemergence (POST), and paraquat POST directed, provided 90% or greater control of large crabgrass throughout the season and high sorghum yields in one of two years; and 90% or greater control of Texas panicum from mid-June through mid-August and high sorghum yields in both years. Results in 1984 and 1985 similar to those above were obtained with strip tillage plus herbicide combinations; alachlor PPI, atrazine POST, and paraquat POST directed; alachlor PPI and tridiphane plus atrazine POST; and tridiphane plus atrazine POST and paraquat POST directed. Row patterns did not consistently influence control of large crabgrass, Texas panicum, or sorghum yield. Economic net returns ranged from – $20 to $210 per hectare for the large crabgrass control systems in 1984; however, low sorghum yields in 1985 resulted largely in negative returns. Similar net returns were obtained in the Texas panicum experiment.

Keywords

Alachlor, 2-chloro-N-(2,6-diethylphenyl)-N-(methoxymethyl)acetamideatrazine, 6-chloro-N-ethyl-N′-(1-methylethyl)-1,3,5-triazine-2,4-diamineparaquat, 1,1′-dimethyl-4,4′-bipyridinium iontridiphane, 2-(3,5-dichlorophenyl)-2-(2,2,2-trichloroethyl)oxiranegrain sorghum, Sorghum bicolor (L.) Moench. ♯ SORVUlarge crabgrass, Digitaria sanguinalis (L.) Scop. ♯ DIGSATexas panicum, Panicum texanum Buckl. ♯ PANTEConventional tillagestrip tillagenet returnstridiphanealachlorparaquatatrazineDigitaria sanguinalisPanicum texanumDIGSAPANTESORVU
Type
Research
Information
Weed Technology , Volume 5 , Issue 1 , March 1991 , pp. 54 - 60
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

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