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Weed Management in Minimum-Tillage Peanuts (Arachis hypogaea) as Influenced by Cultivar, Row Spacing, and Herbicides

Published online by Cambridge University Press:  12 June 2017

Daniel L. Colvin
Affiliation:
Dep. Agron. and Soils, Alabama Agric. Exp. Stn., Auburn Univ., Auburn, AL 36849. Ala. Agric. Exp. Stn. J. Ser. No. 3-84592
Glenn R. Wehtje
Affiliation:
Dep. Agron. and Soils, Alabama Agric. Exp. Stn., Auburn Univ., Auburn, AL 36849. Ala. Agric. Exp. Stn. J. Ser. No. 3-84592
Mike Patterson
Affiliation:
Dep. Agron. and Soils, Alabama Agric. Exp. Stn., Auburn Univ., Auburn, AL 36849. Ala. Agric. Exp. Stn. J. Ser. No. 3-84592
Robert H. Walker
Affiliation:
Dep. Agron. and Soils, Alabama Agric. Exp. Stn., Auburn Univ., Auburn, AL 36849. Ala. Agric. Exp. Stn. J. Ser. No. 3-84592

Abstract

Field experiments were conducted in 1982 and 1983 on a Dothan sandy loam (Plinthic Paleudult) at Headland, AL, to investigate minimum-tillage production of peanuts (Arachis hypogaea L.). The experiments included two peanut varieties: a) ‘Pronto’ (an earlier maturing Spanish type), and b) ‘Florunner’ (a later maturing runner type). Two row-spacing patterns were used: a) conventional 91-cm rows, and b) a modified twin 18-cm row pattern. A constant seeding rate (140 kg/ha) was used regardless of row spacing. Six herbicide systems were evaluated within each combination of variety and row spacing. The Florunner variety outyielded the Pronto variety across both years and weed management systems. Modified twin 18-cm rows outyielded conventional 91-cm rows across years and peanut varieties. Two of the six weed management systems were successful: 1) paraquat (1,1’-dimethyl-4,4’-bipyridinium ion) + oryzalin (3,5-dinitro-N4,N4-dipropylsulfanilamide) (preemergence), paraquat (ground cracking), naptalam (N-1-naphthylphthalamic acid) + dinoseb (2-sec-butyl-4,6-dinitrophenol) (postemergence); and 2) paraquat + pendimethalin [N-(1-ethylpropyl-3,4-dimethyl-2,6-dinitrobenzenamine] (preemergence), acetochlor [2-chloro-N(ethoxymethyl)-6’-ethyl-o-acetotoluidide] + dinoseb (ground cracking), and cyanazine {2-[[4-chloro-6-(ethylamino)-s-triazine-2-yl]amino]-2-methylpropionitrile} (early postdirected spray). Both systems provided the best overall control of Texas panicum (Panicum texanum Buckl. ♯ PANTE), Florida beggarweed [Desmodium tortuosum (Sw.) DC. ♯ DEDTO], and sicklepod (Cassia obtusifolia L. ♯ CASOB) and were acceptable for use in minimum-tillage peanut production.

Type
Weed Control and Herbicide Technology
Copyright
Copyright © 1985 by the Weed Science Society of America 

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References

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