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Effect of Selected Herbicides on Production of Southern Pines (Pinus spp.) in Nursery Seedbeds

Published online by Cambridge University Press:  12 June 2017

D. H. Gjerstad ,
D. B. South  and
R. H. Crowley
D. H. Gjerstad
Affiliation:
Dep. For., Auburn Univ. Agric. Exp. Stn., Auburn, AL 36830
D. B. South
Affiliation:
Soil & Herbicide Res. Section Leader, Int. Paper Co., Natchez, MS 39120
R. H. Crowley
Affiliation:
Dep. For., Auburn Univ. Agric. Exp. Stn., Auburn, AL 36830
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Abstract

Regional pine seedling tolerance experiments were conducted on five pine (Pinus spp.) species at ten forest nurseries in 1974. Similar studies in 1975 included four pine species at nine locations. From these studies, herbicides appearing safe for preemergence use are bifenox [methyl 5-(2,4-dichlorophenoxy)-2-nitrobenzoate] at 1.7, 3.4, and 6.7 kg/ha; butralin [4-(1,1-dimethylethyl)-N-(1-methylpropyl)-2,6-dinitrobenzenamine] at 2.2, 3.4, 4.5, and 6.7 kg/ha, napropamide [2-(α-naphthoxy)-N,N-diethylpropionamide] at 1.7 kg/ha; napropamide at 1.1 kg/ha plus bifenox at 3.4 kg/ha; dinitramine (N4,N4-diethyl-α,α,α-trifluoro-3,5-dinitrotoluene-2,4-diamine) at 0.37 and 0.74 kg/ha; diphenamid (N,N-dimethyl-2,2-diphenylacetamide) at 4.5 kg/ha, trifluralin (α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine) at 1.1 kg/ha; and profluralin [N-(cyclopropylmethyl)-α,α,α-trifluoro-2,6-dinitro-N-propyl-p-toluidine] at 1.1 and 2.2 kg/ha. Southern pine seedling tolerance to oryzalin (3,5-dinitro-N4,N4-dipropylsulfanilamide) was unacceptable at 1.1 and 2.2 kg/ha. Napropamide severely stunted seedlings at 6.7 kg/ha but affected seedlings only slightly at 3.4 kg/ha.

Keywords

Preemergenceseedling tolerancehandweedingforest
Type
Research Article
Information
Weed Science , Volume 27 , Issue 2 , March 1979 , pp. 173 - 177
Copyright
Copyright © 1979 by the Weed Science Society of America 

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References

Literature Cited

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