Chemical Weed Control in Container-grown Nursery Stock1

in HortScience
Philip L. CarpenterPurdue University, Lafayette, Indiana

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Broad-spectrum herbicides severly injured container-grown (Cotoneaster divaricata, Rehd. & Wils. and Euonymus fortunei, (Turcz.) Hand-Mazz. cv. Coloratus, because of rapid leaching into the root zone as a result of the porous peat-perlite medium. Injury was eliminated when activated carbon at 0.75 kg/m3 was mixed into the medium. Weed control was achieved by applying a 2.5 cm layer of the medium containing herbicide (but not activated carbon). The most effective herbicides were dichlobenil (0.44 g/m2), dichlobenil (0.44 g/m2) plus trifluralin (0.22 g/m2), or simazine (0.44 g/m2).

Contributor Notes

Received for publication March 12, 1973. Journal Article 4341, Purdue University, Agriculture Experiment Station.

Department of Horticulture

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