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Chemical Weed Control in Container-grown Nursery Stock1

P. L. Carpenter

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Abstract

Abstract 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/m 3 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/m 2 ), dichlobenil (0.44 g/m 2 ) plus trifluralin (0.22 g/m 2 ), or simazine (0.44 g/m 2 ).

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Abstract 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/m 3 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/m 2 ), dichlobenil (0.44 g/m 2 ) plus trifluralin (0.22 g/m 2 ), or simazine (0.44 g/m 2 ).

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Available abstract

Abstract 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/m 3 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/m 2 ), dichlobenil (0.44 g/m 2 ) plus trifluralin (0.22 g/m 2 ), or simazine (0.44 g/m 2 ).

Key concepts: Simazine, Perlite, Trifluralin, Leaching (pedology), Ornamental plant, Weed control, Weed, Chemistry

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