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Preemergence Weed Control in Garden Chrysanthemums

Published online by Cambridge University Press:  12 June 2017

R. E. Widmer ,
D. B. White  and
W. H. Gray
R. E. Widmer
Affiliation:
Department of Horticultural Science
D. B. White
Affiliation:
Department of Horticultural Science
W. H. Gray
Affiliation:
West Central Experiment Station, Morris, Minnesota
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Abstract

Nineteen granular herbicides were applied at two rates to garden chrysanthemums (Chrysanthemum morifolium Ram.) in plantings at St. Paul and Morris, Minnesota. The soil at St. Paul was classified as silt loam and at Morris, as clay loam. All herbicides were applied to freshly cultivated plots which then were irrigated. The compound a,a,a-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine (trifluralin) at 8 lb/A gave excellent weed control at both locations; trifluralin at 4 lb/A gave 99% and 97% weed control at St. Paul and Morris, respectively; 3-amino-2,5-dichlorobenzoic acid (amiben) at 6 lb/A gave 99% control at Morris and 76% control at St. Paul; 2,6-dichlorobenzonitrile (dichlobenil) at 3 lb/A gave 93% control at St. Paul and 88% at Morris. Application of 2,4-bis(isopropylamino)-6-methylmercapto-s-triazine (prometryne) at 8 lb/A gave excellent weed control at both locations but caused serious injury to the chrysanthemums.

Type
Research Article
Information
Weed Science , Volume 16 , Issue 1 , January 1968 , pp. 42 - 45
Copyright
Copyright © 1968 Weed Science Society of America 

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References

Literature Cited

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