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Annual Grass Control in Cool Season Turf with Sequential Applications of Unlike Preemergence Herbicides

Published online by Cambridge University Press:  12 June 2017

Zachary J. Reicher
Affiliation:
Dep. Agronomy, Purdue University, West Lafayette, IN 47907
Clark S. Throssell
Affiliation:
Dep. Agronomy, Purdue University, West Lafayette, IN 47907
Jeff L. Lefton
Affiliation:
Dep. Agronomy, Purdue University, West Lafayette, IN 47907

Abstract

Control of goosegrass and large crabgrass with different preemergence herbicides for the initial and sequential application was studied at four locations in Indiana. Pendimethalin at 1.1 kg ai ha-1 was used as the initial application in all treatments. Sequential treatments applied 6 wk after the initial treatment consisted of: 2.2 kg ha-1 benefin; 1.4/0.7 kg ha-1 benefin/trifluralin; 8.4 kg ha-1 bensulide; 11.8 kg ha-1 DCPA; 0.6 kg ha-1 dithiopyr; 2.2 kg ha-1 oxadiazon; 1.1 kg ha-1 pendimethalin; or 0.6 kg ha-1 prodiamine. Dithiopyr at 0.6 kg ha-1 with no initial application was also included. Highest large crabgrass control ratings were obtained through September with pendimethalin + pendimethalin, pendimethalin + dithiopyr, and dithiopyr alone postemergence. All other sequential applications tested improved control over a single application of 1.1 kg ha-1 pendimethalin, but rarely gave adequate season long control.

Type
Research
Copyright
Copyright © 1991 Weed Science Society of America 

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References

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