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Fall Application of Prodiamine for Spring Crabgrass (Digitaria spp.) Control

Published online by Cambridge University Press:  12 June 2017

Thomas W. Fermanian  and
Jean E. Haley
Thomas W. Fermanian
Affiliation:
Agric. Dep. Hortic. Univ. of Illinois at Champaign-Urbana, Urbana, IL 61801
Jean E. Haley
Affiliation:
Agric. Dep. Hortic. Univ. of Illinois at Champaign-Urbana, Urbana, IL 61801
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Abstract

Fall application of a PRE herbicide offers professional lawncare applicators additional flexibility in scheduling necessary weed control operations. A 3-yr field study was established on common Kentucky bluegrass in Urbana, IL to examine the effectiveness of fall- or spring-applied prodiamine and DCPA for spring large and smooth crabgrass control. Prodiamine was effective for crabgrass control in turf (≥ 91% control) when applied in spring at ≥ 0.4 kg/ha or when it was applied in the fall at ≥ 0.6 kg/ha (≥ 82% control). In most cases, fall-applied prodiamine at the 0.8 kg/ha rate (≥ 91% control) controlled crabgrass as well as spring-applied DCPA at the 11.8 kg/ha rate (≥ 94% control). Little reduction in turf quality (≥ 8.3) occurred when prodiamine was applied in the fall at 0.8 kg/ha or less. Only when prodiamine was applied at 2.2 kg/ha was there significant quality loss (7.3) with spring applications. In a second experiment to evaluate split fall and spring prodiamine applications for crabgrass control, all split applications had 100% crabgrass control which was not significantly different from single applications of ≥ 1.4 kg/ha.

Keywords

DCPA, dimethyl 2,3,5,6-tetrachloro-1,4-benzenedicarboxylateprodiamine, N3,N3-di-n-propyl-2,4-dinitro-6-(trifluoromethyl)-m-phenylenediamine)large crabgrass, Digitaria sanguinalis (L.) Scop. # DIGSAsmooth crabgrass, Digitaria ischaemum (Schreb. ex Schweig.) Schreb. ex Muhl. # DIGISKentucky bluegrass, Poa pratensis L. #POAPRField studyDCPAPoa pratensisDigitaria ischaemumDigitaria sanguinalisDIGISDIGSAPOAPR
Type
Research
Information
Weed Technology , Volume 8 , Issue 3 , September 1994 , pp. 612 - 616
Copyright
Copyright © 1994 by the Weed Science Society of America 

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References

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