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Evaluation of Ethofumesate for Annual Bluegrass (Poa annua) and Turfgrass Tolerance

Published online by Cambridge University Press:  12 June 2017

G. Euel Coats  and
Jeff V. Krans
G. Euel Coats
Affiliation:
Dep. Plant Pathol. and Weed Sci., Mississippi State Univ., Mississippi State, MS 39762
Jeff V. Krans
Affiliation:
Agron. Dep., Mississippi State Univ., Mississippi State, MS 39762
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Abstract

Field and greenhouse studies were conducted to evaluate annual bluegrass (Poa annua L. # POAAN) control and phytotoxicity of ethofumesate [(±)-2-ethoxy-2,3-dihydro-3,3-dimethyl-5-benzofuranyl methanesulfonate] to selected warm- and cool-season turfgrass species. Annual bluegrass control in non-overseeded dormant hybrid bermudagrass [Cynodon dactylon (L.) Pers. X C. tranvaalensis Burtt-Davy Tifgreen’ # CYNDA] was 75% or greater with at least two ethofumesate applications at monthly intervals starting in December. Tifgreen bermudagrass spring growth was delayed with more than two applications of ethofumesate at 1.1 kg ai/ha, or when the second application was made after January. Under greenhouse conditions the growth of both Tifgreen and Tifdwarf bermudagrass was less when treated with ethofumesate. Stand and shoot growth of 29 cultivars of ryegrass (Lolium spp.), bluegrass (Poa spp.), bentgrass (Agrostis spp.), and red fescue (Festuca rubra L. # FESRU) were reduced by ethofumesate at 1.1 kg/ha as a preemergence or split (0.5 kg/ha preemergence + 0.5 kg/ha postemergence) application. Postemergence applications were less phytotoxic to cool-season turfgrasses than preemergence applications. Perennial ryegrass stands were generally not reduced by postemergence application of ethofumesate at 1.1 kg/ha. However, shoot growth of perennial ryegrass was reduced.

Keywords

Bermudagrasscool-season turfgrass
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 34 , Issue 6 , November 1986 , pp. 930 - 935
Copyright
Copyright © 1986 by the Weed Science Society of America 

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References

Literature Cited

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