Influence of selected herbicides on rooting of turfgrass sod
- S.W. Bingham
Initially, a study was conducted in which the soil surface was treated with herbicides prior to laying sod. In later studies, sod was placed on freshly prepared soil, and then herbicides were applied over the top, as is desirable for crabgrass (Digitaria sanguinalis L. Scop.) control. Sod strips (0.093 m2) were laid on 1.25-cm mesh hardware cloth stretched over a frame. Turfgrass strips, under good management practices and irrigation, were allowed 28 days for root development through the hardware cloth into the soil. Root development was indicated by using a tripod and winch to measure the force required to pull the sod strips from the soil. The strips were removed by pulling on the four corners of the frame in a vertical direction.
Bensulide [O,O-diisopropyl phosphorodithioate S-ester with N-(2-mercaptoethyl) benzenesulfonamide] and benefin (N-butyl-N-ethyl-a,a,a-trifluoro-2,6-dinitro-p-toluidine) gave similar responses on the rooting of turfgrasses. The order of turfgrasses, from least to most inhibited, was ‘Kentucky 31’ fescue (Festuca arundinacea Schreb.), ‘Merion’ Kentucky bluegrass (Poa pratensis L.), and bermudagrass (Cynodon dactylon L. × C. transvaalensis Davy. ‘Tifgreen’). At rates normally used for crabgrass control, bluegrass rooting strength was reduced more than 50%.
DCPA (dimethyl tetrachloroterephthalate) and siduron [1-(2-methylcyclohexyl)-3-phenylurea] produced little effect on tall fescue and Kentucky bluegrass. Siduron caused complete inhibition of rooting in Tifgreen bermudagrass. Normal rates of DCPA reduced rooting about 30% in the bermudagrass. Additional index words: Preemergence herbicides, Crabgrass control. Kentucky bluegrass, Bermudagrass.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
Copyright © 1974. Copyright 1974 by the American Society of Agronomy, Inc. and the Crop Science Society of America, Inc., 5585 Guilford Rd., Madison, WI 53711 USA