00474290

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http://onlinepubs.trb.org...trr/1986/1075/1075-001.pdf

https://scholar.google.co...+Fry&publication_year=1986

The objective of this study was to compare the effectiveness of single and sequential applications of monosodium methanearsonate (MSMA) with single applications of fenoxaprop for postemergence control of crabgrass (Digitaria spp.). MSMA applied at 2.2 kg/ha twice on a 14-day interval or 1.1 kg/ha applied three times on a 7-day interval provided exceptional (99 percent) control of mature (i.e., three or more tillers) crabgrass, but elicited unacceptable levels of discoloration. When MSMA was applied at 0.6 kg/ha three times on a 7-day interval or at 1.1 kg/ha twice on a 14-day interval, fair (78 to 79 percent) to good (88 percent) control was achieved without unacceptable discoloration of turf. However, a single MSMA application at 2.2 kg/ha, did not effectively control crabgrass. Fenoxaprop (0.28 kg/ha) provided fair (78 percent) to excellent (93 percent) levels of control when applied to mature crabgrass. The erratic performance of fenoxaprop in control of mature crabgrass was attributed to environmental conditions as such conditions affected the vigor of crabgrass. Single applications of fenoxaprop (0.20 and 0.28 kg/ha) in early summer when crabgrass was relatively immature provided exceptional (91 to 99 percent) control and eliminated weeds as a problem for the remainder of the season. Effective control of mature crabgrass with fenoxaprop (0.28 or 0.56 kg/ha) can be achieved if rainfall or irrigation is not limiting and crabgrass is growing vigorously.

Publication of this paper sponsored by Committee on Roadside Maintenance. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01418784

pp 1-4

1986

Transportation Research Record

0309040698

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References (8) ; Tables (4)

Control; Grasses; Herbicides; Landscape maintenance; Measures of effectiveness; Weed control

Effectiveness

Design; Environment; Highways; Maintenance and Preservation; I61: Equipment and Maintenance Methods

TRIS, TRB

Oct 31 1987 12:00AM

• A VEGETATION MANAGEMENT PROGRAM FOR ALABAMA HIGHWAY ROADSIDES
• AERIAL SEEDING
• CHEMICAL MOWING IN INDIANA: THREE YEARS OF SUCCESS
• DO WHITE-TAILED DEER AVOID RED? AN EVALUATION OF THE PREMISE UNDERLYING THE DESIGN OF SWAREFLEX WILDLIFE REFLECTORS (DISCUSSION AND CLOSURE)
• FISH PASSAGE THROUGH POPLAR GROVE CREEK CULVERT, ALASKA
• PILOT STUDY OF SMALL-SCALE MONITORING METHODS OF HERBICIDE RESIDUES IN SOIL AND WATER
• RIGHT-OF-WAY FORESTRY FOR A 6.7-MILE SECTION OF I-95 IN MAINE
• ROADSIDE VEGETATION MANAGEMENT IN IDAHO
• USE OF ROADSIDE PLANTINGS BY SONGBIRDS FOR NESTING