Full TGIF Record # 38921
Item 1 of 1
Publication Type:
i
Report
Author(s):Murphy, T. R.; Johnson, B. J.
Author Affiliation:Crop and Soil Sciences Department, The University of Georgia, Griffin, GA 30223-1797
Title:Winter annual weed control in bermudagrass
Meeting Info.:48th Annual Meeting, Memphis, TN, January 16-18, 1995
Source:Southern Weed Science Society Proceedings. Vol. 48, January 1995, p. 99-100.
Publishing Information:Champaign, IL: Southern Weed Science Society.
# of Pages:2
Keywords:TIC Keywords: Poa annua; Weeds; Cynodon dactylon; Weed control; Preemergence herbicides; Postemergence herbicides
Abstract/Contents:"Various species of winter annual weeds are commonly found in common bermudagrass [Cynodon dactylon (L.) Pers.] during the winter and spring months. Traditionally, winter annuals have been controlled in non-overseeded bermudagrass turfs with triazine herbicides and herbicide mixtures that contain 2, 4-D. However, turfgrass managers have increasingly become concerned as to the availability of these herbicides in the future years. Experiments were conducted in 1993 and 1994 to evaluate the potential of various preemergence and postemergence herbicides for controlling winter annual weeds. All experiments were conducted on non-overseeded common bermudagrass fairways. Preemergence herbicides were applied on September 11, 1992 and September 13, 1993. Postemergence herbicides were applied in late January to mid-February in 1993 and 1994, respectively. Weed control and common bermudagrass tolerance ratings were recorded in March and April of each repective year. Herbicide treatments were arranged in a randomized complete block design with four replications. Treatment means were separated with LSD at the 0.05 level. Oryzalin at 1.5 and 2.0 lb/A, benefin at 3.0 lb/A, prodiamine at 0.75 and 1.0 lb/A, pendimethalin at 3.0 lb/A, oxadiazon at 3.0 and 4.0 lb/A and dithiopyr at 0.25 and 1.0 lb/A effectively controlled annual bluegrass (Poa annua L.). Metolachlor at 2.0 and 4.0 lb/A and isoxaben at 0.75 and 1.0 lb/A did not control annual bluegrass. Lawn burweed [Soliva pterosperma (Juss.) Less.] and purple cudweed (Gnaphalium purpureum L.) were controlled only by isoxaben. Only a slight (10 to 20%) effect on spring transition was observed in 1993 for the following herbicides: oryzalin at 2.0 lb/A, benefin at 3.0 lb/A, dithiopyr at 1.0 lb/A, pendimethalin at 3.0 lb/A and metolachlor at 4.0 lb/A. Flazasulfuron at 0.04 and 0.09 lb/A plus nonionic surfactant (0.5% v/v) controlled annual bluegrass in both years and corn speedwell in one of two years. Clopyralid at 0.5 lb/A, and triclopyr + clopyralid at 0.75 + 0.25 lb/A did not control corn speedwell. Lawn burweed and knawel control with fluroxypyr and triclopyr + clopyralid was equivalent to that obtained with 2, 4-D + MCPP + dicamba at 1.0 + 0.5 + 0.1 lb/A and 2, 4-D + 2, 4-DP at 0.9 + 0.9 lb/A. Clopyralid did not control knawel. Fluroxypr at 0.5 lb/A was the only postemergence herbicide that affected common bermudagrass spring transition at the April evaluations. No effect of fluroxypyr was observed at the mid-May evaluation."
Language:English
References:0
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Murphy, T. R., and B. J. Johnson. 1995. Winter annual weed control in bermudagrass. South. Weed Sci. Soc. Proc. 48:p. 99-100.
Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=38921
If there are problems with this record, send us feedback about record 38921.
Choices for finding the above item:
Find Item @ MSU
MSU catalog number: SB 611 .S6 v.48
Request through your local library's inter-library loan service (bring or send a copy of this TGIF record)