Population dynamics of broadleaf weeds in turfgrass as influenced by chemical and biological control methods

被引:15
作者
Abu-Dieyeh, Mohammed H. [1 ]
Watson, Alan K. [1 ]
机构
[1] McGill Univ, Dept Plant Sci, Quebec City, PQ H9X 3V9, Canada
关键词
2,4-D; Sclerotinia minor; biological control; population dynamics; seed bank; turfgrass;
D O I
10.1614/WS-06-144
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
A 3-yr field study was conducted to determine the effect of a biological control agent, Sclerotinia minor Jagger, and a common herbicide, Killex, on the population dynamics of dandelion and other broadleaf species and on the dandelion seed bank. Treatments were applied as one spring, one early autumn, or a spring plus an early autumn treatment per year. The response of the dandelion Population to a spring herbicide treatment was similar to two applications per year (spring and early autumn). Significantly less dandelion control Occurred after the first early autumn application of the herbicide. Two weeks after application, spring or early autumn treatments with S. minor were equally effective in Suppressing dandelions. In the second year of the two applications per year of S. minor treatment, weed control was equivalent to the herbicide. By the third year of the one spring application of S. minor, weed control was equivalent to the herbicide. Generally over the study period, the early autumn application of S. minor was less effective than the spring or the spring and early autumn applications. The S. minor treatments significantly reduced the dandelion seed bank, and this effect was not significantly different from the Killex herbicide treatment. The rate, frequency, and seasonal tinting of application had no effect on the dandelion seed-bank size, but terminating the application would gradually replenish the seed bank. Populations of white clover, broadleaf plantain, birdsfoot trefoil, and common ragweed were similarly suppressed by either the S. minor or the herbicide treatments. Yellow woodsorrel significantly increased after 1yr of herbicide treatment compared with the S. minor and untreated control treatments, indicating a possible weed species shift. Turf quality was improved because Of the herbicide and S. minor treatments, but grass injury and smooth crabgrass invasion were recorded in 17% of herbicide-treated plots.
引用
收藏
页码:371 / 380
页数:10
相关论文
共 69 条
[1]   Efficacy of Sclerotinia minor for dandelion control:: effect of dandelion accession, age and grass competition [J].
Abu-Dieyeh, M. H. ;
Watson, A. K. .
WEED RESEARCH, 2007, 47 (01) :63-72
[2]   Sclerotinia minor advances fruiting and reduces germination in dandelion (Taraxacum officinale) [J].
Abu-Dieyeh, MH ;
Bernier, J ;
Watson, AK .
BIOCONTROL SCIENCE AND TECHNOLOGY, 2005, 15 (08) :815-825
[3]   Impact of mowing and weed control on broadleaf weed population dynamics in turf [J].
Abu-Dieyeh, Mohammed ;
Watson, Alan .
JOURNAL OF PLANT INTERACTIONS, 2005, 1 (04) :239-252
[4]   Effect of turfgrass mowing height on biocontrol of dandelion with Sclerotinia minor [J].
Abu-Dieyeh, Mohammed H. ;
Watson, Alan K. .
BIOCONTROL SCIENCE AND TECHNOLOGY, 2006, 16 (05) :509-524
[5]   Grass overseeding and a fungus combine to control Taraxacum officinale [J].
Abu-Dieyeh, Mohammed H. ;
Watson, Alan K. .
JOURNAL OF APPLIED ECOLOGY, 2007, 44 (01) :115-124
[6]  
ABUDIEYEH MH, 2006, THESIS MCGILL U MONT
[7]  
Aldrich RJ., 1984, Weed-Crop Ecology: Principles in Weed Management
[8]  
[Anonymous], 2003, WEED ECOLOGY NATURAL
[9]   WEED SEEDBANK RESPONSE TO TILLAGE, HERBICIDES, AND CROP-ROTATION SEQUENCE [J].
BALL, DA .
WEED SCIENCE, 1992, 40 (04) :654-659
[10]   THE ROLE OF TURFGRASSES IN ENVIRONMENTAL-PROTECTION AND THEIR BENEFITS TO HUMANS [J].
BEARD, JB ;
GREEN, RL .
JOURNAL OF ENVIRONMENTAL QUALITY, 1994, 23 (03) :452-460