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Mercy Olmstead, Timothy W. Miller, Callie S. Bolton and Carol A. Miles

( Delmas and Grant, 2010 ). Although there are many benefits to using cover crops, their primary use has been as an alternative weed suppression technique in organic and conventional vineyards worldwide ( Dastgheib and Frampton, 2000 ; Liebman and Davis

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-growth and that proper rootstock selection is critical. Summer Cover Crops for Weed Suppression Cover crops can be used as a sustainable weed management tool in vegetable production. Kruse and Nair (p. 407) investigated impacts of short-duration summer

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Michael J. Adler and Carlene A. Chase

be used during summer fallow periods to suppress weeds through resource competition ( Collins, 2004 ); however, it is likely that weed suppression by these cover crops may also be in part the result of allelopathy. Allelopathy in velvetbean has been

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Elsa Sánchez, William J. Lamont Jr and Michael D. Orzolek

have evaluated the effectiveness of newspaper mulches for weed suppression in various crops in field settings ( Calkins et al., 1996 ; Carter and Johnson, 1988 ; Grassbaugh et al., 2004 ; Monks et al., 1997 ; Munn, 1992 ; Warmund et al., 1995

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Sanjeev K. Bangarwa, Jason K. Norsworthy and Edward E. Gbur

) crop ( Boydston and Hang, 1995 ). ‘Caliente’ mustard has the capacity to produce a high amount of glucosinolates, the precursor of isothiocyanates, which makes it a promising cover crop for weed suppression ( Norsworthy et al., 2005 ). Chemical weed

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Virender Kumar, Daniel C. Brainard and Robin R. Bellinder

) found that brown mustard residue was effective at reducing weeds in a subsequent snap bean crop. Yellow mustard (var. Idagold) has high glucosinolate content and is therefore thought to have good weed-suppression potential ( Haramoto and Gallandt, 2005b

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-chemical options. By choosing woodchips from trees with allelochemicals, woodchip mulches represent an environmentally friendly weed suppression method. Using container-grown dogwood and crape myrtle plants sown with large crabgrass and pigweed, Ferguson et al. (p

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Eric B. Brennan and Jim E. Leap

Establishing a uniform and sufficiently dense cover crop stand as soon as possible after planting is a critical first step to enable the cover crop to provide desirable services such as weed suppression, nitrate scavenging, and erosion control. Weed

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Muhammad Mansoor Javaid, Manish Bhan, Jodie V. Johnson, Bala Rathinasabapathi and Carlene A. Chase

’s allelopathic properties for weed suppression in horticultural crop production systems, we examined the phytotoxicity of its aqueous foliar extracts and ground, dried residues in an earlier study ( Adler and Chase, 2007 ). Both sunn hemp extracts and ground

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Fertility Effects on Weed Suppression and Community Composition L.K. Hunsberger 1 and M.R. Ryan 2 ; 1 Extension Educator, University of Maryland Extension, P.O. Box 219, Snow Hill, MD 21863; 2 PhD Candidate, Ecology Program, The Pennsylvania State