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Organic weed control for dandelions
Date:9/8/2009

s on dandelion populations in an established Kentucky bluegrass lawn in field experiments at the Hancock Turfgrass Research Center in East Lansing. The team tested red maple (Acer rubrum), silver maple (A. saccharinum), sugar maple (A. saccharum), high sugar content sugar maple, and red oak (Quercus rubra) in coarse and fine particle sizes and differing application rates.

Mulch applications were made in fall and data collected beginning in spring on Kentucky bluegrass spring green-up and common dandelion plant counts. The data showed that the high application rate, regardless of tree genus or species, resulted in the highest green-up ratings. Common dandelion plant counts after one and two mulch applications at the high rate showed that up to 80% and 53% reduction was achieved, respectively.

Although the results from the research do not suggest that mulched leaves can be used exclusively as an alternative to herbicides to provide high-end weed control, Kowalewski stated: "If home owners want to incorporate this practice into an annual maintenance program, the findings of this study suggest that an increased spring green-up and a reduction in common dandelion population could be observed."


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Contact: Michael W. Neff
mwneff@ashs.org
703-836-4606
American Society for Horticultural Science
Source:Eurekalert

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