Author Archive | Justin Cooley

Damage to tomatoes grown in contaminated compost (Photo credit: Whitney Cranshaw, Colorado State University, Bugwood.org)

Herbicide Residue in Manure, Hay, and Compost

What is Herbicide Residue? In recent weeks, the Oregon Dept of Agriculture announced the discovery of contaminated soil and compost materials from an herbicide known as clopyralid.  This contaminated material was distributed to gardeners in the region causing significant damage to garden plants and landscapes.  This unfortunate event helps to raise awareness of the persistence […]

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