Pesticide/Herbicide Toxicity

Pest/Disease: Pesticide/Herbicide Toxicity

Pest Type: Non-infectious plant disease

Major Identifying Features: Malformed leaves, distorted leaves and shoots, stunted shoots and roots, chlorotic, necrotic, spotted leaves, leaf symptoms with preemergence  herbicides, postemergence herbicides can damage entire landscape, broadleaf herbicides cause twisted shoots and discolored leaves, yellow or brown leaf spots, chlorosis or necrosis, leaf curling and stunting

Life Cycle: N/A

Pest/Disease Rating: N/A

Management Rating: Moderate to difficult

Host/Season/Outbreak Information: When label directions are not followed, applying excessive rates of herbicides and/or pesticides

Damage Information: Injured landscapes, dead and injured plants,

Management Options: Investigation on when and where pesticides/herbicides have been applied, lab tests, mechanical control by avoiding herbicides and pesticides, cultural care by proper irrigation, incorporation with charcoal, organic matter, mulch


Dreistadt, Steve H., and Jack Kelly. Clark. Pests of Landscape Trees and Shrubs: An Integrated Pest Management Guide. Oakland, CA: U of California, Division of Agriculture and Natural Resources, 1994. Print.


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