University of Maryland Extension

Plant Disease, Weed & Insect Identification

Due to the COVID-19 pandemic, we have changed our procedures for plant disease, weed and insect identification.

There is a table outside our office where you can leave your sample/insect. You will need to fill out a submission form. There will be some on our table or you can download one from our website. One of our agents will look at your sample and then give you a call.

Sample Instructions:

A reliable species level identification requires a complete sample. The ideal sample consists of the entire plant or insect. Collect fresh specimens.

For herbaceous plants, bring the entire plant with the roots intact. Wrap only the roots in plastic.

For woody plants, bring ½ to 1 inch diameter branches with leaves pressed flat between cardboard or paper. Do not add water to any submitted samples.

For insects, bring them in a sealed bag or container.

Drop-off Instructions: Place sample on cart outside the Extension office front entrance.

Plant Disease/Weed/Insect ID Submission Form

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