Fir

Fir trees in Iowa rarely contract diseases, but more commonly experience stress from the environment.

Overwatering-One of the most common problems seen in the Plant and Insect Diagnostic Clinic occurs when fir trees are planted into poorly drained soils, when experiencing wet growing seasons or trees are being over irrigated. This can cause needles to loose/change color and sometimes develope small bumps on them, a phenomenon called edema.

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