Pratylenchus penetrans (Cobb) Filipjev & Schuurmans-Stekhoven
Distribution: Widespread; common to all fruit-growing regions in eastern North America.
Root-lesion nematodes (A) are microscopic, migratory endoparasites that feed on the root systems of many crops. Affected trees appear stunted, may exhibit chlorosis or yellowing of the leaves, and have poor yields; young trees may be killed. Newly infected roots typically show a reddish brown, elongated lesion in the vicinity of invasion. Severely infected root systems lack the fine-texture, fibrous roots or may have tufts of necrotic roots that resemble a witches' broom. Disease is common on light-textured soils.