# Bumps on the Leaves of Pecan Trees
Pecan (Carya illinoensis) is a deciduous tree that grows up to 70 feet tall. The tree is native to North America and thrives best in regions with the long summers and moderate winters. Pest-related damage to trees causes the appearance of bumps on foliage.
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Identification
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Pecan trees are susceptible to infestation from the pecan phylloxera, a small insect that resembles an aphid. The pest overwinters in the form of eggs inside dead female bodies encased in galls on tree foliage. Mature insects start to emerge during May and June, and start to damage new foliage.
Damage
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The pests feed on foliage with their sucking mouths and lead to the development of galls or bumps. These bumps act as enclosures within which the mother dies after laying her eggs. The nymphs hatch and feed in these galls until they mature. Pest infestation heavily damages crops, and can even weaken or disfigure the tree.
Control
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Timely application of insecticides is among the best control options. The ideal time to apply a recommended insecticide is at the time of bud break with 1/2 to 3/4 inches of new growth on the tree. In case of heavy infestation, reapply insecticide 7 to 10 days later.
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