Key to Pecan Insects
Reading edition
INSECTS ATTACKING THE NUTS
Olive-green caterpillars up to ½ inch long feeding in the nuts, or later in the season, in the shucks page 10 Pecan Nut Casebearer
White caterpillars up to ⅜ inch long tunneling in the shucks page 11 Hickory Shuckworm
White legless grubs feeding in the nuts in late summer page 12 Pecan Weevil
Green or brown bugs sucking the sap from the nuts page 12 Stink Bugs and Plant Bugs
INSECTS ATTACKING THE FOLIAGE
Soft-bodied yellow insects producing honeydew or small black insects causing yellow blotches on the foliage page 13 Aphids
Tiny green arthropods in webs near the midrib, leaves appear scorched page 13 Mites
Caterpillars feeding in gray cases about ½ inch long in the spring; small winding blotches produced in the leaves in the summer page 14 Pecan Leaf Casebearer
Olive-green caterpillars tunneling in the shoots in the early spring page 10 Pecan Nut Casebearer
Tiny caterpillars in light brown cigar-shaped cases about ¼ inch long page 15 Pecan Cigar Casebearer
Galls on the leaves, twigs and nuts page 14 Pecan Phylloxera
Leaves eaten in the early spring by a light green caterpillar which leaves the midribs and veins intact page 14 Sawfly
Beetles feeding on the foliage at night page 15 May Beetles
Caterpillars in large white webs encasing entire branches page 15 Fall Webworm
Caterpillars with long soft hairs feeding in colonies on the foliage without producing webs page 16 Walnut Caterpillar
Dark gray, active caterpillars up to 3 inches long feeding on the foliage in early spring page 16 Pecan Catocala
Masses of frothy white foam enclosing tiny, light green insects in the spring page 16 Pecan Spittlebug
Tiny greenish caterpillars feeding in the terminals and axils of the buds on young pecan trees page 16 Pecan Bud Moth
INSECTS ATTACKING THE LIMBS, TRUNK AND TWIGS
Beetle girdling twigs and limbs in late summer and fall page 17 Pecan Twig Girdler
Holes about ⅛ inch in diameter in dying limbs page 17 Red-shouldered Shot-hole Borer
White borers with an enlargement behind the head tunneling underneath the bark of trunk and limbs page 17 Flatheaded Borers
Limbs encrusted with scales, which closely resemble the color of the bark page 18 Obscure Scale