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Importance - In the South, reproduction weevils are the most serious insect threat to newly planted pines, particularly on recently cut-over sites. The pitch-eating weevil is more common along the Gulf Coast. Feeding has been reported on most coniferous species, and all species of southern pines are susceptible to attack. Seedling mortality in plantations has been recorded as high as 90 percent, and 30 to 60 percent mortality is not uncommon.
Identifying the Insect - Adult weevils are oblong, robust, black to reddish brown, and about 1/2 inch (12 mm) long. The wing covers have small, scattered patches of yellowish hairs. The pitch-eating weevil appears darker because the hairs on the wing covers are sparser and shorter.
Identifying the Injury - Adult weevils feed on the tender bark of seedlings, twigs, or larger trees. Small, irregular feeding patches in the bark are characteristic of weevil damage. Heavy feeding may girdle the stem, causing wilting or death. Feeding below the root collar and on the roots is common.
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Adults
Photo by Gerald Lenhard, LSU |
