Black Turpentine Beetle
Dendroctonus terebrans

The black turpentine beetle is found from New Hampshire south to Florida and from West Virginia to east Texas. Attacks have been observed on all pines native to the South. This beetle is most serious in pine naval stores, pines stressed for lightwood production, and damaged pines in urban areas.

Identification:

The adult insect is dark brown to black in color and 3/8 inch (10 mm) in length. The posterior end is rounded. Full grown larvae are white with a reddish brown head and about 1/3 inch (8 mm) long. Pupae are about 1/4 inch (6 mm) in length and yellowish white.

Injury:

Black turpentine beetles attack fresh stumps and the lower trunk of living pines. Initial attacks are generally within 2 feet (60 mm) of the ground. Attacks are identified by white to reddish-brown pitch tubes about the size of a half dollar. The pitch tubes are located in bark crevices on the lower tree bole, usually below a height of 10 feet (3 m). Infested pines are often attacked by other bark beetles.

Biology and History:

Adult beetles bore into the cambium and construct galleries which usually extend downward. Eggs are laid in clusters and hatch in 10 to 14 days. Larvae feed side by side, excavating a large continuous area. The life cycle takes from 2 1/2 to 4 months, depending on the season. There are two to four generations a year.