. Cooperative economic insect report. Beneficial insects; Insect pests. 1026 - spittlehug, Aphrophora parallelaiSaLy), was plen- tiful in many other areas. Browning of Virginia and pitch pine foliage by the pine needle miner, Eccoteleia pinifoliella {Ch&mh.), was comnnon along most of the ridgetops from Hot Springs to Staunton, Virginia, and the pine leaf aphid, Pineus pinifoliae (Fitch), which alternates between red spruce and white pine, produced the heaviest galling of red spruce since 1951. Hardwood Borers Cause Serious Lumber Degrade Hardwood insects kill far fewer trees than do pine
. Cooperative economic insect report. Beneficial insects; Insect pests. 1026 - spittlehug, Aphrophora parallelaiSaLy), was plen- tiful in many other areas. Browning of Virginia and pitch pine foliage by the pine needle miner, Eccoteleia pinifoliella {Ch&mh.), was comnnon along most of the ridgetops from Hot Springs to Staunton, Virginia, and the pine leaf aphid, Pineus pinifoliae (Fitch), which alternates between red spruce and white pine, produced the heaviest galling of red spruce since 1951. Hardwood Borers Cause Serious Lumber Degrade Hardwood insects kill far fewer trees than do pine insects, but wood borers cause tremendous losses in value in living trees. External symptoms of infestation are in- distinct or absent and the damage often goes unnoticed until timber is cut or logs are sawed (fig. 12). The more important wood borers causing damage and degrade of lumber in 1959 are the roundheaded and flatheaded borers and the carpenter Figure i- caused by wood borers (left and center) re- duce value of boards cut from oaks in Southern States. Caterpillars Strip Southern Hardwoods During the spring of 1959 the forest tent caterpillar, Malacosoma disstria Hbn., stripped large areas of bottom-land hardwoods in southern Louisiana and Alabama and parts of Mississippi. Hardwoods suffered severe damage along the West Virginia-Virginia State line. In Louisiana, feeding was lighter in the 40,000-acre area infested last year, although defoliation of tupelo and blackgum was intense west of New Orleans. Caterpil- lars spun their cocoons in early May and moths were in flight 2 weeks later. By June, trees had refoliated but leaves were smal- ler and less abundant than normal. Sweet- gum, river birch, willow oak, and overcup oak on 150,000 acres along the Alabama River bottom were heavily defoliated. Many sweetgums as far north as Jackson, Ala- bama, were completely stripped. Infesta- tions also were seen in Clarke and Wash- ington Counties, Alabama, and Wayne County
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