White Pine Aphid

White Pine Aphid Frank A. Hale, Professor originally developed by Jaime Yanes, Jr., former Assistant Pro fessor and Harry E. Williams, Pro fessor Emeritus Entomology and Plant Pathology SP290-P The white pine aphid, Cinara strobi (Fitch), occurs wherever Eastern white pines are grown. This pest uses its needle-like mouthparts to suck sap rom twigs and branches. Severely inested parts o trees turn yellow and drop their needles. White pine aphid adults are large (¼ inch long), long- legged, and spider-like in appearance. The body is shiny dark brown with a white stripe down the middle o the back. White powdery spots on the sides are oten present. During the all, winged emales lay blackish eggs, end- to-end, in a row o eight or more on the needles. This aphid usually overwinters in the egg stage; however, i the weather is mild, some individuals rom the last generation survive through the winter. Eggs hatch in the spring and resulting wingless emales produce living young. As the season pro- gresses, several overlapping generations may occur. By late summer, large populations may be present. Droughty weather at this time will increase needle drop. Each new generation moves to resh sites on the tree to eed. Adults o the last generation o the summer pro duce overwintering eggs in the all. Heavy inestations o aphids may kill young trees or may cause reduced growth. As the aphid eeds, it excretes honeydew. This sticky substance is the excrement rom the aphid. A black sooty mold is commonly ound growing on the honeydew. Sooty mold reduces the quality o trees and may reduce the amount o sunlight available to the leaves. Ants may also be ound eeding on the honeydew. Insects White Pine Aphid

White Pine Aphid

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