. Eastern forest insects. Forest insects. of 25 to 30 mm. There is an orange band on the fourth abdominal segment and a tuft of orange scales at the tip of the abdomen. Mature larvae are white to pink and 25 mm. long. Eggs are deposited on the bark during June and July, usually near a wound, on old scars, or just below a branch. The larvae bore in the inner bark and sapwood, excavating more or less transverse tunnels and cause copious flows of pitch. This pitch accumulates in masses 3 to 4 inches in diameter at the entrance hole. Pupation occurs in the pitch mass, and when the moth emerges the
. Eastern forest insects. Forest insects. of 25 to 30 mm. There is an orange band on the fourth abdominal segment and a tuft of orange scales at the tip of the abdomen. Mature larvae are white to pink and 25 mm. long. Eggs are deposited on the bark during June and July, usually near a wound, on old scars, or just below a branch. The larvae bore in the inner bark and sapwood, excavating more or less transverse tunnels and cause copious flows of pitch. This pitch accumulates in masses 3 to 4 inches in diameter at the entrance hole. Pupation occurs in the pitch mass, and when the moth emerges the empty pupal case is left sticking out of the mass. The life cycle requires 2 to 3 years. Although not a killer of trees, this species causes some lumber degrade as a result of its activities. No practical control methods are known for use on forest grown trees. Borers in shade, ornamental, or park trees may be removed with a knife. The persimmon borer, Sannina iiroceriformis Walker, occurs from southern Maryland to Kansas, Texas, and the Gulf Coast and feeds as a larva in the solid wood of the base and tap roots of persimmon. The adult is mostly bluish-black and has a wingspread of 28 to 32 mm. Full-grown larvae are up to 30 mm. long. Trees growing in cut over areas and in hedge rows are particularly sub- ject to infestation. Young trees in nurseries are also damaged seriously at times. The life cycle requires 2 or 3 years. The lilac borer, Podosesia syringiae syringiae (Harris) (fig. 159), occurs throughout the eastern half of the United States and Canada. It attacks lilac and privet and other trees and shrubs of Oleaceae. The adult has a wingspread of 26 to 38 mm. Southern adults have the thorax and abdominal segments two and three almost entirely chestnut-red, only narrowly edged with black. Northern ones have these parts mostly brown-black with edgings of yellow or chestnut-red. The larvae bore into the main stems of lilac and privet, causing them to wilt, take on an unhea
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Keywords: ., bookcentury1900, bookcollectionbiodive, booksubjectforestinsects
