INSECTS INJURIOUS TO PEACH, PLUM AND CHERRY 583 



destruction. There are two generations a year, the summer brood 

 appearing in the latter half of August and the other hibernating 

 over winter. 



Control. The same methods are advised as for the fruit-tree 

 bark-beetle, which, see. 



The Peach Lecanium * 



The presence of the "terrapin scale," as this species is often 

 called, is usually indicated by the sooty appearance of the branches 

 and foliage of affected trees. This is due to the fact that the 

 scales excrete considerable honey-dew, which covers the bark and 



FIG. 514. The peach lecanium or terrapin scale (Eulecanium nigrofasciatum 

 Pergande): adults at left, natural size and much enlarged; young at 

 right, and unfertilized female at center much enlarged. (After Howard. 

 U. S. Dept. Agr.) 



leaves, and on which a sooty fungus propagates. It is a common 

 species throughout the eastern United States and also attacks 

 the apple, maple, sycamore, linden and birch, but is most injurious 

 to peach and plum. The hibernating, partly grown, female scale 

 found on the bark in winter, is about one-twelfth inch long, 

 hemispherical, and of a reddish color mottled with radiating 

 streaks of black, particularly about the margin. Sometimes 



* Eidecanium nigrofasciatum Pergande. Family Coccidce. See J. G. 

 Sanders, Circular 88, Bureau of Entomology, U. S. Dept. Agr. ; A. L. Quain- 

 tance, Yearbook U. S. Dept. Agr., 1905, p. 340; T. B. Symons and E. N. Cory, 

 Bulletin 149, Md. Agr. Exp. Sta., and F. L. Simanton, Bulletin 351, U.S. 

 Dept, Agr. 



