. Manual of fruit insects. the rate of 4 pounds in 100 gallons. References Taylor, Jour. Ec. Ent. I, pp. 1908. Coi. Agr. Exp. Sta. Bull. 133, pp. 32-37. 1908. Va. Truck Exp. Sta. Bull. 2, pp. 30-32. 1909. As a spinach pest. The Terrapin ScaleLecanium nigrofasciatum Pergande This native enemy of the peach and plum is generally dis-tributed throughout the United States east of the Mississippiand also occurs in Minnesota, Missouri, Arkansas and addition to the peach and plum, it attacks, among others,the apple, olive, maple, basswood, birch and blueberry. Pre-vious to 1898 this s
. Manual of fruit insects. the rate of 4 pounds in 100 gallons. References Taylor, Jour. Ec. Ent. I, pp. 1908. Coi. Agr. Exp. Sta. Bull. 133, pp. 32-37. 1908. Va. Truck Exp. Sta. Bull. 2, pp. 30-32. 1909. As a spinach pest. The Terrapin ScaleLecanium nigrofasciatum Pergande This native enemy of the peach and plum is generally dis-tributed throughout the United States east of the Mississippiand also occurs in Minnesota, Missouri, Arkansas and addition to the peach and plum, it attacks, among others,the apple, olive, maple, basswood, birch and blueberry. Pre-vious to 1898 this species was confused with the European peachscale (Lecanium persicce Fabricius). As a peach pest it hascaused considerable loss in the orchards of southern Pennsyl-vania, New Jersey and Maryland. The injury to the treeitself is not serious, but the principal loss comes from the honey-dew secreted by the scales. This sweet, sticky substance accu-mulates on the tree and serves as a medium for the growth of a 294 FBIIT INSECTS. sooty black fungus that renders the fruit practically \\dnter is passed by the fertiUzed females on the smallerbranches. These scales are about yV inch in length, nearlycircular in outUne and very convex ■with an elongate reddisharea on the back and radiating black Hues along the edge of the scale is sUghtly ridged(Fig. 250). Indi\aduals vary greatly incolor from nearly pure black to orange-red. Gro^\i,h is resumed in early spring,and by the last of INIay the females areabout J inch in length. Eggs are formed,and the minute straw-colored flattened youngescape from beneath the old scale and es-tablish themselves on the leaves. Hatch-ing continues for a period of about 6 weeksduring June and July. Winged males ap-pear during August and fertilize the females;the latter soon migrate to the bark of thesmaller branches, where the winter is spent. There is only onegeneration a Recent experiments in Maryland have shown that
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