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In some parts of the country the grosbeak feeds largely on the plum scale, the hickory scale, the locust and oak scales and on the tulip scale, which is very destructive to shade trees. The black grosbeak is another variety that deserves encouragement in every way, for it eats the chrysalis of the codling-moth that is so serious a foe to our apple crop.
In the fall they can be spread, and they at least make one of the best of fertilizers. The codling-moth, or apple-worm, is another enemy that should be fought resolutely, for it destroys millions of bushels of fruit. In the latitude of New York State this moth begins its depredations about the middle of June.
The Apple Codling-Moth. Bulletin 41. Price 20c. The Gipsy Moth and How to Control It. Bulletin 275. The Brown-tail Moth and How to Control It. Bulletin 264. The Spring Grain Aphis or Green-Bug. Bulletin 93. The Army-Worm. Bulletin 4. The Hessian Fly. Bulletin 70. The Chinch-Bug. Bulletin 17. The Principal Household Insects of the U. S. Bulletin 4. Insects Affecting Domestic Animals. Bulletin 5.
The various leaf worms attack the life of the tree also. The grape-leaf skeletonizer eats every particle of green from the leaves, leaving only the veins. The canker-worms and the destructive tent-caterpillars also cause the death of many fruit trees. Of insects which attack the fruit, the list is long. The codling-moth of the apple causes a greater money loss than any other enemy of fruits.
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