. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). The Cornell Reading-Courses PUBLISHED BY THE NEW YORK STATE COLLEGE OF AGRICULTURE AT CORNELL UNIVERSITY B. T. Galloway, Dean COURSE FOR THE FARM, ROYAL GILKEY. Supervisor Entered as second-class matter at the post office at Ithaca, New York VOL. IV. No. 84 MARCH 15, 1915 INSECT SERIES No. 1 INSECTS INJURIOUS TO THE FRUIT OF THE APPLE C. R. Crosby a
. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). The Cornell Reading-Courses PUBLISHED BY THE NEW YORK STATE COLLEGE OF AGRICULTURE AT CORNELL UNIVERSITY B. T. Galloway, Dean COURSE FOR THE FARM, ROYAL GILKEY. Supervisor Entered as second-class matter at the post office at Ithaca, New York VOL. IV. No. 84 MARCH 15, 1915 INSECT SERIES No. 1 INSECTS INJURIOUS TO THE FRUIT OF THE APPLE C. R. Crosby and M. D. Leonard. N' 'EARLY five hundred species of insects have been reported as feeding on the apple; however, a relatively small number of species are responsible for the heavy losses. In this lesson are discussed only the more important insects that attack the fruit itself: namely, codling moth, apple maggot, apple redbugs, fruit-tree leaf-roller, and green fruit- worms. The San Jose scale often stunts the fruit and disfigures it with red spots; but, as the more important injury is to the twigs and branches, this insect will be discussed in a future lesson. The plum curculio also causes the fruit to become knotty and deformed; it will be treated as a plum pest. Owing to the stringent requirements of the apple packing law of 1914, fruit growers have been forced to take a greater interest in producing fruit free from all blemishes caused by insects. In order to produce clean fruit it is necessary that the fruit grower should be famihar with the various types of injury caused by the more important insect enemies of his crop, and that he should be acquainted with the more important facts in their life history. Most injurious insects have at least one vulnerable point in their life cycle when it is possible to do the most effective work in destroying them. .Familiarity with the various stages of each pest is necessary in order to ascertain which are these weak spots and when the
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