Insects Injurious to the Fruit of the Apple 1903 



crop will suffer from the attacks of second-brood larvse, and under such 

 circumstances, the late spray is more important than in years when growth 

 has been more backward in the early part of the season. Here again, it 

 is often desirable that poison be applied in combination with a fungicide 

 in order to prevent late infections of apple scab. 



Spraying schedule for the codling moth 



A. When the last of the petals are falling 



Arsenate of lead, 4 to 6 pounds in 100 gallons of lime-sulfur (32° 

 Baume) diluted i to 40. This is the most important spray for 

 the control of codling moth and should never be omitted. 



B. About three weeks after the petals have fallen 



Arsenate of lead, 4 to 6 pounds in 100 gallons of lime-sulfiu- (32° 

 Baume) diluted i to 40. 



C. About August I 



Arsenate of lead, 4 to 6 pounds in 100 gallons of lime-sulfur (32° 

 Baume) diluted i to 40. 



the apple maggot 



Rhagoletis pomonella Walsh 



Summer and early fall apples in New York vState are often badly infested 

 by small whitish maggots (Fig. 102) 

 about one-fourth inch in length, which 

 tunnel through the fruit in all direc- 

 tions. Although simmier and early 

 fall varieties are most susceptible, 

 winter apples are often seriously in- 

 jured. Subacid and sweet varieties 

 are most liable to infestation, but acid 

 varieties, such as Baldwin, Rhode 

 Island Greening, and Oldenburg, and 

 even crab apples are sometimes at- 

 tacked. Fameuse is very susceptible , , . 



, ^1 , 4. • 4.1, Fig. 102. — Lateral and dorsal view of 



to mjury by the apple maggot m the Jull-grown apple maggots. Enlarged 



Lake Champlain district. 



Life history. — The parents of this maggot are two-winged blackish 

 flies somewhat smaller than the house fly, with yellowish head and legs 

 and three or four transverse whitish bands on the abdomen. The wings 

 are marked with four confluent brownish bands (Fig. 103). In New York 

 these flies first appear in the orchard in early July, usually from about 

 the fourth to the middle of the month, and are common until the latter 



