CHAPTER II 

 APPLE INSECTS — THE FRUIT 



Nearly five hundred species of insects have been recorded as 

 feeding on the apple, but fortunately, the greater part of them 

 do not cause enough damage to be considered of economic 

 importance and are not treated in this book. Many of the 

 most important apple insects have come to ue from foreign 

 lands ; the codlin-moth and bud-moth from Europe, and the 

 San Jose scale from China ; others fed originally on the wild 

 thorn, as the apple maggot and apple curculio, but have found 

 in our orchards an abundance of food and other conditions 

 better to their liking. Many apple insects also attack the 

 pear and quince. 



In spraying apples the insecticide can usually be combined 

 to advantage with a fungicide for the control of apple scab. 

 The following spraying schedule for the San Jose scale, codlin- 

 moth, bud-moth, case-bearers, and apple scab is intended for 

 New York State conditions, but with modifications might be used 

 in other regions. 



Dormant spray. 



As the leaf hiids begin to show green 



Lime-sulfur (32 degrees Beaume) , diluted 1 to 8, for San Jose 

 scale, oyster-shell scale and blister-mite ; add two pounds 

 arsenate of lead to 50 gallons of mixture for bud-moth. 



Summer sprays. 



A. — As blossom buds begin to show pink 

 Lime-sulfur (32 degrees Beaume), diluted 1 to 40, for apple 

 scab. Add arsenate of lead, 2 pounds to 50 gallons, for bud- 

 moth and case-bearers. 



9 



