INSECTS INJURIOUS TO ORCHARD TREES 

 AND FRUITS 



APPLE PESTS 



The codling moth ^ (Car.pocapsa pomonella) 

 Order — Lepidoptera. Manual p. 241 



One of the oldest and most important pests on 

 apples; estimated that it causes a yearly loss of 

 $12,000,000 in the United States with an added 

 $4,000,000 for cost of spraying trees to control it. 



Eggs laid on leaves and fruit about two weeks 

 after petals fall; caterpillars emerge in about one 

 week and 60 to 80% enter the young fruit through 

 the calyx end; they live in the apple from 25 to 30 

 days, or longer in many instances, and when full- 

 grown leave the fruit through a hole made in the 

 side of the apple ; they then crawl to a crevice in the 

 bark of the large limbs or trunks or find a nook 

 elsewhere and spin a cocoon ; here, some of the lar- 

 vae change to pupae and issue as moths the latter 

 part of July to form a partial second brood in New 

 York State; a large part of the larvae, however, re- 

 main under the bark until the following spring and 

 then change to pupae from which, in about twenty 

 days, the adult moths issue. All of the larvae of 

 the second generation remain in cocoons under the 

 bark until spring. 



Control — Spray at once after three-fourths of 

 the petals have fallen, with 150 pounds pressure, 

 using 2j4 pounds of paste arsenate of lead to 50 



1 Slingerland— Cornell Univ. Expt. Stat., Bull. 142. 

 Qnaintance— U. S. Dept. Agr., Yearbook 1907, p. 435. 



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