66 INSECTS OF ECONO^IIC LMPORTANCE 



seem to be as injurious to peaches as when used 

 alone. The first appHcation should be made about 

 the time the calyces or shucks are falling and the 

 second two or three weeks later. It is doubtful if 

 a third application of poison is advisable. 



The Sax Jose scale — Very injurious to peach 

 trees ; discussed under pear pests. 



OTHER INSECTS INJURIOUS TO THE PEACH 



Lesser peach-tree borer (Synanthedon picfipes). 

 White peach scale {Aulacaspis pentagona). 

 Fruit-tree leaf-roller {Archips argyrospila). 

 Apple-tree tent-caterpillar {Malacosoma amcri- 

 cana). 



Peach saw-fly (Pamphilius pcrsicns). 



QUINCE PESTS 



The quince curculio ^^ (CoiiofracJicIus crafcrgi) 

 Order — Coleoptera 



This insect is a native one and its natural food 

 is the hawthorn ; it also attacks pears and is widely 

 distributed throughout the eastern, central,, and ex- 

 treme western portions of the United States. 



The winter is passed in the grub stage in small 

 cells 2 or 3 inches below the surface of the earth; 

 the grubs change to pup?e in the spring; the beetles 

 appear from last week in ]\Iay in some seasons to 

 last week in July in others; the beetles feed on 

 young fruits for some days and then deposit their 

 eggs in the fruit; the larvae feed on the tissues of 

 the quinces and when full-grown emerge through 

 a hole and drop to the ground. 



Control — ''^' Spray first as soon as beetles be- 



54 Slingerland — Cornell Univ. Expt. Stat., Bull. 148. 



5'^ Strickland and Achilles— N. Y. State Dept. Agr., Bull. 116. 



