314 YARD AND GARDEN 



Canker Worm — This insect feeds on the 

 leaves, devouring all save the skeleton and mid- 

 rib and giving to the tree attacked the appear- 

 ance of having suffered from exposure to fire. 

 It is a dull-colored measuring worm, and drops 

 from the tree by a thread web. Bands of tar 

 or sticky paper may be used with good results, 

 provided the bands are employed from the mid- 

 dle of November to the latter part of April. 

 Spraying with Paris green or arsenate of lead 

 is also effective. 



Catalpa SpJiinx — The so-called Catalpa 

 Sphinx is difficult to control, owing to the char- 

 acter of the plants it feeds on. Neither spray- 

 ing nor hand picking is practical, and the only 

 method of control seems to be thorough cul- 

 tivation under the trees in both late fall and 

 early spring. 



Chrysanthemum Lice — See Aphis. 



Codlin Moth — It is the presence of this insect 

 that makes apple growing difficult in this coun- 

 try. The insect hatches from the cocoons in 

 the late spring and at once lays its eggs on 

 the young apples, mostly at the flower end. 

 The trees should be sprayed just after the 

 blossoms fall so as to fill the calyx with the 

 poison, as many of the young larvai enter the 



