CANKERWORM 



269 



the poison will reach the small calyx before the worm enters 

 the fruit. As the time of hatching is somewhat prolonged, 

 it is advisable to spray again in ten days or two weeks. 

 In many sections of the country there are two or more 

 broods of the codling moth in one summer, and under 

 these conditions it is necessary to repeat the spraying at 

 the times of the succeeding broods, the exact times varying 

 with the season and locality. The worms of the last 

 brood are the ones seen when the winter apples are har- 

 vested. Many of 

 them leave the fruit 

 while in storage and 

 form their cocoons on 

 the sides of crates, 

 barrels, or other 

 storage receptacles. 



Cankerworm. 

 The cankerworm 

 feeds upon the foliage 

 of apple trees, often 

 entirely stripping 

 them of leaves. The 

 worms are brownish 

 and about an inch 

 long when fully 

 grown. They lower Fig> I44> ~~ Webs of a tent cater P mar on an a PP le tree - 

 themselves to the ground by means of a fine thread. 



Cankerworms are controlled by spraying with an arsen- 

 ical poison applied as soon as the worms are seen. Ar- 

 senate of lead applied as soon as the leaves are formed in 

 the spring, usually controls them. Where the fall canker- 

 worm is troublesome, use the same spray in the fall. 



