APPLE INSECTS — BUDS AND FOLIAGE 



123 



In orchards where arsenical spraying is practiced, as for the 

 codhn-moth, the young caterpillars are killed before doing 

 much injury. On small trees they may be jarred off on to 

 sheets or curculio-catchers and destroyed. When molting, and 

 during the heat of the day, the caterpillars collect in large 

 masses on the trunk and branches, where they may be readily 

 brushed down and crushed. After defoliating a piece of wood- 

 land the caterpillars frequently migrate to near-by orchards 

 in countless numbers. Banding the trunks with tree tangle foot 

 or loose cotton bands will prevent the ascent of these wandering 

 larviB. The egg-rings are easily seen while pruning, especially 

 on small trees. They should be removed and burned, for if 

 thro^vn on the ground the young larvae may be able to crawl to 

 the tree and so survive. 



References 

 N. Y. (Geneva) Agr. Exp. Sta. Bull. 159. 1899. 



The Yellow-necked Apple Caterpillar 

 Datana ministra Drury 



In the Northern states and Canaila apple branches are often 

 defoliated in late summer ])y colonies of l)la('k and yellow striped 

 caterpillars about two inches 

 in length when mature ; the 

 head is black and the next 

 segment is yellow, whence the 

 common name. While a few 

 colonies are found evc^ry year 

 they are only occasionally 

 abundant enough to do serious 

 damage. Besides the apple, ^^^ ,^^ _ ^^^^^ ^^ .^e yellow-necked 



this caterpillar also attacks apple caterpillar. Nat. size. 



pear, cherry and quince, as well as many forest trees. 



