INJURIOUS AND BENEFICIAL INSECTS 



FRUIT TREE INSECTS 



1 Apple tree tent-caterpillar (Clisiocampa americana). 

 The conspicuous web tents found in the forks of apple and cherry 

 trees in May contain hairy, bluish black caterpil- 

 lars marked with yellowish and with a white 

 stripe along the back. The cocoons are spun the 

 last of May, the light brown moths, with oblique 

 white stripes across the fore wings, flying in June. 

 The eggs, in belts incircling the smaller twigs, 

 are covered with a browuy glistening protective 

 substance and remain unhatched till spring. 



Treatment: remove and destroy the eggs or 

 crush the young in their nests. Spray the foliage "^^ c^^v 



of infested trees with poison in early spring. 



2 Codling-moth (Carpocapsa pomon- 

 ella). Familiar as the worm boring in apples 

 near the core. The winter is passed by the cater- 

 pillar in small cavities under sheltering bark or 



in crevices. 



Fig. 1 Egg belt of 

 apple tree tent-cat- 



The moths ap- 

 pear shortly ^rplHar, enlarged ^ 



after the petals fall. There 

 are usually two broods a year 

 in New York state. 



Treatment: band trees and 



kill 



worms collecting under 



the bands, destroy wormy 

 apples, spray with poison 

 shortly after the petals have 

 fallen, and while the calyx 

 lobes are still open. Prevent 

 escape of the moths in the 



spring from fruit cellars or storehouses. 



3 Palmer worm ( Y p s o 1 o p h u s p o m e t e 1 1 u s ). Small 



wriggling, yellowish green caterpillars, having a dark stripe on 



Fig. 2 Codling-moth: a burrow of larva; & point 

 of entrance of larva; d pupa; e full-grown larva; 

 /adult moth at rest; (j same with wings spread; 

 h head of full-grown larva (after Riley) 



