62 



FRUir INSECTS 



wings of these Tortricid moths are white with brown mottlings 

 and shades, and have an expanse of about J of an inch. 



This leaf -sewer rarely does serious injury, but in a few instances 

 it has appeared in alarming numbers in orchards in western 

 New York and in Ontario, Canada. 



Well cultivated orchards rarely suffer from this pest, as most 

 of the hibernating caterpillars are buried with the fallen leaves. 

 The effective method of raking up and burning the leaves in 

 autumn would be practicable in some cases. A thorough 

 application of a poison spray in early June will also kill many of 

 the caterpillars then just beginning work on the foliage. 



The Fruit-tree Leaf-roller 

 Ar chips argyrospila Walker 



Recorded as common throughout practically the whole of the 

 United States, this insect is one of the most destructive of the 



leaf-rollers infesting fruit trees. It 

 has been especially injurious in the 

 orchards of New York, Missouri and 

 Colorado, attacking apple, pear, 

 cherry, plum, apricot, quince, rose, 

 currant, raspberry and gooseberry, 

 besides about a dozen different kinds 

 of forest trees ; curiously enough 

 peaches seem to be exempt from at- 

 tack. It is thus a very general feeder, 

 and it sometimes strips fruit trees 

 and ruins many of the young fruits. 



The eggs are laid in June on the 

 bark of the twigs in small flat, light 

 l)rovvn or grayish ])atches, each patch 

 containing about 150 eggs and covered with an impervious 

 gummy substance (Fig. 64). The winter is passed in the egg 



Fig. 64. — Egg-mass of th( 

 fruit-tree leaf-roller on ar 

 apple twig, enlarged. Ilerricl 

 photo. 



