100 



SPRAYING CROPS 



concea.ea when not eating. As they grow larger they 

 draw about the openings of their abodes many par- 

 tially eaten leaves, so that by autumn there is quite a 

 bunch surrounding each case (b). At the approach, 

 of cold weather the cases are attached to twigs by 

 silken threads, and thus the winter is passed. As soon 

 as the leaves appear the larvae attack them, frequently 

 eating out the flower buds as well. They feed until 

 June, when they pupate within the cases. A fortnight 

 later the moths emerge. 



The Apple Leaf-skeletonizer .s a brownish or 

 greenish larva, which spins a web upon the upper sur- 

 face of the leaf, and eats the parenchyma, giving the 

 foliage a scorched appearance. The larvae hatch from 

 eggs laid late in spring by a little moth, and as the}' 

 grow older they spin a slight protective silken web on 

 the upper surface of the leaf, beneath which. they feed. 

 When full grown (a) they vary from an olive or pale 

 green color to brown, are about half an inch long, and 

 have four black shining tubercles on the back, just 

 behind the head. About midsummer they pupate in 



Lesser Leaf=roller 



a, larv^a; 5, pupa; c, moth; d, rolled leaf 

 (After Riley) 



