Spraying Shade Trees, Ornamental 

 Plants and Flowers 



SHADE TREES 



INSECT ENEMIES OF THE FOLIAGE 



The Woolly Maple Bark-louse is often one of 

 the most destructive shade-tree pests. Its presence is 

 shown in spring and early summer by the occur- 

 rence upon the twigs of a brown, circular, leathery 

 scale about }i inch in diameter, beneath which is a 

 peculiar white, fluffy, cottony mass. In the spring 

 there may be found, in each of these masses, great 

 numbers (from 700 to 1000) of small, white, spherical 

 eggs. Early in summer these eggs hatch into young 

 lice, which scatter over the trees, wandering about on 

 the twigs and leaves for a few days, and, finally, fixing 

 themselves upon the lower leaf surface, insert their tinv 

 beaks and suck out the sap. They remain in this posi- 

 tion several weeks, when a few of them become fully 

 developed winged males. These mate with the remain- 

 der, which are females^ and soon die. But the females 

 remain upon the leaves until nearly time for the latter 

 to fall in autumn, when they desert themi and migrate 

 to the twigs, attaching themselves by inserting their 

 beaks into the bark. Here they remain until spring, 

 the eggs gradually developing. 



Remedy — Spray infested trees in June, when the 

 lice have just hatched, w^ith kerowater or kerosene 

 emulsion. 



