222 



TREES AS GOOD CITIZENS 



Tulip Tree Soft Scale 



Habits This sap-sucking scale insect 



and sometimes causes serious dam- 



Damage, age to the branches of a tree. 

 The young spend the winter 

 on the bark, and the following spring and 

 summer they use the bark as their feeding 

 and breeding ground. They are gray or 

 brown, about y$ inch long and almost as 

 wide, and prominently raised. In severe 

 attacks they encrust the underside of 

 branches so thickly as to give them a 

 sickly, blackened appearance, and the 

 death of the branches may result. 



Remedy. Winter spraying with crude 

 petroleum is effectual. Mis- 

 cible-oil solution, applied in winter, also 

 has its advocates. On small trees whale- 

 oil soap in a proportion of one pound to 

 four gallons of water, makes a satisfac- 

 tory spray, if applied just after the young 

 are hatched, early in September. 



WALNUT 



Walnut Caterpillar 



(See description and remedies under Hickory) 



