PAGE 



Life history and appearance 90 



Food plants 97 



Means of distribution : 



By l)irds, squirrels, insects, wind, etc 98 



On nursery stock 99 



Means of control : 



Natural checks 99 



Preventive measures 100 



Artificial means of control 101 



The lime-sulphur wash 102 



Directions for making 103 



Commercial solutions 104 



The miscible oils 104 



Apparatus and equipment 104 



Miscellaneous directions 105 



