256 Practical Orcharding On Rough Lands. 



Insects. — Now we come to that other class 

 of troubles, insects. There are a great many 

 which attack our plants and fruits against 

 which we must wage war To list or classify 

 these would be tedious, as well as useless for 

 the average practical grower, so we shall divide 

 them into two gerat classes, making this classifi- 

 cation according to the way in which they take 

 their food. First, the Sucking Insects, — those 

 which take their food by means of puncturing 

 the bark or outer portions of a plant and draw- 

 ing on its sap, — such as San Jose and other 

 scale insects; Aphis or plant lice which we find 

 upon the leaves, stems and sometimes the roots 

 of our trees. 



Spraying for Scale— If oil is to be used to 

 destroy the scale it should be applied while the 

 trees are dormant The weather conditions 

 should be considered also; if possible the ap- 

 plication of oil should be made on airy, sunny 

 days, when the evaporation will be as great or 

 rapid as possible, as this will very much lessen 

 the danger of injury to the plants. We also 

 have the Lime-Sulphur Solutions which are in- 

 secticides as well as fungicides, the home boiled 

 known as the California Wash, and the chemic- 

 ally prepared lime-sulphur. These with the 

 oil are the chief materials used in eradicating 



