33^ 



of the plant parasite; by poisoning the leaf-eating insect, or killing the 

 sucking insect with^something which destroys its body, in the case of 

 insects. 



Cornell spray calendars have stated that spraying is a type of 

 orchard insurance. Growers ask: Shall I spray when I have little or 

 no fruit? The answer is: Yes, by all means. Insure for your trees 

 a crop of healthy leaves, so that wood may be grown and fruit buds 

 developed. This is the best way to secure a crop the following year. 

 The man who sprays year in and year out insures his crop against standard 



enemies, and to a large de- 

 gree against epidemics, and 

 tends to lessen the numbers 

 of his staple insect foes. 



How to Spray. 



First, know the enemy. 

 Study the crops you are 

 growing, and you will learn 

 to recognize the parasites 

 that attack them. Learn 

 the feeding habits of these 

 and the principal facts of 

 their life-history. Then 

 study the remedy, under- 



Fig. 145. Slugs of the potato beetle. Chewing insects, stand its principles— how 



it acts. Next, secure the 

 appliance which seems best adapted to your needs. Prepare your spray 

 mixture carefully, and apply it thoroughly. Next to timeliness, thor- 

 oughness is of prime importance. Hundreds of fruit-growers and farmers 

 "waste time, energy and material by indiscriminate aild hasty squirting 

 of spray mixtures over fruit trees and farm crops. Remember that the 

 principle is protection, and that the plant is protected only when it 

 is completely covered. Some insects must be hit to be killed. Do not 

 spray, therefore, unless you do the work thoroughly for you will disgust 

 yourself and destroy your neighbor's faith in the treatment. Spraying 

 is not pleasant work but fruit-growers and farmers must accept the 

 situation and make the best of it. 



In the succeeding pages of this bulletin, the subjects of formulas, 

 machinery, insects and diseases are treated. Each division has been 



