PBOFITS FROM SPRAYING 



51 



ing quality of many kinds of produce is increased by 

 spraying. 



Protection of the plant. — In many cases the benefits 

 are apparent the second and succeeding rather than the 



Fig. 16. — Potato field showing benefits of spraying. Portion at left received 

 Bordeaux mixture and Paris green ; portion at right received Paris green only. 

 Original. 



first year, since spraying protects the foUage, the func- 

 tion of which is to accumulate nourishment for the crop 

 of the following year. 



Spraying should be regarded as insurance. It pro- 

 tects the crop against the devastation of disease, yet in 

 most cases it differs from insurance in the fact that it 



