PROFITS FROM SPRAYING 



53 



Table ' showing Results of Volunteer Experiments, 

 1904-1908 



Average gain for 5 years (188 experiments) 50i bushels per acre. 



Thoroughness in spraying. — Unless thoroughly and 

 carefully done the results from spraying may be disap- 

 pointing. Spraying is an operation that requires careful 

 heed to directions, and painstaking, patient execution. 

 Poorly done, the benefits may be nil or damage may result 

 from the chemicals applied. Failures to get good results 

 from spraying, in the large majority of cases, have been due 

 to lack of thoroughness on the part of the operator. By 

 thoroughness it is meant that every part of the plant sur- 

 face is to be coated with a film of the spraying mixture. 

 Failure to do this leaves some points vulnerable. On the 

 other hand too large an application of fungicide is unde- 

 sirable, often resulting in injury and death of the green 

 part, and always leading to waste of fungicide. When 

 the fungicide accumulates in drops and drips or runs off, 

 too much is present. To apply so little that none drips, 



' Stewart, F. C, and others, N. Y. (Geneva) Agr. Exp. .Sta. Bui. 311. 



