Insect and Disease Control 279 



spraying program arranged for the major diseases. At the 

 same time, the grower should always be on the watch for an 

 outbreak of some new or little-known disease, and in case 

 he discovers anything that arouses his suspicions, he should 

 take steps to ascertain whether or not it is a serious peach 

 menace. 



INSECTICIDES, FUNGICIDES, SPRAYING 



The following paragraphs are presented for the purpose of 

 aiding the grower as far as possible in making and using the 

 various preparations which have been found the most 

 effective in controlling the more common peach insects and 

 diseases. 



The grower should keep clearly in mind the important 

 fact that successful spraying of fruit-trees is absolutely 

 dependent on three factors : (1) The proper spraying 

 material ; (2) timely applications ; (3) and thoroughness 

 of application. To fail in any one of these particulars is 

 equivalent to failing in all of them. 



Insecticides 



Concentrated lime-sulfur mixture. 



This preparation kills by contact with the insect. It is 

 used when the trees are dormant and principally for scale 

 insects. Reference to its use as a fungicide occurs under 

 "leaf-curl" on page 259. It has been tried also in a much 

 diluted form as a summer spray for the control of brown- 

 rot and scab, but experience has shown that it is unsatis- 

 factory, since in a strength sufficient to control these diseases 

 there is great danger of injury to the foliage. 



