32 



CROP PEST COMMISSION OF 



This mixture, as well as the lime-sulphur preparation, 

 should be strained after being diluted and before being placed 

 in the spray tank. A suitable strainer for this purpose is 

 shown in Figure 14 and can be made from an ordinary wooden 

 bucket by screwing a piece of one or two-inch gas pipe into 

 the bottom and inserting a piece of wire cloth (having about 18 

 or 20 meshes to the inch) in the bucket itself. 



WHEN TO SPRAY. 



For full and satisfactory 

 control of the San Jose scale 

 winter spraying alone must be 

 depended upon. Although ref- 

 erence is made upon a subse- 

 quent page to "summer treat- 

 ment," the latter does not re- 

 sult in more than a checking of 

 the rate of increase and cannot 

 in any sense be considered a rem- 

 edy. Spraying of orchards for 

 this pest must be done in win- 



f JG . 14. A serviceable home- ter, and spraying with the lime- 



sulphur mixture must not be 

 one until the trees have become 



pipe in the bottom. (Prom a photo thnrrmcrhlv Horrnanr in thp fall 

 by W. E. Britton, Conn. Exp. Sta- .mgmy ( 



tlon -) or early winter. In the case of 



orchards lightly infested one spraying, if carefully done, will 

 keep the scale in check until the following winter, but where the 

 pest has obtained a good foothold and some of the trees are "in- 

 crusted," two sprayings should be given to get the insect fully 

 in subjection and to prevent serious damage to the trees during 

 the ensuing year. When two sprayings are given, the first 

 should be as soon as possible after all the leaves have fallen from 

 the trees and the sap has ceased circulating. The period best 

 adapted for this work in Louisiana is during December. The 

 second spraying should be given late in January or early in 

 ^February, the object being to put on this application as late as 



bucket 10 and 



