13 



Trees should not be sprayed with resin washes more than 

 once annually as the wash eloses up the pores in the bark and 

 makes the tree unliealthy. 



RESIN WASH, No. 2.— The following modification of the 

 above resin wash is advised by Hume for summer use on citrus 



trees. 



English Metric. 



''Resin • . . 20 lbs. or 9 kilos. 



Caustic soda (98 0|0) 5 lbs. or 2.3 kilos. 



Fish oil 3 pints or 1.4 litres. 



Water to make 150 gals. or 570 litres. 



Prepare as directed in the preceding formula." 



SODA SULFUR SOLUTION.— The following formula is 

 also taken from Hume and is to be used againt purple mite, red 

 spider and rust mite. It is likewise a fair fungicide for 

 mildews. 



Sulfur 30 lbs. or 13.6 kilos. 



Caustic soda (98 0|0) 20 lbs. or 9 kilos. 



Water 3 gals. or 11.5 litres. 



To make the stock solution, place the sulfur in a half barrel 

 and reduce it to a thick paste with the three gallons or 11.5 litres. 

 or water. Then add the caustic soda and mix it well with the 

 sulfur paste. As the mixture becomes warm gradually add wat 

 er to prevent burning. Stir thoroughly, adding water until 20 

 gals. or 76 litres of the solution are obtained. Drain off into a 

 keg and use as desired". 



"For use take one or two quarts or 2 litres of this stock 

 solution to 50 gals. or 190 litres, for rust mite, and double this 

 strength for six-spotted mite." 



SULFUR AND FLOUR PASTE.— A mixture made from 

 sulfur , flour and water is used largely in Cuba upon citrus trees 



