DIPPING AND FUMIGATION OF NURSERY STOCK 



25 



In order to verify the above results, the following trees were treated 

 in 1917 with lime-sulphur at a strength of 1-7. . 



TABLE 14. APPLES TREATED IN 1917 



In 1920 besides using commercial lime-sulphur in which to dip the 

 trees, soluable sulphur, dry lime-sulphur and barium tetrichloride sulphide 

 were used. The last three named compounds have been placed on the 

 market and are sold as scale remedies. The following table shows the results 

 obtained in 1920 with these different materials on scaly apple trees. 



TABLE 15. APPLES TREATED IN 1920 



Of the above materials used dry lime-sulphur used at the rate of 12 

 pounds to 50 gallons of water gave the best results. 



