52 



was invariably superior in appearance to that sprayed with 

 Bordeaux. 



Experiments for the control of apple scab on AVinesap 

 were conducted in Virginia during 1909 with the following 

 results : On the plots sprayed with lime-sulfur solution less 

 than one per cent, of the fruit was affected with scab ; on 

 that sprayed with Bordeaux mixture about two per cent, 

 of the fruit was affected; and on the check or unsprayed 

 plot, thirty per cent, of the fruit was scabby. 



During the same year similar experiments were con- 

 ducted in IMichigan with like results. The scab was held 

 down to four per cent, of the crop by the lime-sulfur solu- 

 tion and to three and one half per cent, by Bordeaux mix- 

 ture, while eighty per cent, of the imsprayed fruit of the 

 same variety (Wagener) was affected. 



In both the Virginia and the Michigan experiments the 

 coiiiDiercial lime-sulfur solution at a strength of 2 to 50 

 slightly scorched the leaves particularly on the terminal 

 shoots, but this did not prove to be serious and at the end 

 of the season the foliage was in good condition, the apple 

 leaf-spot having been controlled and the cedar rust held in 

 check. It was found also that arsenate of lead used with, 

 the lime-sulfur solution did not result in injury to fruit or 

 foliage and that it controlled codling moth as thoroughly 

 as when combined with Bordeaux mixture. A full account 

 of these experiments was published in Circular No. 54 of the 

 Bureau of Plant Industry. 



Experiments of 1910 



During the past season further experiments with the 

 lime-sulfur sprays were conducted near Waynesboro, Va., 

 in the orchards of J. G. Hunt, W. Plumb, and W. F. Gilker- 

 son. A part of the work was conducted as a demonstration 

 in cooperation with the Bureau of Entomology. From 75 to 

 to 200 trees each of Winesap, York Imperial, and Ben Davis, 

 were sprayed and ten trees of each variety left unsprayed 

 as a check. The principal part of the experiment consisted 

 of four plots treated as follows : 



Plot 1. Commercial lime-sulfur solution, 1 1-2 to 50, 

 2 lbs. arsenate of lead. 



Plot 2. Home-made lime-sulfur solution at the rate of 



