NINETEENTH ANNUAL MEETING. 165 



tion because it not only controlled the leaf-spot, but did not 

 injure the foliage and apparently had a stimulating effect on 

 the trees. All the lime-sulphur mixtures, as well as the Bor- 

 deaux, controlled the sooty fungus and an undetermined 

 "fruit-spot" which was common the past season in Virginia. 



Considerable scab developed on the unsprayed Wine- 

 saps in the Fishersville orchard, so that we had a partial test 

 of the efficacy of the sprays on this disease. Only one 

 strength (2 to 50) of the commercial lime-sulphur was used 

 on this variety. The crop from four trees in each of the 

 more important plots was picked and sorted and the scab re- 

 sults are shown in the following table. 



Per Cent 

 Plot Spray Mixtures Used. Scabby 



2 Commercial lime-sulphur, 2 to 50, and Paris green 0.63 



3 Commercial lime-sulphur, 2 to 50, and Arsenate of lead. 0.51 



4 Self-boiled lime-sulphur, 10-10-50, and Arsenate of lead. . 3.75 

 6 Bordeaux mixture 3-3-50, and Arsenate of lead 2.15 



8 Check-Unsprayed 30.27 



It will be seen from this table that the scab was held 

 down to less than one per cent of the crop by the commercial 

 lime-sulphur, to 3^4% by self-boiled lime-sulphur and to 

 about 2% by Bordeaux mixture, and that 30% of the un- 

 sprayed fruit was affected with scab. The disease was well 

 controlled by all the mixtures, but it will be noted that it was 

 not particularly bad' on the unsprayed trees, so that the test 

 could not be considered a severe one. None of the Winesaps 

 were sprayed with the weaker preparations, nor with the 

 home-boiled lime-sulphur. 



In this experiment the comparative effect of the differ- 

 ent mixtures on the codling moth was determined and it was 

 found that the combination of lime-sulphur and arsenate of 

 lead controlled this insect fully as well as Bordeaux mixture 

 and arsenate of lead. It seems, therefore, that the poisonous 

 action of this arsenical is not reduced by combining it with 

 the lime-sulphur preparation. 



