CALCIUM ARSENITE. 159 



Fusicladium dentriticum, Fuckel (apple scab) ; Carpocapsa pomo- 

 nella (pyralis of the apple, codlin moth). — The efficient bouillie con- 

 tains London purple or arsenite of lime 0-050 per cent, copper 

 carbonate 0*45 per cent, ammonia 0*5 per cent. After six sprayings 

 made on 25 March, 1, 15, and 20 May, 26 June, and 14 July, Halstedt 

 obtained 47'6 per cent of sound apples and 3-46 per cent of wormy 

 apples, against 30 per cent of sound apples and 6-7 per cent of wormy 

 apples. The same result was got by a mixture of bouillie bordelaise and 

 London purple. Carrol by three sprayings on apple-trees, the first 

 soon after flowering, the two others at three weeks' interval, obtained 

 apples quite free from worms, whilst the check samples contained 60 

 per cent. The first spraying and the second were done with a bouillie 

 containing 0'06 per cent of London purple and 1-2 per cent of lime, 

 the third with a bouillie containing O'l per cent of purple and 2 per 

 cent lime. 



