THE HOP PLANT. 51 



Various palliative measures have been proposed, but the 

 only one that has proved efficacious is that of dusting the 

 plant over with about 60 lb. of flowers of sulphur per acre, 

 either with a kind of bellows or by means of a special 

 apparatus (sulphuriser). Good results are also said to be 

 obtained by sprinkling the plants over thoroughly with a J 

 per cent, solution of bicarbonate of soda. To annihilate 

 the hibernating germs it is advisable to burn the bine and 

 leaves of all infected plants as soon as the crop is gathered ; 

 the hop poles should also be disinfected with sulphur, for 

 which purpose Strebel advises their being placed in a wooden 

 chest some 33 feet in length, and exposed for six hours 

 to the fumes of burning sulphur. 



A hop-grower of some fifty-three years' standing in the 

 Auscha district informs the author that in 1855, when mould 

 was excessively prevalent, he had the bine entirely stripped 

 of leaves, though it had already attained a good height. 

 The roots were then dressed with a mixture of liquid man- 

 ure, pigeon and fowls' dung, the effect of which was to 

 induce rapid growth, and finally produced a crop of 4 cwt., 

 the area of the garden being about 1 hectare (2-4 acres). 

 In other gardens where this plan was not adopted the crop 

 was a total failure. 



Other fungi of less importance attacking the hop plant 

 are, according to Sorauer, Frank, and Fruwirth : Leptospharia 

 dumetorum Niessl., on withered stocks ; Phyllosticta Humuli Sacc, 

 on faded leaves ; Phragmidum Humuli Barth,^ or red rust, 

 appearing as ragged red patches particularly on young 

 leaves ; Septoria Humuli West, and Sphczrella erysiphina Cooke, 

 the latter observed only in England, and forming small 

 light brown patches with blackish edges ; Synchytrium aureum 

 Schroet., occurring as small pearly warts, containing a golden 



1 MUtheilvmgen des deutschen Hopfenbawvereines, 1895, No. 7. 



