the Attacks of Insects and Fiiniji. 
255 
The action of sulphur is materially influenced by conditions 
of weather. It is more powerful in heat, when volatilisation 
takes place, and appears to be inoperative in dull cold seasons.' 
It should always be put on the plants in sunny still weather, if 
possible, and as soon as they have got well over the poles. 
Another sulphuring should be given in about three weeks, and 
a third later on, especially if there are any traces of mildew upon 
Y'-ii. 26.— Uop suliiliunuor. 
the " burr.'" Should the fungus attack the cones when deve- 
loping or when they are out, sulphur must be used again, though, 
if possible, this should be avoided, as brewers object sometimes to 
hops that have been sulphured while fully out. 
The quantity of sulphur varies from 40 to GO lb. per acre, 
according to its lightness and quality.^ In France very small 
' For delails. as to sulphur and its effect on hop mildew, see Mould or 
Mildew on Hop Plants, by Charles Whitehead. Clowes and Sons, Stamford 
Street, London. 
- The price of sulphur is from 11?. to IM. per ton. 
