PHYLLACTINIA 



153 



The fungus is common on many wild plants, as meadow- 

 sweet, yarrow, willow-herbs, geraniums, agrimony, etc. ; all 

 such should be kept away from the vicinity of hop fields. 



Sulphur in some form has proved to be the best fungi- 

 cide. Flowers-of-sulphur should be dredged on the plants 

 during sunshine, as then fumes are given off. Sulphide of 



FIG. 38. Phyllactinia suffulta. i, hazel leaf with patches of 

 mildew ; 2, perithecia, a, appendages ; b, mycelium ; c, ascus 

 escaping from a perithecium e ; 3, asci containing spores. Fig. i 

 somewhat reduced ; remainder highly mag. 



potassium in solution should also answer, if spraying is 

 commenced sufficiently early in the season. 



PHYLLACTINIA (LEV.). 



Perithecia depressed, appendages straight, sharp pointed, 

 with a bulbous base ; asci many, rarely 3-4 spored. 



