PEAR SCAB 



305 



Preventive Means. — Similar to those recommended 

 under ' Apple Scab.' 



Goethe, Gartenflora, 15 Mai 1887. 



Fig. 81. — Fusicladiutn pirinum. i, fungus on the 

 upper side of a pear leaf; 2, fungus on a pear; 3, 

 conidia, a, borne on the tips of conidiophores, b, X300. 



SWEET-CHESTNUT DISEASE 



{Acrospeira mirabilis, Berk.) 



The ripe fruit of the sweet-chestnut {Castanea vesca, 

 Gaertn.) is sometimes filled with a dense blackish-olive 

 felt belonging to the fungus named above. Nothing as to 

 the life-history of the parasite is known. The disease 



U 



