AN APPLE ROT CAUSED BY GLIOCLADIUM VIRIDE 



^ Introduction 



The fungus upon which this paper is based was found on 

 several plates which were made while isolating fungi from diseased 

 apples. When inoculated on healthy fruit it produced a rot. 



The Fungus 



The mycelium oi this fungus is hyaline, creeping, septate, 

 branching, and varies from 1.8 to 3.6 microns in width (Fig. 1). 



The conidiophores are formed as in Penicillium. They 

 grow erect from the internal mycelium, branching once to many times 

 (Figs. 7, 8, 9). They are hyaline, septate, and can only be dif- 

 ferentiated from the aerial mycelium by the profuse branching. 

 These branches become brushlike as in Penicillium (Fig. 13). Ma- 

 truchot^ describes the branches of the conidiophores as budding 

 just below a septa and growing up parallel to the main axis (Fig. 

 15) . 



The conidia are borne in great numbers on the ends of the 

 conidiophores. According to Uatruchot they are borne in chains, 

 but remain so only for a very short time. Examination of all 

 stages of this fungus has not shown chains of spores, but rather 

 a new spore borne from the same point as the old one and pushing 

 the older one aside (Fig. 6). Almost immediately the spores pro- 

 duce externally a gelatinous substance which glues thera tightly 

 together in masses. Matruchot describes the sticky coating as a 

 white milky substance. The spores upon one conidiophore may be 



attached to those of a whole c luster^f o rming_a_lar ge^^ 



1. Matruchot, L.; Bui. Soc. Myc. 1893, p. 246. 



