LESS IMPORTANT DISEASES. 37 



being separate species, we shall retain for the present the two names 

 as already used. 



Richards 59 reports infection experiments with the Exobasidium 

 producing spots on leaves of Andromeda and the one forming large 

 inflated galls on the same host. He succeeded in producing the leaf- 

 spot form by using spores from the gall-producing form which was 

 named Exobasidium andromedae by' Peck. 03 This suggests the pos- 

 sibility of the interchange of other forms, and it is hoped that further 

 work may be done in this direction. 



Exobasidium oxycocci occurs in greatest abundance in May and 

 June. It has also been collected as late as September, when occasional 

 fresh specimens were found at Brewster and Pleasant Lake, Mass. 



TREATMENT. 



Little, if anything, so far as can be learned, has been attempted 

 in the way of controlling diseases caused by Exobasidii, as they 

 have rarely assumed economic importance. As definite knowledge in 

 regard to time and manner of infection is lacking, it is difficult to 

 recommend treatment. It is possible that spraying with Bordeaux 

 mixture may be beneficial, and experiments in this direction are 

 planned for the coming season, when it is also hoped to secure more 

 knowledge of this fungus. 



LESS IMPORTANT DISEASES. 

 FUNGI ATTACKING THE FRUIT. 



8ynchytrium vaccinii Thomas. This fungus was first described 

 from New Jersey specimens by Dr. Fr. Thomas, 5 ' 5 of Germany, in 

 March, 1889, under the above name. When first discovered it threat- 

 ened to do serious injury to the New Jersey cranberry bogs. It was 

 first found in 1886 upon a bog near Browns Mills, N. J. Doctor 

 Halsted, 10 of the New Jersey Experiment Station, gave an account 

 of the disease in 1880, and called the parasite the cranberry gall 

 fungus. The fungus attacks the leaA r es and young stems as well as 

 the flowers and fruit, forming great numbers of small, reddish, 

 gall-like swellings upon their surface (PL IV, figs. 15 and 16). Sec- 

 tions of these galls show the fructification of the fungus embedded 

 near their center (PL IV, fig. 17). The fungus consists of a scanty 

 vegetative mycelium producing globose sporangia, which finally 

 develop a mass of swarm spores within. The sporangia rupture and 

 the spores are then set free. These swarm spores are motile and well 

 adapted to distribution through the water. At the time this fungus 

 was found at the place mentioned a considerable portion of the 

 plants on one side of the cranberry meadow was affected and the 

 no 



