LESS IMPORTANT DISEASES. 37 



being separate speoies, -we shall retain for tln^ present the two names 

 as already used. 



Richards^" reports infection experiments with the Exobasidium 

 j^roducint; spots on leaves of Andromeda and the one formin<; lar<>^e 

 inflated trails on the same host. He succeeded in producin*; the leaf- 

 &:pot form by using spores from the gall-})roducing form which was 

 named Ewobasulium andromedae by Peck.""' 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. 



TKEAT.MKNT. 



Little, if anything, so far as can be learned, has been attemi)ted 

 in the way of controlling diseases caused by Exol)asidii. as they 

 have rarely assumed economic importance. As definite knowledge in 

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

 I'ecommend treatment. It is possible that spraying with Bordeaux 

 mixture may be beneficial, and experiments in this direc-tion are 

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

 knowledge of this fungus. 



LESS IMPORTANT DISEASES. 

 FUNGI ATTACKING THE FKl rr. 



Synvlitjtriuin I'dcciiiil Thomas. — This fungus was first described 

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

 ]\Iarch, 1881), under the above name. When first discovered it threat- 

 ened to do serious injury to the Xew Jersey cranberry bogs. It Avas 

 first found in 1880 upon a bog near Browns Mills, N. J. Doctor 

 Halsted,^" of the Xew Jersey Experiment Station, gave an account 

 of the disease in 1881), and called the parasite the cranberry gall 

 fungus. The fungus attacks the leaves and young stems as well as 

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

 gall-like swellings upon their surface (PI. IV, figs. 1.") and 16). Sec- 

 tions of these galls show the fructification of the fungus embedded 

 near their center (PI. IV, fig. IT). The fungus consists of a scanty 

 vegetative mycelium producing globose sporangia, wdiich 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 Avas affected and the 



110 



