240 SUMMARY OF CURRENT RESEARCHES RELATING TO 



of plants. He ascribes the widespread epidemics to the action of the 

 wind which scatters the light spores. Following that, the fungus requires 

 for growth a period of moisture and a still atmosphere. In Hungary it 

 was found that an Oidium year on the vine was preceded by south- 

 west and south winds with low temperature. Peronospora was more 

 prevalent in the absence of these conditions. 



E. J. Butler has studied * the wilt disease of pigeon-pea. He found 

 on the roots perithecia of Neo-cosmospora vasinfecta, but they were 

 purely saprophytic on wilted plants. The disease is due to a Fusarium 

 of which the perfect fruits have not yet been found. 



F. C. von Faber f records a disease of coffee plants which is caused 

 by a fungus Ascospora Coffese sp. n. It causes the leaves to wither and 

 fall off. By cultures he found the pycnidial and perithecial stages of 

 the fungus. 



Perley Spaulding $ describes a number of cases in a greenhouse 

 where plants were damaged by Botrytis vulgaris. On Chrysanthemum 

 plants it attacked the petals at the tips, which soon died down to the base. 

 The disease spread very rapidly on any and all of the flowers. Other 

 attacks in the following years occurred. Two years after the first 

 appearance, Poinsettia leaves were destroyed, and finally a number of 

 plants of Primula. The lower leaves, which lay flat on the ground, 

 were infected and finally killed by the fungus. There has been little or 

 no previous mention of disease caused by Botrytis in the United States. 



Ahnaud, G. — Contribution a l'Etude des Fumagines. (Contribution to the study 

 of Fumagines.) 



[By " Fumagines " the author understands fungi belonging to the life-cycle 

 of Sphaeriaceee.] 



Ann. Ec. Nat. Agric. Montp., ser. 2, ix. (1910) pp. 239-77 (3 pis.). 

 See also Bot. Centralbl., cxvi. (1911) p. 14. 



Bertrand, Gabriel, & M. Javillier — Influence du Manganese sur le 

 Developpement de l'Aspergillus niger. (Influence of manganese on the develop- 

 ment of Aspergillus niger.) 



[Description of cultural experiments.] 



Comptes Rendus, clii. (1911) pp. 225-8. 



Buchanan, R. E. — A New Species of Thyrococcum. 



[The species T. humicola was isolated from humus and cultivated on agar 

 plates.] Mycologia, iii. (1911) pp. 1-4 (2 pis.). 



Garrett, A. 0. — Smuts and Rusts of Utah. 



[Ustilaginese and Uredinese collected by the author, the results of eight 

 years of field-work. 142 specimens.] Mycologia, ii. (1910) pp. 265-304. 



Gueguen, Fern and — Sur la Non-Specificite botanique des Champignons des 



Teignes. (On the non-specific character of scurf 

 fungi.) 



[The author considers them as sterile niyceha 

 of Gymnoasceae.] 

 C.E. Soc. Biol. Paris, lxix. (1910) pp. 495-7. 



* Mem. Dept. Agric. India, Bot. Ser. ii. 9 (1910) pp. 1-60. See also Bot. 

 Centralbl., cxvi. (1911) pp. 45-6. 



+ Teysmannia, xxi. p. 548. See also Bot. Centralbl., cxvi. (1911) p. 46. 

 X Kept. Missouri Bot. Garden, xxi. (1910) pp. 185-8 (1 pi.). 



