448 EXPERIMENT STATION RECORD. 



plants should not occupy the soil. In addition the debris of all diseased plants 

 should be collected and burned and not scattered over the soil, as is the common 

 practice. 



A disease of peanuts, A. Zimmerman {Pflanzer, 3 (1907), No. 9, pp. 129- 

 133). — An account is given of a disease of peanuts in German East Africa by 

 which about 10 per cent of the plants were destroyed. The cause of the disease 

 is not definitely determined, but it is believed to be similar to those producing 

 the mosaic disease of tobacco, leaf curl of cassava, and infectious chlorosis of 

 a number of mallows. 



Preliminary note on a new disease of the cultivated vetch, G, F. Atkin- 

 son and C, W. Edgerton (Science, n. set:, 26 (1907), No. 66.',, pp. 385, 386).— 

 In July, 1906, the attention of one of the authors was called to a fungus disease 

 of the cultivated vetch, which does not seem to have been reported. It was first 

 observed on stems and pods in the horticultural grounds of Cornell University 

 and was later brought to the laboratory from fields of vetch growing on the 

 university farm. 



The disease appeared quite abundant and was often associated with an Asco- 

 chyta, especially on the stems. Here the fungi are often mixed together, so that 

 it is probable that they would be confused. When occurring on the pods the 

 disease is easily distinguishetl with the unaided eye, as the gross appearance of 

 the spots and spore pods are very striking. The spots are elongated, forming 

 either long narrow or elliptical spots, sometimes with a dull purple border. The 

 spots on the pods are oblique, probably due to the oblique fibrous structure of 

 the pods. The middle line of the spot is white from the numerous spores formed 

 on the basidia, which later ooze out in masses. 



In the case of the Ascochyta the spots are nearly always circular, and grayish 

 in color, with a dull purple border. * 



The fungus appears to be the type of a new genus for which the name Pro- 

 tocoronospora is proposed. The spec*ies /'. nigricans n. sp. is provisionally 

 described- 



The parasitism of Neocosmospora, E. F. Smith (Science, n. ser., 26 (1907), 

 No. 663, p. 3.'i7-3.'i9). — This is a review and criticism of the experiments and 

 conclusions of H. S. Reetl upon the parasitism of this fungus (E. S, II,, 18, 

 p. 152). 



Apple mildew, E. S. Salmon (Gard. Chron., 3. ser., I^2 (1907), No. 1079, p. 

 166). — A note is given on the occurrence of apple mildew (Podosphccra leu- 

 cotrichn), which it is stated has attacked the fruit in the orchards connected 

 with the agricultural college at Wye, England. In all cases observed the 

 leaves and fruit of the trees were attacked, but as yet no serious injury has 

 been introduced. In many cases the parasitic fungus Ampelomyces quisqualis 

 had attacked the mildew and would no doubt greatly retard its spread. 



Attention is called to the fact that the apple mildew is sometimes erroneously 

 called Spcvrotheca mali. 



The relation of twig cankers to the Phyllosticta apple blotch, W. M. 

 Scott and J. B. Rorer (Reprinted from Proc. Benton Co. [Arfc.], Hort. Soe. 

 1907, pp. 6). — According to the authors, the blotch disease due to Phyllosticta 

 was first reported in a bulletin of the Illinois Station (E. S. R., 13, p. 1059). 

 Since that time the disease has become more widely spread and is now recog- 

 nized as one of the most destructive of the apple fruit diseases in Arkansas. 



During the progress of these investigations there were noticed on the fruit- 

 ing branches and other shoots, particularly the water sprouts, numerous 

 cankers, which contained spore-bearing pycnidia. An examination of these 



