170 PATHOLOGY [Bot. Absts. 



crops are not seriously injured; also plants with fine, slender roots are not much affected owing 

 to the habit of the fungus of developing in roots of some thickness. The "French pear" is 

 apparently immune while the trees are growing healthily, and black walnut and fig are con- 

 sidered highly resistant. Apples are more resistant than stone fruits and Myrobolan plum 

 is apparently somewhat more resistant than peach or almond. — E. L. Overholser. 



1177. Laffer, H. E. Diseases of the vine. Jour. Agric. South Australia 21: 462-471. 

 7 fig. 1918. — Anthracnose or black spot, caused by Manginia ampelina. The disease and the 

 organism are illustrated and described following closely the work of Viala and Pacottet. — 

 Sultana is the most susceptible variety, and is followed by Waltham Cross. Shiraz and Mataro 

 appear to be almost immune. — D. Reddick. 



1178. Link, G. K. K. Potato losses in transit. Potato Mag. I 10 : 5-7, 26-27. 3 fig. 1919. 

 — Discusses causes, importance, control, and market inspection service. — Donald Folsom. 



1179. Mangin, Vincet, Haller and Hennegtjy. Le deperissement des Epiceas dans 

 la vallee de l'Arve. (Chedde et Chamonix). [Discussion on death of spruces in the Arve valley.] 

 Compt. Rend. Acad. Agric. France 1919: 113-115. 1919.— The death of eight-tenths of the 

 spruces in the region of Chedde and Chamonix in the valley of the Arve is probably due to 

 the chlorine fumes escaping from the factories there during the manufacture of various chem- 

 icals for war uses. — E. A. Bessey. 



1180. Miller, Justus. Northern Ontario seed potato trade. Potato Mag. l u : 5, 33-34. 

 1919.— See Bot. Absts. 3, Entry 881. 



1181. Moreau, Fernand. Sur une Tuberculariacee parasite du Buis, le Volutella Buxi 

 (Corda) Berk. [A Tuberculariaceous parasite on box, Volutella Buxi.] Bull. Trimest. Soc. 

 Myc. France 35: 12-14. Fig. 1. 1919.— See Bot. Absts. 3, Entry 1135. 



1182. Muncie, J. H. Report to the Botanist. Rept. Michigan State Bd. Agric. 1917: 

 303-304. 1917 (1918). — Experimental work in the control of bean diseases are outlined. Re- 

 view of Michigan Techincal Bulletin 38. — G. H. Coons. 



1183. Muncie, J. H Experiments on the control of bean anthracnose and bean blight. 

 Michigan Agric. Exp. Sta. Tech. Bull. 38. 50 p., 4 pi- 1917 (1918).— A consideration of the 

 control measures of Colletotrichum lindemxdhianum and Bacterium phaseoli. Diseases are 

 recognized as being seed borne and spread during wet weather by cultivation. Thermal 

 death point for the spores of Colletotrichum lindemuthianum lies between 45 and 48°, while 

 old mycelium will endure exposure for ten minutes in liquid culture at 65°. — Both organisms 

 may be carried to the field in bean trash or manure containing bean trash, but neither organ- 

 ism survives passage through the alimentary tract of cattle. — Negative results are reported 

 in the use of chemical solutions and wet and dry heat for the control of the diseases. — Suc- 

 cessful experiments in the use of seed of Michigan origin grown for a year in the arid West 

 are reported. Control measures based on this practise are recommended. The article has 

 a bibliography of 50 titles. — G. H. Coons. 



1184. Murphy, P. A. Seed potato inspection service in Canada. Potato Mag. I 10 : 8, 28, 

 31. 7 fig. 1919— See Bot. Absts. 3, Entry 918. 



1185. Neger, F. W. Die wahre natur der russtaupilze. [True nature of sooty molds.] 

 Naturwissensch. 6: 30-32. 1918. 



1186. Orton, C. R., and F. D. Kern. The potato wart disease: A new and serious dis- 

 ease recently discovered in Pennsylvania. Pennsylvania Agric. Exp. Sta. Bull. 156. 16 p., 

 4 fig. 1919. — Part I includes a brief discussion of the history of potato wart and its discovery 

 in America; the symptons of the disease, its distribution in Pennsylvania and a discussion 

 of preventive measures. Part II discusses the cause of the disease, Chrysophlyctis endobio- 



