DISEASES OF PLANTS. 345 



Is golden seal resistant to the root knot nematode? J. A. McClintock 

 (Phytopathology, 4 (1914), No. 1, p. 33). — An investigation was made to deter- 

 mine the accuracy of the popular belief that golden seal is not liable to attack 

 from root knot nematodes and may, therefore, be grown in infested ginseng 

 beds. 



It was found that golden seal plants from Tennessee and from Michigan 

 were badly infected with nematodes, indicating that this plant can not be used 

 to starve out nematodes in infested ginseng beds. 



Report of 1913 infection studies with Fusarium on potato, W. Himmel- 

 BAUE (Osterr. JJngar. Ztschr. Zuclcermdns. u. Landic, JfS (1914), No. J, pp. 

 2-6).— Reporting detailed results of further studies (E. S. K., 30, p. 539), the 

 author states that wound infection with Fusarium subulatum, F. ruMginosum, 

 F. falcatum, and VerticiUium alhoatrum, also with Fusarium taken from sev- 

 eral designated varieties of potato, produced disease symptoms similar to those 

 of leaf roll. 



A Phoma rot of Irish potatoes, I. E. Melhus (Ahs. in Phytopathology, If 

 {1914), No. 1, p. 41). — A report is given of a new storage rot observed prevalent 

 on potatoes grown in Maine. The disease is believed to be due to a species of 

 Phoma, which causes depressed circular areas from 0.5 to 3 cm. in diameter 

 and often extend into the center of the tuber. The results so far as reported 

 indicate that the fungus is a wound parasite most destructive on potatoes in 

 storage. 



Inspection and certification of potato seed stock, W. A. Orton (Abs. in 

 Phytopathology, 4 {1914), No. 1, pp. 39, 40)- — The author outlines a plan for 

 the inspection and certification of potatoes, the certificate to be based on field 

 inspections supplemented by inspection of tlie tubers prior to shipment. The 

 presence of powdery scab, wart, nematodes, Fusarium wilt, VerticiUium wilt, 

 southern brown rot, and leaf roll should disqualify potatoes from certification. 

 The presence of other diseases should receive special consideration. 



Relation of the mosaic of the pepper and the filiform leaf of the tomato 

 to the mosaic of the tobacco, C. A. Schwarze {Abs. in Phytopathology, 4 

 {1914), ^0. 1, p. 42)- — The characters of the mosaic disease of the pepper are 

 said to be practically the same as those shown by similarily affected tobacco. 

 On the tomato the disease is less well known. Here it takes a form called 

 filiform leaf, causing the reduction of the size of the leaf and frequently re- 

 ducing it to nothing but a midrib. The blossoms are also affected, branching 

 is excessive, and the fruit production is greatly reduced. Small portions of 

 diseased pepper and tomato leaves inserted into healthy tobacco plants soon 

 developed the disease. Attention is called to the difference in susceptibility 

 of varieties to this trouble. 



A new rust of economic importance occurring' on pomaceous hosts, H. S. 

 Jackson {Abs. in Phytopathology, 4 {1914), No. 1, p. 4I). — A description is 

 given of the occurrence of an ^Ecidium on the pear and quince in Oregon, 

 foliage, fruit, and stems being attacked and frequently causing considerable 

 distortion. This is believed to be the same rust as that occurring on the apple, 

 crab apple, etc. The ^cidium agrees on all the hosts with ^. blasdaleanum. 

 Although cultural proof is lacking, the author believes the .S^cidium is con- 

 nected with Gymnosporangium blasdaleanum. If this should be true, most of 

 the plants upon which it has been observed are unrecorded hosts for this species. 



An unusual outbreak of apple blossom blight, G. M. Reed {Phytopathology, 

 4 {1914), No. 1, pp. 21-30). — The author reports an unusual occurrence of 

 blossom blight on apple trees in Missouri in 1913. An examination was made of 

 orchards in the vicinity of Columbia, showing that some varieties were entirely 

 free from the blight while others showed varying degrees of the infection. The 



