840 EXPERIMENT STATION RECORD. [Vol. 37 



Tylenchus tritici on wheat, L. P. Byars (Phytopathology, 7 {1917), No. 1, 

 pp. 56, 57). — The author reports having determined the presence of the nema- 

 tode T. tritici in wheat heads transmitted through the Office of Cereal Investi- 

 gations of this Department from Nanliing, China. The data presented are 

 offered in order that measures can be tal<en to prevent the introduction of thus 

 parasite with wheat importations from infested countries. 



Bean diseases in New York State in 1916, W. H. Bubk holder {Abs. in 

 Phytopathology, 7 (1917), No. 1, p. 61). — In continuation of a report on diseases 

 of the field bean (E. S. R., 36, p. 248), the author states that the most serious 

 disease is due to a species of Fusarium which is considered nearly identical with 

 F. martii. This causes a dry root rot of the bean plant. The organism is said 

 to winter over in manure where bean straw has been used as feed, and there is 

 evidence that it may live for several years in the soil. All varieties of beans 

 are about equally susceptible to the attack of this fungus, although certain 

 undesirable types of the white marrow are very resistant, and a few individuals 

 of these have been selected for breeding experiments. 



A blight, caused by 'bacterium phaseoli, and mosaic are said to have been 

 rather conspicuous in the bean crop of 1916, while the anthracnose which was 

 destructive in 1915 caused little damage in the following year. The author 

 claims that there is some indication that B. phaseoli causes a stem girdling. 



Bacterial diseases of celery, W. «. Krout {Abs. in Phytopathology, 7 (1917), 

 No. 1, p. 64). — The author gives a description of a crown rot of celery which 

 appears to be caused by a bacterium working simultaneously with a species of 

 Fusarium, a crown rot wilt, and a bacterial heart wilt. 



Wintering of Septoria petroselina apii, W. S. Krout {Abs. in Phytopathol- 

 ogy, 7, {1917), No. 1, p. 65). — As a result of the author's studies, it is believed 

 that the above fungus is not carried on celery seed but in manures containing 

 diseased, decomposed plants and probably by other methods. Laboratory in- 

 vestigations have shown that heating celery seed at 50° C. (122* F.) for half 

 an hour will eliminate all chances, if there are any, of the disease being dissemi- 

 nated through the seed and pedicles. 



Dissemination of the organism of cucumber anthracnose, M. W. Gardner 

 {Abs. in Phytopathology. 7 {1917), No. 1. pp. 62, 6S).—Thc author presents evi- 

 dence indicating that this disease of cucumbers is introduced by the seed and 

 that subsequent spread is largely due to .surface drainage. 



Do the bacteria of angular leaf spot of cucumber overwinter on the seed? 

 E. Carsner {.ibs. in Phytopathology, 7 {1917), No. 1. pp. 61, 52).— The fact that 

 angular leaf spot appeared only on seedlings in six fields planted with seed from 

 the same source and not in other fields in the vicinity is considered by the 

 author as a basis for the hypothesis that the causal organism is seed-borne. 



Preliminary notes on a new leaf spot of cucumbers, G. A. Osnkr {Abs. in 

 Phytopathology, 7 {1917), No. 1. p. 52).— During the seasons of 1915 and 1916, 

 the author's attention was called to a peculiar leaf spot on cucumbers which 

 was causing more or less damage in a number of fields. The spots for the 

 most part were small and limited by the veins of the leaf. The disease is 

 claimed to be due to a fungus, the exact generic position of which has not yet 

 been determined. 



Virulence of different strains of Cladosporium cucumerinum, W. W. Gil- 

 bert {Abs. in Phytopathology, 7 {1917), No. 1. p. 62). — As a result of investiga- 

 tions the author has found that different strains of C. cucujiwrinutri vary widely 

 in their ability to infect cucumber plants, some virulent strains killing the 

 plants in two to four days, while nonvirulent strains failed to produce infection. 

 Similar results were obtained from the inoculation of young cucumbers in moist 

 chambers. 



