748 EXPERIMENT STATION RECORD. [Vol.36 



In various countries since it was first noted by Lagerlieim near Latacunga, 

 Ecuador. Tliere is added a discussion of related species and of diseases, more 

 or less similar, of oilier plants. 



Diseases of asparagus and of melon, G. Aenaud (Ann. 8erv. Epiphyties, 

 Mem. et Rap., 2 (1913), pp. 273-284, figs. 9).— The author reports a study on the 

 fungus causing a disease of young asparagus plants, described as Alelanospora 

 asparagi n. 9p., also on a disease of melon. The conidial form of the latter, 

 previously described under several other names, is supposed to belong to the 

 genus Fusarium, the perfect stage of which may be a Melanospora found in 

 connection therewith. 



Fungus and bacterial diseases of clover, A. A. flcHEVSKii (Jaczewski) 

 (Min. Zeml. [Russia], Bvuro Mikol. i Fitopatol., Uchen. Kom. [Pub.], 1916, pp. 

 64, figs. 25). — The author gives a list and descriptions of about 30 distinct 

 diseases affecting the clover plant in Russia. 



The majority of these are more or less known in the United States but 

 special attention is called to two parasitic diseases, namely, a crown rot due to 

 Fusarium, trifolii n. sp., and a blossom mold caused by GEdocephalmn (Botrytis) 

 anthopMlum n. sp. The mycelium of the latter parasite penetrates the seeds, 

 thus carrying the disease from year to year and malting its control difficult. 



The blossom mold canker (Sclerotinia trifoUorum) and anthracnose (Glceo- 

 sporium cauUvorum) are considered the most serious troubles of clover and are 

 widely distributed throughout the country. Rusts and leaf spots, although 

 quite prevalent, do not cause material damage. Control measures, general as 

 well as specific to individual diseases, are briefly mentioned. A list of 28 

 saprophytes, frequently associated with the diseased tissues, is appended, in 

 order to assist observers in recognizing the primary cause of the trouble. 



A new disease of the flowers of red clover and its relation to seed produc- 

 tion, A. S. BoNDAETSEV (BoNDARZEw) (Zap. Sta. Isp. Si^m: Imp. Bot. Sad. (Ann. 

 Samenpriif. Anst. K. Bot. Gart. Peter Grossen), 2 (1914), No. 3, pp. 23, pis. 3, 

 figs. 6). — The author reports on a fungus attack on the flowers of the red 

 clover. The cause of the trouble Is said to be Botrytis antJiophila n. sp. The 

 mycelium permeates the entire plant, growing intei'cellularly, and it produces 

 its conidia in the anthers of the flowers, causing abnormal pollen grains of low 

 germinative power. The mycelium has also been found within the seed coats, 

 indicating that the disease may be seed-borne. Infected plants produce less 

 seed than normal ones, and its specific weight is somewhat lower, but the ger- 

 mination of diseased seed was higher than that of sound seed. The forage 

 production of the plants was not found to be influenced by the fungus. 



A technical description of the fungus is given. 



Belation of soil temperature to infection of flax by Fusarium lini, W. H. 

 TiSDALE (Phytopathology, 6 (1916), No. 5, pp. 412, 413). — In connection with 

 an experimental study of flax wilt, the author has determined that the critical 

 temperature for infection of flax by F. lini is about 15 to 16° C. (59 to 

 60.8° F.). 



[Report of the assistant in plant pathology ], J. H. Muncie (Michigan Sta. 

 Rpt. 1916, pp. 276, 277). — A brief account is given of work caiTied on by the 

 author on control measures for anthracnose and blight of beans. Attention is also 

 called to a stem disease of beans that has caused serious damage to the crop. 

 The stem is attacked at the first node, the plant is girdled, and it usually breaks 

 over when the beans are about half mature. This disease is receiving furthei- 

 study. 



Celery leaf spot (Gard. Chron., 3. ser., 60 (1916), No. 1556, p. 196).— In a 

 summary of results of recent experimentation regarding the prevention and 

 control of leaf spot of celery, which is said to have been particularly prevalent 



