630 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Kock and Kornauth* give their experiences in combating th< 

 mildew of Cucurbitaceae. Different genera within the order show 

 considerable variation in their liability to disease, probably due to the 

 type of leaves. Bordeaux mixture was found to be the best fungicide. 

 Heavy rains and high variation of temperature favoured the appearance 

 and dissemination of the disease. 



W. M. Scott and J. B. Rorerf describe the apple-leaf spot caused by 

 Sphcvropsis malorwn. A number of other microfungi grow on the 

 diseased leaves, notably Goniothyrium pirinum. Spraying with Bordeaux 

 mixture has been found of service. 



L. C. Shear $ has given the results of a series of investigations on 

 Cranberry diseases caused by different fungi, and resulting in scald on 

 the berry, blast which attacks the flower, rot caused by Acanthorhyncus 

 Vacciiui, and anthracnose due to Glomerella rufomaculcms-vaccinii. In 

 addition, cases of hypertrophy caused by Exobasidium are discussed. 



J. L. Spaulding§ describes the effect of PltgUostirta solitaria on 

 apple, causing fruit-blotch disease, and occurring on branches, leaves, 

 and fruit. A blight disease of young conifers was found by the same 

 author to be due to a species of Pestalozzia, and a heart-rot of Sassafras 

 to Fomes Rib is. He describes the manner in which the fungus attacks 

 the tree and develops in the tissues. 



F. L. Stevens |) describes two apple fungi : Hypochnus ochraleaca, 

 which occurs extensively on apples and quinces in North Carolina, and 

 a form of Phoma, or PhyMosticta, which causes a canker of the apple, 

 and has proved very destructive to the trees. 



. G-. F. Atkinson and C. W. Edgerton^f publish a preliminary note on 

 a new disease of the cultivated vetch, causing spots on the pods. They 

 propose a new generic and specific name, Protocoronospora nigricans. 



E. H. Smith ** finds that a Fusarium, probably F. Solani, causes 

 the blossom end-rot of tomatoes. A detailed description of the fungus 

 is given ; the paper is well illustrated. 



A disease of chestnut trees was discovered in 1905 in Bronx Park, 

 New York, and described by W. A. Murrill ft as due to Diaporthe 

 parasitica. The parasite has attacked other species of Castanea, and 

 the disease has spread largely in the neighbourhood. 



P. Cruchet J J describes new parasites on Polygonum alpinwm, 



* Zeitschr. Landw. Versuch. Oesterr., 1908, p. 128. See also Ann. Mycol., vi. 

 (1908) p. 169. 



t U.S.Dept. Agric. Bull., No 121, part 5 (1908 )pp. 47-54 (2 pis.). See also Ann. 

 Mycol., vi. (1908) pp. 169-70. 



: Bull. Bur. PI. Lad., No. 110 (1907). See also Bot. Centralbl., cvii. (1908) pp. 

 147-8. 



§ Science, xxvi. (1908) pp. 183, 220, 479. See also Bot. Centralbl., cvii. (1908) 

 pp. 148-9. 



|i Op. cit., xxvi. (1907) p. 724. See also Bot. Centralbl., cvii. (1908) p. 313. 



i Torn, cit., p. 386. See also Bot. Centralbl., cvii. (1908) p. 357. 

 ** Mass. Agric. Exp. Stat. Techn., Bull. No. 3 (1907) 6 drawings and photos. 

 See also Bot. Centralbl., cvii. (1908) p. 357. 



ft Journ. New York Bot. Gard., ix. (1908) pp. 23-30. See also Bot. Centralbl., 

 cvii. (1908) p. 594. 



XX Bull. Herb. Boiss.. ser. 2, viii. (1908) pp. 245-7. See also Bot. Centralbl., 

 eviii. (1908) p. 94. 



