348 EXPERIMENT STATION EECOED. 



proved absolutely immune in 1910. All of the 5 varieties gave a fairlj" clean 

 sample during both periods. 



In some .of the soils the resistant varieties gave poor yields, while in others 

 they gave good returns. On the same soils the check experiments with non- 

 resistant varieties gave badly infected tubers. 



It is therefore claimed that, by planting resistant varieties which are suited 

 to the soil conditions, a good crop can be obtained even on land badly infected 

 with the disease. 



Diseases of sugar cane, L., C. and A. Maublanc {Agr. Prat. Pays Chauds, 10 

 {1910), Nos. 90, piJ. 232-252, figs. Jf; 91, pp. 312-320, fig. 1; 92, pp. 879-400, figs. 

 4; 93, pp. 502-506, fig. 1). — Descriptions are given of a number of the more 

 important diseases of the sugar cane, the information being largely drawn 

 from the notes and work of G. Delacroix. 



The principal fungi causing the diseases are ThielaiHopsis paradoxa, Gonio- 

 thyrium sacchari, LasiodiplodUi theohromw, Marasmius sacchari, Scliizophyllum 

 commune, and Ithyphallus Impudicus. 



Descriptions are also given of some of the bacterial diseases of cane, together 

 with an account of the disease known as sereh and a number of the other less 

 known diseases. 



Blackleg' or Phoma wilt of cabbage, T. F. Manns (Science, n. ser., 32 (1910). 

 No. 829, pp. 726, 727 ) .^Attention is called to the appearance of Phoma oleracea 

 in the cabbage districts of Clyde and Fremont, Sandusky County, Ohio, where 

 it has, in conjunction with the Fusarium wilt, driven many cabbage growers 

 out of business. During 1910 the disease has been reported from several other 

 localities in the State. It is apparently new to the United States, but has been 

 for many years a source of serious loss to cabbage and cauliflower growers in 

 various European countries, and also in Australia. 



White, slightly sunken, elongated oval areas appear on the stems, usually 

 below the point of leaf attachment. Soon small black pycnidia appear in these 

 lesions, from which myriads of spores are discharged at the time of trans- 

 planting. Later these lesions break and bacterial decay sets in. The collar rot 

 is effected by the confluence of the lesions involving the destruction of the 

 cambium, causing the margins of the outer leaves to take on a reddish color, 

 followed shortly by wilt and a quick collapse of the entire plant. Soon the 

 stem becomes so badly rotted that the wind often breaks the plant loose from 

 the roots and blows it away. One-half to two-thirds grown plants are usually 

 the worst attacked by the disease. 



A preliminary bulletin concerning the nature of the disease and methods of 

 control is being prepared. 



Mycological notes, F. von Hohnel (Sitzber. E, Akad. Wiss. [Viennali, Math. 

 Naturw. Kl., 118 (1909), I, .Yo. 9, pp. 1J,61-1552, fig. i).— In a taxonomic dis- 

 cussion of various species of fungi the author describes a new cruciferous rust, 

 Puccinia streptanthi n. sp., on the stems of Streptanthus sp. in California. 



Apple bitter rot, C. P. Lounsbury {Agr. Jour. Cape Good Hope, 37 {1910). 

 No. Jf, pp. 355-36^, pi. 1). — The presence of bitter rot (Glomerella rufomacu- 

 lans) is reported in several districts in Cape Colony, where in some instances 

 it has become a serious menace to the culture of certain varieties of apples. 

 The symptoms, means of distribution, and methods of control are given. 



The use of sulphate of iron in attacks of chlorosis, "SI. Coffigniez (Prog. 

 Agr. et Vit. (Ed. VEst-Centre), 31 (1910), Yo. J,5, pp. 577-579).— The author 

 gives a report of experiments begun in 190S. in which he introduced sulphate 

 of iron into pear trees badly attacked with chlorosis. In subsequent seasons 

 when the leaves were put out they had regained their normal green color and 

 heavy crops of fruit were produced. 



