DISEASES OF PLANTS. 653 



No. 10, pp. 344-347).— Notes the distribution aud methods of attack and suggests 

 means for the prevention of Agaricua adiposus and Polyporus hartigii. 



Notes onapple canker, W. Paddock (Science, n. ser., S (1898), jVo. 206, pp. 836,837).— 

 It is stated tjiat Spharopsis malorum is in all probability parasitic on the wood of the 

 pear and quince as well as upon the apple. Inoculations made from cultures from 

 the 3 kinds of wood produced diseased fruits in every case. 



Some important pear diseases, B. M. Duggar (New York Cornell Sta. Bpt. 1898, 

 pp. 596-627, figs. 16, dgm. 1).—A reprint of Bulletin 145 of the station (E. S. R., 10, 

 p. 150). 



The lily disease (Amer. Gard., 19 (1S98), No. 210, p. 53.?).— The views of Peter 

 Barr on the cause of the lily disease are given, in which it is attributed to weakness 

 of plants, due to exhausted condition of Bermuda soils where bulbs are grown. 

 American and Holland bulbs are expected to be free from this trouble. 



A new disease of cultivated palms, W. Trelease (Bpt. Missouri Bot. Gardens, 

 9 (18DS), p. 1~>9, fig. 1). — Exosporium palmivorum, a new species by Saccardo, is figured 

 and described as the cause of a disease of Phfjcnix canariensis, P. tenuis, and P. reclinata. 



Fungus and insect pests of the red beech in the Alsacian forests, Stroh- 

 meyer (Forstl. Naturw. Ztschr., 7 (1898), No. 9, pp. 316-319). 



Distribution of potato diseases in Germany, Frank (Dent. Landw. Presse, 25 

 (1S98), No. 32, pp. 347,348 ; abs. in Bot. CentbL, 76 (1S9S), No. l,pp. 26, 27).— Diseases 

 due to Thytophthora, Rhizoctonia, Phellomyces, and the bacterial diseases are said 

 to be generally distributed throughout the country. Fusarium is not found in 

 Brandenburg nor in the Kingdom of Saxony. Nematodes are reported as particu- 

 larly destructive in 9 states and provinces. A considerable variation in resistance 

 of varieties to disease is also reported. 



Some observations bearing upon the symbiotic mycoplasm theory of grain 

 rusts, H. L. Boixey (Proc. Amer. Assoc. Adv. Sci., 47 (1898), p. 408). — The author 

 reviews the work of Eriksson relative to the rusts of cereal grains and other 

 grasses. He dissents from the view given by Eriksson that there is any indication 

 of a mycoplasm infection. The author gave au outline of experiments in which he 

 grew cereals to maturity in rust-proof cages without any infection whatever, 

 although every plant close by bore numerous pustules. Incidentally it is stated 

 that the germ tubes of the uredo-spores may enter not only by way of the stomata, 

 but also directly through the cuticle of wheat and oat plants. 



The smuts and blights of cereals, E. Thomas (Jour. Soc. Agr. Brabant- Hainaut, 

 1S98, No. 38. 



Chrysanthemum rust, G. Abbey (Jour. Eort., 50 (1898), No. 2611, pp. 284, 285, 

 jigs. ,:).— The uredo aud puccinia forms of this rust are figured and described. The 

 author thinks the method resorted to in forcing the plants is largely responsible for 

 the disease. Bordeaux mixture is recommended as an efficient fungicide. Washing 

 the plants with a permanganate of potash solution is also mentioned as an effective 

 treatment. 



Twig galls of the pine, K. von Tubeuf (Forstl. Naturw. Ztschr., 7 (1898), No. 9, 

 p. 321). 



Parasites of the willow, E. Crotjzel (Les parasites du saule. Paris: Soc. a" Edit. 

 Scientifiques, 1898, pp. 36). — Treats briefly of the principal fungus and insect pests 

 of willows, with means for their prevention. 



Some coffee pests, A. Zimmermanx ( Tegsmannia, 9 (1898), No. 9-10, pp. 402-421). — 

 In an address before the Coffee Congress at Malang the author mentioned some of 

 the more destructive enemies of coffee culture, among them being nematodes, Tglen- 

 chus coffew being especially troublesome. 



The influence of potash fertilizers on "beet sickness," M. Hollrung (Ztschr. 

 Ver. Deut. Zuckerind., 1898, pp. 343; abs. in Bot. CentbL, 76 (1898), No. 7, pp. 243, 

 244).— The author concludes, from an extensive series of experiments, that potassium 

 carbonate, and especially potassium magnesium carbonate, exert a favorable influence 

 in correcting "beet sickness'' of soils. 



