258 EXPERIMENT STATION RECORD. 



1 lb. to 35 to 50 gal. of water, to l)e api^lied with a sprinkler on the scattered seeds, 

 after which they are promptly covered with earth; or the application of stone lime, 

 spreading it before slaking and either covering or harrowing the gromid soon after. 

 Further experiments are to be conducted to establish the commercial value of the 

 methods indicated. 



The Fusicladiums of fruit trees, E. Adekhold {('entbl. Bakf. u. Par., 2. Aht, 6 

 {1900), No. IS, pp. 593-595, pi. 1). — In a previous paper ^ the author gave the results 

 of his investigations on Fiisldad'mm dcndrUkum and F. pirinum, and showed that 

 they were associated in their perithecial form witb VeMuria inivquaUs and V. pirhia. 

 In the present jjaper studies on the host plants and scientific relationships are dis- 

 cussed, especial attention being given to F. ceraM. For this species the author 

 describes the perithecial form as. Venturia cerim, n. sp. Its host plants are said to 

 be the various stone fruits in cultivation and doubtless many of the wild species of 

 Prunus. The host plants for F. deyidriticuni are said to be Pyrus malus and its related 

 species. A variety also occurs on Sorbus, and in all probability attacks various 

 species of Crataegus. F. pirinuvi attacks species of Pyrus belonging to the group 

 Pirophora. Infection experiments with F. pirinum showed the spores began germi- 

 nation at about 2° C, and were very active between 10 and 20° C. The entrance of 

 the mycelium to the host plant is believed to be due to the presence of a ferment. 

 The period of incubation was found to be from 12 to 14 days. As a means for com- 

 bating these diseases, the author recommends the collection and burning of all fallen 

 leaves, winter spraying with a strong copper sulphate solution, and 3 ai^plications of 

 Bordeaux mixture during the growing season. 



The Fusicladiums of fruit trees, R. Adekhold (Landir. Jahrb., 29 {1900), No. 

 4-5, pp. 541-588, pis. 4)- — The author describes at length a number of species of 

 Fusicladium which occur on the more common fruit trees. The biology of the 

 fungi, their scientific relationships, and numerous inoculation experiments are given, 

 together with suggestions for the prevention of the diseases. The substance of this 

 paper is noted above. 



Monilia fructigena as a cause of diseases of fruit trees, L. Montemartini 

 {Riv. Patol.Veg., 8 {1900), Nos. 7-12, pp. 210-:?1S).—A description is given of this 

 fungus, which causes the rot of many fruits. Its parasitism and methods of propaga- 

 tion are described. Various' remedial measures are suggested, among them the use of 

 sulphur on the ripening fruit, or spraying with Bordeaux mixture. A bibliography 

 of about 50 titles relating to this suljject concludes the paper. 



The fungus diseases of orange trees in Brazil, F. Noack {Ztschr. Pflanzen- 

 hrcrnk., 10 {1900), No. 6, pp. 321-335, jd. 1). — The author describes a number of 

 diseases of orange trees caused by parasitic fungi, several of the species of which 

 have been hitherto undescribed. The fungi causing these diseases are Mycosphserella 

 loefgreni, n. sp., Septoria loefyreni, n. sp., Oplnonectria coccicola, CoUetotrichum gloeospo- 

 rioides, Glcjcosporium spegazzitd, and Didymella cifri, n. sp. The technical characters 

 of the new species are given, the nature of their attack upon the host, and, so far as 

 known, suggestions given for the prevention of the disease. 



Diseases of the pear, L. De Nobele {BuI. Arhor.et Flor., 1900, jip. 45-48, 124- 

 127, IS8-I4O, 199-201, 208-240). 



A monograph of the Peronosporaceae, A. N. Beklese {Riv. Putol. Veg., 9 {1900) , 

 Nos. 1-5, pp. 1-126, figs. 21). — This contribution is in continuation of a previous paper 

 (E. S. R., 10, J). 561), treating of the downy mildews, etc. In the present paper the 

 genera Cystopus, Phytophthora, Basidiophora, Plasmopora, and Sclerospora are 

 described. The morphological and l)iological characters of the fungi are described 

 at some length, in addition to the usual systematic diagnosis of the sjjecies. Where 

 the fungi are the cause of diseases of imijortant economic crops the method of attack 



iLandw. Jahrb., 1896^ p. 875. 



