646 EXPERIMENT STATION RECORD. 



small, producing wart-like outgrowths and seriously reducing their market 

 value. The disease is said to be very common, and a study has been made of 

 various host plants harboring species of Cladosporium. On the gandul or 

 pigeon pea a species of Cladosporium was found present which inoculated upon 

 young grapefruit produced warty outgrowths, and young lemon plants similarly 

 inoculated developed scab identical in appearance with that caused on lemon 

 leaves by C citri. The pigeon pea is used to a considerable extent as a cover 

 crop, and should it prove a host for the citrus fungus its further employment 

 in this way should be abandoned. 



The coffee disease reported upon is that caused by Cercospora coffeicola, 

 which hitherto has been considered simply a leaf parasite, but the author has 

 found that it also is responsible for a considerable proportion of bad grains of 

 coffee. 



Rot of orange trees in Francofonte, and its treatment, L. Savastano 

 (R. Staz. Sper. Agrum. e Frutticol. Acireale, Bol. 9 (1912), pp. S). — Continuing 

 the work previously noted (E. S. R., 23, p. 149), the authur here deals more 

 particularly with diseases of citrus fruits as affected by local conditions, and 

 states that modifications of cultural methods employed and timely tree surgery 

 or substitution of sound young trees have been followed by good results. 



The hereditary transmission of rust in mallows, L. Blaringhem {Compt. 

 Rend. Acad. Sci. [Paris], 157 (1913), Xo. 26, pp. i53«-i .538). —Referring to the 

 claim previously made (E. S. Jl., 30, p. 453) that in the association of Althaea 

 rosea and Puccinia malvacearum the host is favored by abundance and the 

 parasite by lack of water in the tissues, the author states that later experi- 

 mentation described shows that the addition of 5 per cent of saccharose or 

 glucose to the nutritive solution is followed by a development of rust pustules 

 as the medium dries out, whereas under other conditions no such development 

 is noted. 



A disease of Narcissus bulbs, G. Massee (Jour. Dd. Agr. [London], 20 

 (1914), 'Vo. 12, pp. 1091-1093, pi. 1). — The author describes an injury to Nar- 

 cissus bulbs ascribed to Fusarium bulhigenum, known since 1887 but not until 

 recently recognized as parasitic. 



Very young leaves of Narcissus, about 1 in, long, were inoculated, developing 

 characteristic disease spots in about six days, and others as growth proceeded. 

 It is thought that the process is advanced by secondary as well as primary 

 infection. It is held that soaking slightly diseased bulbs in a fungicide will not 

 kill the mycelium in the bulbs or the resting spores, but that during germina- 

 tion the secondary spores may be destroyed by a dressing of kainit or of 

 potassium sulphate worked into the soil. Rotation with nonsuscei^tible plants 

 is also recommended. 



The technique of operation for rot and gummosis of trees, L. Savastano 

 (R. Staz. Sper. Agrum. e Frutticol. Acireale, Bol. 8 (1912), pp. 15, figs. 11). — 

 The author deals briefly with typical oiierations employed in tree surgery as 

 regards roots and trunks and instruments adapted to the same. 



Notes on diseases of trees in the southern Appalachians, III, A. H. Graves 

 (Phytopathology, 4 (191. i). No. 2, pp. 63-72, pi. 1, figs. 10).— In this paper the 

 author gives an account of diseases of the spruce and hemlock, thus concluding 

 a series of papei's noted elsewhere (E. S. R., 31, p. 348). 



The diseases of spruce described are blight of seedlings, due to Ascochyta 

 piniperda, Sclcrotinia fuckcliana, and Phoma sp. ; twig blight, due to Pcsta- 

 lozzia sp. and Phoma piceana; heart rot, caused by Trametes pint; and frost 

 injury. Among the diseases of hemlock, descriptions are given of the timber 

 rot, due to Fames pinicola; leaf rust, caused by Pucciiiiastrum myrtilli; and 

 twig blight, which is attributed to Rusellinia sp. 



