456 EXPERIMENT STATION EECOED. 



The bud rot of coconut palm, J. B. Rorer {Bui. Dept. Agr. Trinidad, 9 

 (1910), No. 6Ji, pp. 22-29). — A brief summary of investigations on tbe bud rot 

 of coconut palm is given as an introduction tO' a paper by J. R. Johnston on 

 the coconut palm disease of Trinidad. In this paper different conclusions 

 from those reported by other investigators are reached concerning the cause of 

 this most serious disease, the author attributing the bud rot to bacteria rather 

 than to fnngus attaclvs. 



Notes on some diseases of trees in our national forests, G. G. Hedgcock 

 {AI)s. in Science, n. ser., 31 {1910), No. 802, p. 751). — Notes ai'e given on the 

 occurrence and distribution on a large number of hosts of the following wound 

 parasites which attack forest trees: Polyporus dnjophiliis, P. oMusiis, P. sul- 

 phureus, P. schweinitzii, Fomes igniarius, F. applanatus, F. laricis, Trametes 

 pint, and Echinodontium tinctorium. In addition the author calls attention to 

 the injury to coniferous trees by species of Razoumofskya, and Peridermium 

 coloradense is noted as occurring on Picea engclmanni and Peridermium ela- 

 ti/num on species of Abies. 



Successful inoculations are reported with uredospores of Cronartium quer- 

 cmim on leaves of a number of species of oak, while the teleutospores of the 

 same fungus produced galls on the twigs of young trees of Pimis rirginiana. 



The chestnut bark disease, H. Metcalf {Abs. in Science, n. ser., 31 {1910), 

 No. 802, p. 748). — The author affirms the active parasitism of Diaporthe para- 

 sitica, having verified it by nearly 500 successful inoculations. The lesions 

 caused by the fungus may occur on any or all parts of a tree above ground, 

 the most common places being crotches, the base of the trunk, and the ultimate 

 twigs. It is claimed that the parasite can enter without any visible breaks in 

 the bark, but that wounds usually form the means of entrance. Winter injury 

 is held to bear no relation to the bark parasite except as offering the fungus 

 opportunity for entrance through wounds. The present range of this fungus 

 is said to be from Saratoga County, N. Y., and Suffolk County, Mass., to 

 Bedford County, Va., Greenbrier and Preston Counties, W. Va., and Westmore- 

 land County, Pa. 



Polystictus hirsutus as a wound parasite on mountain ash, J. B. Pollock 

 (Abs. in Science, n. ser.. 31 (1910), No. 802, p. 75'/). — The occurrence of this 

 fungus on two mountain ash trees at Ann Arbor, Mich., is reported. The obser- 

 vations seem to show that the fungus is not only a wound parasite, destroying 

 the dead heart of the tree, but that it also slowly and progressively attacks the 

 cambium, gradually killing the tree. 



European currant rust on white pine in America, P. Spaulding (Abs. in 

 Science, n. ser., 31 (1910), No. 802, pp. 756, 757).— The two stages of the rust, 

 one occurring as Peridermium strobi on the white pine and the other as Cronar- 

 tium ribicola upon leaves of Ribes are described. An account is given of the 

 introduction of the form on the white pine in seedlings imported in 1909 

 (E. S. R., 21, p. 748), and attention is called to the necessity for checking such 

 importations or providing for inspection of nurseries when imported seedlings 

 are planted. 



Morphology and life history of Puccinia malvacearum, J. J. Taubenhaus 

 (Abs. in Science, n. ser., 31 (1910), No. 802, p. 7^7).— After describing the 

 morphology of the hollyhock rust, the author gives an account of its life history, 

 particularly with reference to its hibernation. 



The fungus, he finds, is carried over winter as developing mycelium, as hiber- 

 nating teleutospores, and with the seeds. Late in the fall young sprouts are 

 developed, which during the winter show evidence of infection. From infected 

 leaves teleutospores were germinated, which produced an abundance of sporidia 

 about the middle of the winter, proving that tbe fungus could be carried over 



