DISE ^BE8 OF PL Wis. 1 H > 7 



Witches brooms of fir trees, K. von Tt beui Naturw. Ztschr. Land a. Forstw., ■>' 

 {inn:,.) No. 6, pp. 253-260, figs. 5).— Illustrated descriptive notes are given on a num- 

 ber of forma of wit< hes brooms observed on fir tre< 9. 



Notes on Thelephora laciniata, K. von Ti bei i Naturw. Ztschr. Land u. Forstw., 

 S (1905), Nos. 2, pp. 91, 92, fig. 1; ;. pp. 181 l89,figs.S). Brief accounts are given 

 of attacks of Thelephora laciniata on young fir trees. The fungus, while not a true 

 parasite, surrounds the lower parts of the seedling, ultimately causing its destruction. 

 Very small seedlings are especially subjecl to attack. Moisture favors the develop- 

 nicnt of the fungus. The seedlings should be thinned and stimulated by the use of 

 fertilizers to make rapid growth. The same fungus is reported as injuring one-year- 

 old beech seedlings. 



Further studies on Melampsora occurring- on willows in Switzerland, 

 0. Schneideb {Centbl. Bakt. [etc.], 2. AbL, 15 (190 ?, pp. 282 284). The 



results of inoculation experiments with Melampsora ribesii-grandifolia and M. taricir 

 reticulata are given, in which notes are presented on the teleutospore and Caeoma 

 stages of the fungi. 



The occurrence of timber dry rot in Russia, L. von Lubimoff (Ztschr. Osterr. 

 Ingen. ArchitekL Ver., 1905, p. 868; abs. in Centbl. Bakt. [etc.], ./. AbL, 15 I 1906 . No. 9, 

 pp. 269, 270). — The rapid extension of railroad building, in which construction tim- 

 ber so largely enters, has served to call attention to the timber dry rot caused by 

 Merulius lachrymans. The loss due to this fungus is said to be very great To pre- 

 vent its. attack various preservatives have been employed, such as carbolineum, 

 creosote, various tar oil and proprietary compounds, corrosive sublimate, etc., and 

 notes are given on their use and relative efficiency. 



A sclerotium disease of Forsythia, A. < >>ti:ku aldeb I Ztschr. Pflanzenkrank., 16 

 (1905), No. 6, pp. 821-829, pi. J). — A description is given of a disease of the orna- 

 mental shrubs Forsythia intermedia and /•'. suspensa which is attributed to Sclerotinia 

 libertiana, and the relation of certain conidia to the fungus is discussed. The stems, 

 leaves, and flowers of the shrubs appear to be subject to attack of the fungus, which 

 has proved quite destructive. The disease has been noticed for several year.-, hut a 

 careful search made in the spring of 1905 failed to show the wintering form of the 

 fungus through the development of germinating sclerotia. 



The resistance of various varieties of roses to rust, R. Ewert I Naturw. Ztschr. 

 Land u. Forstw., ■>' ( 1905), No. 6, pp. 249-252). — In L903 investigations wen- begun at 

 the Botanical [nstitute of Proskau on the rose rust due to Phragmidium subcorticium, 

 and observations were made on the relative susceptibility of various classes and varie- 

 ties of roses to the fungus, the observations being extended to cover the years 1903 

 and L904. 



Except in the hybrid perpetual class there was relatively little disease either year, 

 and during 1904 there was much less than was observed the previous season. The 

 meteorological data show that the rainfall from April to August in 1904 was only 

 about one-third of the amount recorded in the previous year. The results of the 

 observations are tabulated, from which it appears that the hybrid perpetua 

 class are more subject to attacks of P. subcorticium than any of the Others Btudied. 



A competitive test of spraying apparattis, J. Km/km \ Bos I Tijdschr. Planten- 

 eiekten, n \ 1905), pp. 81-96, pis. 2, figs. 8).— A report is given of the jury designated 

 to award the prizes of the Penological Society of Holland for hand, knapsack, and 

 power sprayers. The jury in making it- award took into consideration the >iz«-. 

 weight, apparent durability, cost, relative efficiency, fineness of spray, eta First 

 and second prizes and honorable mention were awarded in each class. 



