152 EXPEKIMENT STATION EECORD. 



Plotcriffhtia agaves. A discussion follows of the characters, prevalence, and 

 damage done by fungi not bitlierto reported on these plants, these being 

 Thiclavia sp., Trichothccium roseum, Phytophthora agaves, and two Hymenomy- 

 cetes. One of these which seems to belong to the Thelephoracese causes seri- 

 ous losses to growers of the Tequila maguey by forming rosy-colored areas on 

 the bases of the leaves, which gradually invade the entire plant and kill it. 

 The other Hymenomycete is a species of Panus which attacks the bases of the 

 leaves of A. americana. 



The article concludes with suggestions for combating these fungi. 



A new disease of coffee, F. C. von Faber {Teysmannia, 21 (1910), No. 1, pp. 

 60-62). — The author calls attention to a new disease of coffee, which resembles 

 RostrcUu eoffew in its gross characteristics on the stems and branches of the 

 coffee plants. Cross sections of the diseased wood show, however, that the 

 fungus extends from the tops of the branches into the roots, forming dark 

 brown areas on the wood beneath the bark which as the disease progresses may 

 appear as brown or black spots on the bark of the affected trees. 



Cutting down the trees, as is done in combating the Rostrella fungus, will 

 not control this disease, because the roots are also invaded. The only safe 

 remedy is to dig up and burn the entire plant. 



Outbreaks of the oak mildews in Hungary, J. Roth (Natiinr. Ztschr. Forst 

 u. LaiuJn-.. 7 (1909). A o. ,s. pp. .'f26. '/27). — The prevalence and severity of this 

 disease during 1!X»S are noted for 4 provinces in Hungary. Attention is also 

 called to the fact that other plants besides oaks suffered from mildew attacks 

 that year, indicating that iniusually favorable conditions existed for the 

 propagation of mildews in general. 



The rusts of the pine and the parasitic occurrence of Cenangium. abietis, 

 E. ScHAFFNiT (Vortragc Pflanzenschutz, AM. Pflanzenkrank. Kaiser Wilhelms 

 Inst. Land IV. Bromherg. 1910, No. 1. pp. 69-79, figs. Jf). — After a brief notice of 

 parasitic fungi in general, the author discusses the characteristics, prevalence, 

 and hosts of 4 coniferous rusts, namely, Melampsora pinitorqua, Peridcnnium 

 pini, Cliii/sonijj.ra abietis, and C. ledi. 



Attention is also called to the occurrence in 1909 of Cenaiigiiini abietis as a 

 parasite on the Scotch pine, causing the death of shoots on trees 5 to 50 years 

 old. 



The leaf-fall diseases of the pines and their control, R. Schander ( Tortriige 

 Pflanzenschutz, Abt. Pflanzenkrank. Kaiser Wilhelms Inst. Landw. Bromberg, 

 1910, No. 1, pp. 33-.'t2, flgs. 10). — The author describes the characteristics of the 

 various fungi which cause the needles of pines and other conifers to fall pre- 

 maturely, and discusses the effects of Bordeaux mixture when used in combat- 

 ing them. The following species are claimed to produce this premature shed- 

 ding of the needles: Lophodermium pinastri, L. macrosporum, L. abietis, Uypo- 

 derma strobicola, H. laricis, and H. sulcigena. 



Corticium javanicum in Borneo {Agr. Bui. Straits and Fed. Malay States, 9 

 [1910), No. 2, pp. 59, 60). — This disease of rubber trees was especially severe 

 in 1909 during the monsoon period. 



The first appearance of the disease on the trunks of the Para rubber trees is 

 characterized by small drops of latex issuing as if from punctures in the bark. 

 Soon black patches appear which gradually increase in area. Beneath the 

 dead bark are found pads of foul smelling rubber. Then the pinkish fungus of 

 C. javanicum makes its appearance and completes the destruction of the trees. 

 On the branches, the disease appears as small raised spots of cork scattered 

 about, which eventually split and become small black sores. When these become 

 numerous, the whole of the cambium and all but the outer bark layer are dark 

 brown and rotten and the characteristic pink fungus appears. 



