746 EXPERIMENT STATION KECOED. 



26, p. 645) tlie author called attention to what he called plus and minus strains 

 of this fungus. These strains have been carried over for three years and are 

 said to be still producing perithecia abundantly. That fertilization has taken 

 place between the two strains has been proved by isolating single asci from 

 the boundary line between the two strains and allowing them to grow into 

 colonies. These colonies usually produce both strains. 



Root knot, gall worms, and eelwonns, C. Fuller {Agr. Jour. Union So. 

 Africa, 6 {1913), Nos. 3, pp. UO-W, figs. 4; 5, pp. 792-S02, figs. (5).— This is a 

 brief and somewhat general account of the life history and habits of several 

 nematodes attacking economic plants, chiefly in South xVfrica. Recommenda- 

 tions looking to the control of these pests emphasizes efforts to develop nonsus- 

 ceptible strains from plants found to be already measurably resistant. 



Root knot— cause and control, L. Childs {Mo. Bui. Com. Hort. Gal., 2 {1913), 

 No. 12, pp. 737-756, figs. 8).— This is a somewhat general account of the dis- 

 tribution, life history, and work of Heterodera radicicola, giving a list of 

 nearly 500 plant hosts of this nematode and discussing means of control, which 

 include appropriate fertilization, cultivation, starvation, drought, flooding, 

 carbon bisulphid, formaldehyde, and steam. 



Nematodes attacking wood rushes in Silesia, O. Oberstein {Ztschr. Pflan- 

 zenkranh., 23 {1913), No. 5, pp. 262-264, figs. 2; ahs. in Internat, Inst. Agr. 

 [Rome], Mo. Bui. Agr. Intel, and Plant Diseases, 4 {1913), No. 10, p. 1662). — 

 The author notes the discovery by A. Lingelsheim, in the spring of 1913, of 

 Heterodera radicicola in nodules found on roots of Scirpns sylvaticus in the 

 Botanical Gardens at Breslau. 



[Report on plant diseases], M. T. Cook {Ann. Rpt. N. J. Bd. Agr., 40 {1912), 

 pp. 236-240). — This report deals briefly with some diseases noted in connection 

 with vegetables, fruits, berries, ornamental trees, and flowers ; and at somewhat 

 greater length with the blister rust of white pine {Peridermium stroU) and the 

 chestnut bark disease, listing several publications on plant diseases issued in 

 1912. 



Plant diseases and pests, G. Auchinleck {Imp. Dept. Agr. West Indies, 

 Rpts. Bot. Sta. [etc.] Ghrenada, 1912-13, pp. 8, 9). — Giving a brief account of 

 insects affecting economic plants in Grenada during the past 3 years, and noting 

 that the fungus Sph{?erostilbe decreased greatly black blight of citrus trees 

 due to scale insects in 1913, the author mentions also some sporadic cases of a 

 disease of coconut, suspected to be bud rot, as observed during the past year. 



Cryptogamic diseases in Hung-ary, B. Pater {Ztschr. Pfianzenkrank., 23 

 {1913), No. 5, pp. 260-262; ahs. in Intcrnat. Inst. Agr. [Romel, Mo. Bui. Agr. 

 Intel, and Plant Diseases, 4 {1913), No. 10, pp. 1656, 1657).— The author notes 

 briefly the appearance and relative activity in Hungary of the following organ- 

 isms in 1912: Puccinia graminis, on rye, P. malvacearum on Althea opciyialis, 

 P. iullata on Conium maculatum, P. menthw on Mentha canadensis piperascens, 

 Epichloe typhina on Agropyrum repens, Plasmopara nivea on G. maculatum, 

 Phoma fwniciilina on fennel, and O'idium querciniim on oaks since 1910. old 

 trees appearing to be immune. 



Parasitic fung-i observed in the vincinity of Turin in 1911, P. Voglino 

 {Ann. R. Accad. Agr. Torino, 55 {1912), pp. 199-227). — Notes are given of a 

 large number of fungi found parasitic on various plants and the following new 

 species are described: SpJueronwma parasiticum on the leaves of Gratwgus 

 glabra, Goniothyrium opuntiw on Opuntia ficus indica, and Ascochyta laricina 

 on larch seedlings. 



Mycological notes, B. G. C. Bolland {Agr. Jour. Egypt, 3 {1913), No. 1, 

 pp. 28-30, pi. 1). — The author gives brief descriptions of some plant diseases as 

 noted in Egypt. Withertip of citrus fruits, particularly common on orange 



