1917] ECONOMIC ZOOLOGY ENTOMOLOGY. 155 



This keeps the fruit clean and free from bluish spots, although if used several 

 times it spots the fruits at points where they are in contact. Cutting back 

 must be careful and destruction of diseased parts must be thorough in order 

 to avoid the saprophytic preservation of the fungus. The fruit must be care- 

 fully handled in order to avoid injury. 



[Notes on some pineapple diseases], M. O. Johnson {Hawaii Sta. Rpt. 1916, 

 pp. 23, 2/t).^A brief account is given of an investigation of a serious disease 

 of pineapples known as the Kauai wilt. This is rather definitely associated 

 with a certain type of soil, and it is thought, from a lack of lime in the ash 

 of diseased plants, that the trouble may be in some way connected with soil 

 acidity. Pot and field experiments have been begun to determine the effect of 

 liming on this wilt. 



A brief account is also given of the yellowing of pineapples on manganese 

 soil, a more detailed report of which has been noted (E. S. R., 36, p. 850). 



Rusts of cultivated trees and their treatment with lime-sulphur, L. Sava- 

 STANO (R. Staz. Sper. Agrum. e Frutticol. Acirealc, Bol. 25 (I'JIG), pp. 10). — 

 This bulletin gives a r6sum6 of some results of observation and experimentation 

 during 1912 to 1916, in connection with rusts of cultivated trees, including 

 their characters, causal organisms, favoring conditions, spread, and treatments. 



Carnation leaf spot in Italy, M. Turconi {Riv. Patol. Veg., 8 (1916), No. 1, 

 pp. 1-4). — A carnation disease was observed in Italy in 1915, due to a fungus, 

 which, from the morphological characters of its mycelium and fructifications, 

 appeai'ed to be Alternaria diantfii. 



Sweet pea diseases and their control, J. J. Taubenhaus {Trans. Mass. Eort. 

 Soc, 1916, pt. 1, pp. ISl-lJfS). — The author discusses the results of investiga- 

 tions dealing with root rot {Corticum vagum) of the sweet pea, Fu.sarium wilt 

 {F. lathyri), stem or collar rot {Sclerotinia Wbertiana), Thielavia root rot 

 {T. hasicola), root knot or nematode disease {Hetcrodera radicicola), mosaic 

 (unknown as to causation), powdery mildew (Microsphcra aini), authracnose 

 {Glomerella rufomaculans) , streak {Bacillus lathyri), physiological troubles 

 ascribed mainly to soil conditions, certain insects which wound or weaken the 

 plants or carry spores, bringing about infection, and control methods. 



Oak mildew, T. A. C. Schoevers {Tijdschr. Plant enziekten, 22 {1916), No. 

 2-4, pp. 84-93). — This is chiefly a discussion of contributions, more particularly 

 that of Neger (E. S. R., 33, p. 745), on the classification and host relationships 

 of the fungus causing oak mildew. This organism is considered distinct from 

 that causing gooseberry mildew. 



White pine blister rust, J. S. Duff {Rpt. Min. Agr. Ontario, 1915, p. 22). — 

 It is stated that early in 1915 an outbreak of white pine blister rust was re- 

 ported to the department and, as a result, the importation of five-leaved pines 

 into Canada from Europe and the sale of such pines was for the present pro- 

 hibited. A survey gave evidences of the disease in the counties of Brant, 

 Durham, Halton, Kent, Lincoln, Wellington, and Wentworth. 



ECONOMIC ZOOLOGY— ENTOMOLOGY. 



Animal micrology, M. F. Guyer {Chicago: Univ. of Chicago Press, 1911, 

 rev. ed., pp. XI +289, figs. 7-}). — This consists of practical exercises in zoological 

 microtechnique. 



Notes on some animal parasites in British Guiana, G. E. Bodkin and L. D. 

 Cleaee, jr. {Bvl. Ent. Research, 7 {1916), No. 2, pp. 179-190, pi. 1 figs. S). — 

 Notes are given on the more important animal parasites occurring in British 

 Guiana. 



105033°— No. 2—17 5 



