842 EXPERIMENT STATION" RECORD. [Vol.41 



Fungus diseases are said to be found on practically all cultivated and wild 

 plants in the Laguna Provinces, and they are thought to be numerous in other 

 agricultural regions in the Islands. The great factors in the spread and de- 

 structiveness of fungi are lack of proper culture, of sanitation, of pruning, and 

 of spraying, of which none is practically carried on in the Islands. While the 

 list of diseases is by no means complete, many are due to fungus species sup- 

 posedly new to science. 



Notes are given on means and measures recommended for control of certain 

 diseases. 



Porto Rican fungi, old and new, F. Jj. Stevens {Trans. III. Acad. Sci., 10 

 {1911), pp. 162-218, figs. 13). — This is a detailed and somewhat systematic ac- 

 count of numerous fungi in Porto Rico, some of the species being regarded as 

 new and some being appai'ently of economic interest. 



Some new Porto Rican fungi, L. E. Miles {Trans. III. Acad. Sci., 10 {1911), 

 2)p. 249-255, figs. 3).— The species herein noted as collected in 1912-13, and 

 since that time determined by persons named, are listed in connection with the 

 hosts in relation with which they live as saprophytes or parasites, some of the 

 fungi being possibly of economic importance. 



The rusts of the Douglas Lake region, L. Bonar {Ann. Rpt. Mich. Acad. 

 Sci., 20 {1918), pp. 277, 278). — A list of 40 rusts with their hosts is given as 

 collected in the summer of 1917 within 4 or 5 miles of the University of Mich- 

 igan Biological Station. 



Notes on Cephaleuros virescens, II. Higley (Trans. III. Acad. Sci., 10 {1917), 

 pp. 256-258). — This paper deals with gross details of C. virescens, which ap- 

 pears on 10 different hosts. Superficial characters make it possible, it is said, 

 to divide the species into four distinct groups. The differences observed are 

 supposed to be due to the resisting power of the several hosts. 



Physiological characters as a means of distinguishing between the species 

 of Penicillium, W. AVoltje {Centbl. Bald, [efc.^, 2. AM., 7/8 (1918), A'o. 5-9, pp. 

 97-130, figs. 5).— This is a detailed account of study, with tabulation, of several 

 species of Penicillium as regards physiological reaction to media of different 

 characters, both physical and chemical. 



Lime-sulphur sprays, Y. Yeemorel and E. Dantony (Prog. Agr. et Vitic. 

 {Ed. VEst-Cenitrc), 40 {1919), No. 7, pp. 152-154).— In view of the multiplicity 

 of formulas for preparing lime-sulphur and the inconstancy and inconsistency 

 of their effects, and in particular of the in.iury sometimes resulting from their 

 use, experimentation has recently been carried out by the authors. The results 

 are briefly detailed as regards substances found to exist in the solution or in 

 the sediments in relation to temperature, time, pi'oportion, dilution, surface 

 exposure, and impurities. 



Stem rust of grains and the barberry in Wisconsin, A. G. .Johnson and 

 .1. G. Dickson {Wisconsin Sta. Bui. 304 {1919), pp. 16, figs. 15).— A popular 

 description is given of the various rusts which occur on cereals, special atten- 

 tion being given to the black stem rust of wheat and the relation of the common 

 barberry to its spread. 



Take-all, the wheat growers' worst enemy, .7. T. Pridham {Agr. Gaz. N. S. 

 Wales, 30 (1919), No. 2, pp. 77-79).— Observations during some years, and 

 systematic counts made recently of wheat plants affected in each of several 

 varieties named, show a .serious degree of infection of wheat at the Cowra and 

 other farms conducted by the Government. The results are serious in the ag- 

 gregate, whether the disea.se )>e due to Ophiobolus herpotrichus, Cladosporinm 

 herbarutn, Fusariiiin ruhiginosiun, or Mucor raceniosus, or to a combination of 

 these. Tabulated ligures for a considerable number of wheat varieties show in 

 each case the number of days required for the wheat to mature and the per- 



