60 PATHOLOGY [Bot. Absts. 



409. McCubbin, W. A. Investigation in the Canadian Department of Agriculture. Rept. 

 White Pine Blister Rust Control, Amer. Plant Pest Committee Bull. 2: 13-14. 1919.— Sun- 

 light filtered through glass to remove its ultra-violet content did not materially affect germi- 

 nation of spores of Cronartium ribicola even after five hours exposure. Both aeciospores and 

 urediniospores readily fall victims to ultra-violet radiations, however, at an exposure of 2.5 

 minutes to the radiations from a source whose ultra-violet energy may be represented by 0.38. 

 In 22 woodlots in Niagara district blister rust was present in 19. An average of 2.3 per cent 

 of the trees were found infected; the highest percentage infection was 33.54 in one woodlot. 

 In 10 plantations at Oakville where disease has been present since 1915, one pine out of 2249 

 was found diseased. In Simcoe county where the fungus has existed since 1912 no diseased 

 pine could be found in three plantations of 600 trees. Author believes that about 1 per cent 

 of s the pines under conditions favorable to infection, will become infected each year. — W. H. 

 Rankin. 



410. Mestrezat, W., and Th. Casalis. Proprietes antiseptiques et mode d' emploi du 

 monochlorure d'iode. [The antiseptic properties and the method of use of monochloride of 

 iodine.] Compt. Rend. Soc. Biol. Paris 81: 1196-1199. 1918.— Solutions of iodine chloride 

 possess a high antiseptic property and are harmless to the tissues. The solution is used in a 

 concentration of 0.3 gram per liter. [Through absts. by G. H. Smith] in Abst. Bact. 2, 

 Entries 1952 and 1953.]— D. Reddick. 



411. Metcalf, Ha vex. Summary of the white pine blister rust situation. Rept. White 

 Pine Blister Rust Control, Amer. Plant Pest Committee Bull. 2: 16. 1919. — The cost of 

 removing wild currants and gooseberries is low and will not compare with the cost of the 

 damage if the bushes are permitted to remain and spread infection to the pines. Resump- 

 tion of planting white pine in East is warranted. Ribes must be eradicated from the planting 

 area and the plantation kept free of Ribes during subsequent years. The wisdom of state 

 and national quarantines confirmed by the demonstrated fact of the over-wintering of the 

 fungus on Ribes. These state and national quarantines must continue to be rigidly enforced 

 for an indefinite period. — W. H. Rankin. 



412. Monziols, M. Procede de disinfection absolue des mains en trois minutes par une 

 pate a base de chlorure de chaux. [Method of securing an absolute disinfection of the hands 

 in three minutes by the use of a paste of calcium chlorite.] Compt. Rend. Soc. Biol. Paris 

 81: 600-602. 1918.— The formula for the paste is: 



grams 



Calcium chloride 2 



Sodium carbonate 2 



Boric acid 10 



Talc 10 



—[Abst. by G. H. S[mith] in Absts. Bact. 2, Entry 1918.] 



413. Nortox, J. B. Washington asparagus: information and suggestions for growers of 

 new pedigreed rust-resistant strains. U. S. Dept. Agric, Office Cotton, Truck and Forage 

 Crop Diseases, Circ. 7. P. 8. Washington [D. C], 1919. 



414. Paravicini, E. Favolus europaeus Fr. Ein Schadling des Nussbaumes. [An 

 enemy of the nut trees.] Schweiz. Zeitschr. Forstwesen 70: 15-17. 1919.— Since the culture 

 of nut trees has assumed commercial importance in Switzerland, the enemies of the nut tree 

 must be controlled. Juglans regia L. is subject to attack by the following fungi: Polyporus 

 sulfureus, P. imbricatus, P. squabnosus, P. cinnabarinus, P. jomentarius, P. ignarius, P. 

 hispidus, Daedalea cinnabarina, Agaricus ostrealus, and Favolus europaeus. — Favolus euro- 

 paeus has been found to be the most virulent. This fungus has been found in various parts 

 of Switzerland, which indicates that it may become a serious factor. — The method of infec- 

 tion has not been experimentally determined, but it is known that the fungus enters through 

 wounds in the branches. — The only method of control known is to remove all diseased branches 

 and cover the wound with grafting wax. — J. V. Hofmann. 



