380 PATHOLOGY [Bot. Absts. 



— Probability of infection increases as fruits approach maturity "and several varieties of 

 peaches and nectarines suffer attack almost entirely during that period" but "considerable 

 number of the best varieties are affected at the rate of 40 per cent when quite green — chiefly 

 just after stoning." — D. Reddick. 



2604. Coons, G. H. Michigan experiments on bean disease control. Michigan Agric. 

 Exp. Sta. Quart. Bull. 1: 104-106. 4 fig- Feb., 1919. — A popular account of anthracnose 

 and bacterial blight of beans with recommendations as to mode of control. — E. A. Bessey. 



2605. Coons, G. H. Bordeaux mixture. Michigan Agric. Exp. Sta. Quart. Bull. 2: 18- 

 19. 6 fig. Aug., 1919. 



2606. Coons, G. H. Botanical notes. Michigan Agric. Exp. Sta. Quart. Bull. 1 : 159-162. 

 May, 1919. — Brief notes on the following topics: Barley disease situation, potato spraying, 

 seed-treatment of potatoes, and damping-off of seedlings, with recommendations for treat- 

 ments in all cases. [See next following Entry, 2607.] — E. A. Bessey. 



2607. Coons, G. H. Botanical notes. Michigan Agric. Exp. Sta. Quart. Bull. 2: 14-17. 

 Fig. 8—5. Aug. 1919. — Warning notes on take-all and flag smut of wheat and wart disease of 

 potato, and recommendations to urge spraying for apple scab and the Septoria blight of to- 

 mato. [See next preceding Entry, 2606.] — E. A. Bessey. 



2608. Cordley, A. B. Possible cause of "Sour Sap" in the Pacific Northwest. Better 

 Fruit 13 u : 6, 30-32. May, 1919.— See Bot. Absts. 3, Entry 2325. 



2609. Cossette, J. R. Two years of success with dusting. Agric. Gaz. Canada 6: 168- 

 169. 1919. — A report of the Oka Agricultural Institute, Quebec. — O. W. Dynes. 



2610. Cotte, J. Sur divers parasites des platanes a Nice en 1918. [On various parasites 

 of sycamore (Platanus sp.) at Nice in 1918.] Bull. Soc. Path. Veg. France 6: 65-67. May- 

 June, 1919. — Besides insects, anthracnose caused by Gloeosporium nervisequum and a hyper- 

 trophy near the base of the trunk regarded as probably due to a parasite, are described. — 

 C. L. Shear. 



2611. Cotton, A. D. Onion smut: a disease new to Britain. Jour. Bd. Agric. [Great 

 Britain] 26: 168-174. 1 fig. 1919.— The disease (Urocystis cepulae) was first called to the 

 attention of the Board of Agriculture by a grower in 1918, who had also observed the disease 

 in 1917. Upon extended inquiry two former authentic collections were found — one on young 

 leeks and onions near Edinburgh in 1912, and the other on leeks in Northumberland in 1914. 

 In 1918 smut occurred on onions in a number of gardens in that locality. In no case was 

 the original source of the disease determined. — A brief description of the disease is given 

 together with suggestions for its control. — M. B. McKay. 



2612. Cromwell, R. O. A bad outbreak of cedar apple rust. Rept. Iowa State Hortic. 

 Soc. 53: 127-131. 1918. — A brief discussion of the relation of apple rust (Gymnosporangium) 

 to cedar. Calls attention to the severity of the fungus on the Wealthy and in a less degree on 

 Ben Davis and Jonathan varieties. — L. H. Pammel. 



2613. Daniel, Lucien. La maladie du chene, ses causes et son remede. [Oak disease, 

 its cause and its control.] Trav. et Notices Acad. Agric. France 1: 421^40. 1918. — Oak 

 mildew (le blanc) is abundant and destructive because of practices which have reduced the 

 vitality of the trees. Particular objection is made to the practice of decapitating trees in 

 order to force lateral branches which are used for firewood. — D. Reddick. 



2614. Darnell-Smith. (I. P. Experiments on the control of brown rot in stone fruits. 

 Agric. Gaz. New South Wales 29: 663-664. 1918. — Cotton wool was saturated with formalde- 

 hyde and with sulfur dioxide and placed in perforated boxes inside packing cases of peaches 



