DISEASES OF PLANTS. 551 



of curing, with proposed preventives or remedies; the other takes up animal 

 pests of tobacco. 



The fire blight disease and its control in nursery stock, V. B. Stewabt 

 (New York Cornell Sta. Giro. 20, pp. 85-9/t, figs. 4). — The author describes fire 

 blight, which attacks many species of plants belonging to the section Pomeae, 

 and gives suggestions for the control of the disease in nursery stock. 



In large nurseries it is recommended that the hold-over blight and sources of 

 infection should be eradicated in the early spring before growth starts. Blos- 

 som buds, especially those on quince stock, should be removed. Frequent 

 inspections of the diseased area should be made and all infections cut out and 

 burned. Spreading of the disease in seedling blocks should be avoided as much 

 as possible. 



Treatment of fruit trees with lime-sulphur wash, E. Marre (Prog. Agr. et 

 Vit. [Ed. VEst-Centre], 34 (1913), No. 17, pp. 529-532).— It is claimed that a 

 mixture of 3 kg. of powdered sulphur, 2 kg. of quicklime, and 100 liters of 

 water, prepared according to directions given, is adherent and effective against 

 rust of peaches and some other diseases of fruit trees. 



Concerning' court-noue, G. Chappaz (Prog. Agr. et Vit. (Ed. VEst-Centre), 

 34 (1913). No. 18, pp. 55/f-557). — The author regnrds those cases of court-nou6 

 due to cold as accidental in a sense and self -remedial. He agi-ees with Trabut 

 (E. S. R., 28, p. 650) that the persistent form observed in warmer climates is 

 due to a form of gummosis. 



On court-noue, L. Ravaz (Prog. Agr. et Vit. (Ed. VEst-Centre), 3/f (1913), 

 No. 20, pp. 616-624). — This is a brief historical and descriptive report, made to 

 the Society of Viticulturists of France, on court-noue under several names and 

 in different forms and degrees exhibited in various geographical regions, includ- 

 ing also its conditions of development, possible causes, and treatment. 



The combat against grape mildew, A. Cadoret (Prog. Agr. et Vit. (Ed. 

 VEst-Centre), 34 (1913), No. 18, pp. 5.57-559).— The author claims that his 

 observations, previously noted (E. S. R., 24, p. 50), have been confirmed in that 

 the years of most serious outbreak of grape mildew prove to be those in which 

 a cool spring is followed by a hot summer with much cloudy damp weather, 

 the sycamores showing severe attack by Oloeosporium nervisequum about 10 to 

 15 days previous to the attack of mildew on the vines. It is claimed that an 

 early attack (in May) on the sycamores should be the signal for thorough spray- 

 ing of the vines with Bordeaux mixture or copper acetate, preferably twice at 

 intervals of about 15 days. For attacks in June, a combined treatment is recom- 

 mended, consisting of the above sprayings, followed by a powder composed of 

 bolted lime, sulphur, and copper sulphate in the proportions 60 : 30 : 10, respec- 

 tively, or of lime, sulphur, and copper acetate in the proportions 60 : 33 : 7. 



The presence of endocellular fibers in healthy vines and in those affected 

 with roncet, Eva Mameli (Atti R. Accad. Lincei, Rend. CI. Set. Fi^s., Mat. e 

 Nat., 5. ser., 22 (1913), I, No. 12, pp. 879-883) .-Thi^ author claims, as the result 

 of studies on 13 varieties of grapes, to have shown that the presence of the 

 endocellular fibers, held by Petri (E. S. R., 28, p. 550; 29, p. 349) to be a con- 

 stant feature of roncet, does not constitute an index of the presence of this dis- 

 order, these being found in various parts of normal vines, both native and 

 foreign. 



Scorching of grapes, L. Ravaz (Prog. Agr. et Vit. [Ed. VEst-Centre], 34 

 (1913), No. 28, pp. 33-35, pi. 1). — ^A brief illustrated account is given of the 

 detrimental effect of direct sunlight upon grapes, extending only to the fruit, 

 stems, and leaves; also a discussion of contributing factors and possible 

 remedies. 



