552 EXPERIMENT STATION EECORD. [Vol.38 



colorations surroiindiug the lenticels, which elongate with age and become some- 

 what sunken and darker in color). The disease appears almost identical with 

 the bacterial disease of peach and plum ascribed to Fseudohionns {Bacterium) 

 pruni but not known to have been found previously on the cherry, of which 

 only the Wragg variety appears to be affected. 



Spraying experiments with self-boiled lime-sulphur reduced the fruit injury 

 from 41.4 to 10.2 per cent. 



Abnormal blossoms on black currant, R. G. Hatton and J. Amos (Gard. 

 Chron., 3. set:, 61 {1917), No. 15S/,, p. 180, figs. 3).— Black currant bushes at 

 the Wye Station under observation for two seasons have shown, in a bush 

 that was conspicuously nettle headed, a further abnormality in which the fruit- 

 ing spurs of the abnormal inflorescence consisted of one or more single blos- 

 soms, each on a short pedicel, together with several racemes, the abnormal 

 condition of the blossoms differing in the two instances as described. Both 

 types of abnormal blossom appeared on each spur and were fairly frequent 

 over the whole bush, which showed no normal flowers and set no fruit. The 

 observations are to be continued. 



A new disease of grapevines, Acarinosis in Navarra, A. Azanza {Prog. 

 Agr. y Pecnario, 23 {1917), Nos. 999, pp. 64, 65; 1001, pp. 89-91; 1007, pp. 158- 

 160; 1012, pp. 221-223; lOl/f, pp. 2 45-2. ',7). —This is a discussion of the anomaly 

 of grapevine said to be known universally in France as court none, of the work 

 and the views of various investigators thereon, of the damage suffered in con- 

 nection with this condition of grapevines, of more or less similar conditions as 

 variously reported, of somewhat inconclusive experimentation testing for 

 transmissibility of this condition, of the organisms found in connection there- 

 with, of the probability of a connection between court noiie and the occurrence 

 of acarids on the vines, of the conditions apparently related to the occurrence 

 of the ti'ouble (weather, soils, and age of the vines), and of remedial measures. 



Prevention of mildew outbreak, J. Casc6n {Prob. Agr. y Pecnario, 23 {1917), 

 No. 999, pp. 70, 71). — This is a discussion of the preparation and use of Bor- 

 deaux mixture or of copper acetate for grape downy mildew. The period 

 between the swelling of the buds and the opening of the blooms is considered 

 a time of great danger to the plant on account of the rapid growth and expo- 

 sure of susceptible surfaces to the infection. 



Control measures against grape downy mildew, V. C. Manso de ZtJNiGA 

 {Prog. Agr. y Pecnario, 23 {1917), No. 1009, pp. 182-184) .—This contains refer- 

 ence to results of work in 1915 as bearing upon the problems of the current 

 year, and more particularly as showing the efficacy of copper sprays, when 

 properly made and used, against grape downy mildew. 



Copper sulphate and copper sprays, V. C. Manso de ZtJNiGA {Prog. Agr. y 

 Pecnario, 23 {1917), No. 1007, p. 163).— As the result of tests at the Haro sta- 

 tion, it has been found possible to reduce the copper sulphate in the sprays 

 employed against grape downy mildew to 0.5 per cent by employing casein. 

 The reduction of the co])per content to 0.25 per cent has not proved successful. 



Treatment of grape downy mildew and Oidium, V. C. Manso de ZtJNiGA 

 {Estac. Enol. Haro Mem., 1916, pp. 40-47).— Ks the result of tests with fungi- 

 cides for use against grape Oidium and downy mildew, it is stated that 

 Bordeaux mixture with casein proved to be as effective at 1 per cent strength 

 as without casein at 2 per cent. A preparation of very high basicity produced 

 serious injury in all tests. 



A bacterial spot of citrus, Ethel M. Doidge {Ann. Appl. Biol., 3 {1917), No. 

 2-3, pp. 53-81, pis. 11). — An tyccount is given of a citrus disease in the western 

 part of the Capo of Good Hope. The primarily causal organism is described as 

 a new species {Bacillus citrimaculans). It is symptomatically diaracterized 



