368 EXPERIMENT STATION RECORD. 



should }»' carefully examined, the infected spots cut out, and the diseased material 

 burned. 



Cockscomb fasciation of pineapples, J. W. llAKSHBEKtiEK (Proc. Aatd. Nat. tSci. 

 Fhiliidelphiu, 1901, pji. 609-611, Jig. 1). — A remarkable case of fasciation of pineapple 

 is described in which several pineapples produced on a single plant were united into 

 a fan-like mass of considerable size. The monstrosity had a pleasant aroma, was suc- 

 culent, but very fibrous. 



A preliminary report on the nature of the banana disease prevalent at 

 Alexandria, Looss and G. P. Fo.vden {Jour. Roy. Ilort. Soc. \^Londori\, 26 {1902), 

 No. 4, pp. 844-848). — A description is given of a nematode disease of bananas which 

 has j)reviously been descrilied from another source (E. 8. R., 14, p. 264). 



How fungi gain entrance to living trees, J. W. Harshberger {Forest Leaves, 

 8 {1901), No. 6, pp. 88-91) . — A discussion is given of the means of infection of living 

 trees either by the natural growth of the fungus or through mechanical, meteorolog- 

 ical, or chemical injuries, as well as injuries produced by grafting and budding. 



Canker of oak trees, M. C. Potter ( Trans. Eng. ArboricuU. Soc. 1901-1902, p. 105, 

 figs. 4; ahs. in Bot. Centbl., 89 {1902), No. 16, p. 4«55).— Cankered oak trees, Quercus 

 robnr, are said to be common in the north of England. The canker begins at the 

 insertion of a dead branch, and passes thence to the living wood. The disease is 

 characterized l)y a brow'nish discoloration of the medullary rays. Spores sown upon 

 sterile oak blocks developed, producing mycelium, and finally the form l)y which 

 the affinities of the fungus was determined. It i)roved to l)e a new species of Stereum, 

 to which the name S. qaercinum is given. 



A bacterial blight of strawberry, A. B. Cordley ( Oregon Sta. Rpt. 1902, pp. 

 61-64) ■ — During the autumn of 1901 strawberry plants were noted that were appar- 

 enty suffering from bacterial disease. Many of the leaves were entirely dead, dark 

 brown in color, and leathery in texture. On other leaves the dead areas were observed 

 between the principal veins, and blackened and shrunken spots were also observed 

 on the stems. A careful microscopic examination of the diseased material failed to 

 show the presence of any fungus, but when examined bacteriologically it was found 

 to be infected with a Micrococcus. This was isolated and cultivated in a number of 

 media. Plants inoculated with pure cultures when placed under bell jars showed 

 the characteristics of the disease within 48 hours. In 1902 the disease reaj)peared, 

 and when examined the Micrococcus was found again present. The organism appar- 

 ently is distinctly aerobic, and whether the disease is to be considered a serious enemy 

 to strawljerry culture or only a sporadic attack can not be determined at present. 



Experiments for the prevention of mildew, L. Ravaz and A. Bonnet {Prog. 

 Agr. et Vit. { Ed. VE-^t), 23 {1902) , No. l.J, pp. 372-379).— A report is given in which 

 the efficiency of copper and cadmium salts, of different copper fungicides, and the 

 action of copper on the growth of a vine were studied. In experiments to compare 

 sulj^hate of copper and sulphate of cadmium, a simple solution of each salt was 

 tested, as well as a solution containing lime to which was added 0.5, 1, and 2 per cent 

 of the salts. These different solutions were applied to equal plats of grapevines upon 

 4 occasions, and the efficiency noted at the end of the season. Upon the 

 untreated plats the mildew proved quite destructive, but the different fungicides, 

 with the exception of the simple solution of copper sulphate, proved equally 

 efficient in preventing the attacks of the fungus. In the second series of experi- 

 ments reported, in which the efficiency and adhesiveness of fungicides were tested, 

 comparisons were made between Bordeaux mixture. Burgundy mixture, Bordeaux 

 mixture containing turpentine, and Bordeaux mixture to which resin was added, a 

 verdigris solution, and a simple solution of copper sulphate. All of these fungicides 

 were sprayed over grapes, 3 applications being given, the first upon May 14. An 

 examination was made of the foliage on October 30 and but little difference was 

 noted in the adhesiveness of the different fungicides, except the simple solution of 



