950 EXPERIMENT STATION RECORD. 



As int'cantionary and preventive measures the author recommends the col- 

 lection and burning of leaves, dried j^rapes, etc.; the ai»]ilication of strong 

 solutions of fungicides to the canes about 2 weeks before pruning; the reduction 

 (if humidity where jHissible; the avoidance of nitrogenous fertilizers: thinning 

 of the grapes: and the use of liquid fungicides which are as adherent as pos- 

 sible and of powdered fungicides containing soluble copper and other materials 

 which are readily decomposed. Among tlie solutions the best results were 

 obtained with Bordeaux mixture containing gelatin or sugar, copper acetate 

 solutions, and a solution of sulphate of nickel. Among the powders a mixture 

 of copper a-cetate or copper sulphate and bisulphite of soda has given the best 

 results. 



A bibliography is aiJpentled. 



The white rot of grapes, (i. Istvanffi (Ann. Sci. Agron., 3. ser., 3 (1908), II, 

 No. 2, in). IS.J-UKj). — An account is given of the author's investigatons on the 

 white rot of grapes due to Cfniiothyrium iJipJodiella, together with means for its 

 control, based upon an extensive study of this subject, which has been previously 

 noted (E. S. R., ]5, p. 164). Some additional information lias been gained re- 

 garding the disease and especially concerning its control. Spraying with a 

 8 or 4 per cent Bordeaux mixture and later dusting with a powder containing 

 some form of copper and bisulphite of soda is recommended for application to 

 the young shoots and the grapes. All diseased leaves, shoot.s, and grapes should 

 be collected and burned as completely as possible. The application of the fungi- 

 cides to the grape clusters should be begun immediately after flowering. 



A brief bibiidgi'iiiiliy is appended. 



Lathraea squamaria as a parasite of the grape, H. Faes (Rev. Vit., 30 

 (190S), Xo. 783, p. 100). — In a brief note the author calls attention to the appear- 

 ance of L. squamaria on the roots of grapes, previous investigators having con- 

 sidered it of rare occurrence. In one locality the vines are said to have suffered 

 severely. As the upper part of the i>arasite annually dies to the ground, the 

 injury has generally been attributed to phylloxera, but the author thinks that, . 

 at least in the instances described by him, the principal cau.se of injury is this 

 phanerogamic pa i-a site. 



Apple scab or black spot, E. S. Salmon (Jour. Bd. Agr. [London], 15 (1908), 

 Xo. 3, pp. 182-19,5, figs. 0). — An account is given of the scab or black spot of the 

 apple, due to Venturia pomi, a disease which is said to be causing considerable 

 damage in the orchards of England. Attention is called to the vai-ying suscep- 

 tibility of diffei'ent varieties to attacks of this fungus. 



For the prevention of the disease, thorough spraying with a Bordeaux mix- 

 ture composed of copper sulphate 4 lbs., lime 4 lbs., and water 50 gal. is recom- 

 mended. Where the disease appears late in the season, to avoid the discoloring 

 due to Bordeaux mixture, ammoniacal copper carbonate solution is recommended. 

 As additional treatment, the author suggests a winter washing of tlie trees 

 with a rather strong coi)per sulphate solution. 



Review of information relating to olive diseases, Cuboni (Ann. Agr. [Italy], 

 1908, No. 236, pp. S.i-91). — In the repoi't of the consulting connnission on olive 

 culture and oil making, an account Is given of the diseases to which the olive 

 tree is subject, particular attention being paid to those due to the fungi CycJo- 

 coninin olcagiiium, Capiiiidiuin saliciuuin. and i^tictis panizzci, and suggestions 

 are given for their control, as far as definite means are known. 



[Spraying peaches and plums], O. M. Morris (Oldalioinu 8ta. Rpt. 1908, pp. 

 16, 17). — ^A brief account is given of spraying peaches and plums with half- 

 strength Bordeaux mixture for the purpose of protecting them from the attacks 

 of brown rot. Four applications of the fungicide were given the trees, which 



