452 EXPEEIMENT STATION RECORD. 



Gooseberry aud red-currant bushes, as well as sycamoi-e sprouts, have been 

 found silvered. In the case of tlie sycamore, 8. purpureum was found abun- 

 dantly on the stump from which the affected shoots arose. 



Crown gall, G. Massee {Roy. Bot. Oard. Kew, Bui. Misc. Inform., 1910, 

 No. 9, pp. 309-312, pi. 1; Jour. Bd. Agr. [London], 11 (1910), No. 8, pp. 617-620, 

 pi. 1). — Attention is called to the presence of crown gall on plums, roses, rasp- 

 berries, and chrysanthemums in various sections of England. The disease seems 

 to be caused by Dendrophagus globosus alone, as no traces of Bacterium tume- 

 faciens have yet been found in the diseased tissues. 



New experiments on the control of the American gooseberry mildew, 

 Wagnee (Laiidic. Ztschr. Rlieinprorinz; 11 {1910), No. 35, pp. 527, 52S).— The 

 tests were made under the direction of the Chamber of Agriculture of the Rhine 

 Province at Alfter, near Bonn, aud consisted of experiments with 50 per cent 

 lime-suIphur mixtures, 5 per cent solutions of cucasa, and 10 per cent solutions 

 of carbolineum. 



It was found that one treatment with any of these sprays proved unsatis- 

 factory in controlling the mildew. It is stated that the most satisfactory 

 method so far known of combating the disease is a careful cutting back during 

 the winter months of all plants infected with the mildew. 



The treatment of the mildew in 1910, R. Brunet {Rev. Vit., 34 {1910), 

 No. 879, pp. i21--'i56, figs. 3). — After giving the answers received to an inquiry 

 sent to various vineyardists throughout France concerning the methods used 

 and results obtained in combating the mildew, the author claims from the evi- 

 dence presented that alternately spraying with Bordeaux mixture aud dusting 

 the vines and fruit with sulphur powders to which has been added 5 to 10 

 per cent of copper sulphate, proved to be a most efficient preventative of the 

 mildew during this season. 



The use of salts of silver in place of copper salts proved valueless in com- 

 bating the mildew. 



The breeding of grape hybrids resistant to Peronospora, G. Serlupi 

 {Rivista [Concgliano], J,, scr.. 16 {1910), No. 22, pp. 511-518).— The general 

 qualities and characteristics of about 24 hybrids bred with special reference to 

 their resistance to Peronospora are described. Some of these hybrids seem to 

 be very immune to the disease. 



Studies on the Roesleria of the grape, P. Viala and P. Pacottet {Ann. 

 Inst. Nat. Agron., 2. ser., 9 {1910), No. 2, pp. 2.'fl-252, figs. 12; Rev. Vit., 34 

 {1910), Nos. 875, pp. 320-323, figs. 2; 876, pp. 350-35-',, figs. 8; 877, pp. 379- 

 382, figs. 3; 880, pp. 466-471, figs. 8; 883, pp. 550-557, figs. 9).— The authors re- 

 port the results of investigations on the life history of this fungus, including 

 a discussion of its probable parasitism and studies on its mycelium, fruiting 

 stages, isolation in culture media, conidiopbore formation on the roots of grape- 

 vines and in cultures, and the production of chlamydosporic fructifications in 

 liquid culture media. 



Pecan scab, M. B. Waite {Science, n. ser., 33 {1911), No. 837, pp. 77, 78). — 

 In a paper read before the December meeting of the Botanical Society of Wash- 

 ington, the author discussed the characteristics of a scab fungus {Fasicladium 

 effusum) of the pecan, which is especially injurious to certain varieties, such 

 as the San Saba and Sovereign, when carried from their native habitat in the 

 dry regions of western Texas to the humid conditions of the Gulf Coast States 

 and the Carolina s. 



The fungus attacks the young leaves as they unfold, the young growing 

 twigs, and especially the nuts, causing a partial or total destruction of the 

 crop. As the nuts continue to develop during the summer, every warm, rainy, 



