50 EXPERIMENT STATIOIST EECORD. 



A tentative plan for spraying for tlie prevention of the rust is proposed, in 

 which applications of fungicides are to be made (1) just after the leaves emerge 

 from the bud, (2) just before the blossoms open, (3) just after the petals fall, 

 and (4) 10 days later. Only decidedly susceptible varieties need be treated for 

 protection. 



Rust of pear trees, A. Osterwalder (Schweiz. Ztschr. Obst u. Weinhau, 

 1912, p. Sll; ahs. in Ztschr. Landw. Versuchsw. Osterr., 15 {1912), No. 12, p. 

 1S03). — As a means of controlling this disease, the author emphasizes the de- 

 struction of the neighboring junipers, which are said to be indispensable to the 

 complete development of the fungus. 



The Monilia disease of quinces (Monilia linhartiana), Piepee (Ztschr: Ohst 

 u. Gartenbau. 1912, p. 81 ; ahs. in Ztschr. Landw. Vcrsu^chsiv. Osterr., 15 {1912), 

 No. 12, p. 1305). — This is a report on an attack by M. linhartiana on quinces in 

 Lossnltz. The use of sulphur as a fungicide is recommended. 



Rusts of blackberries, dewberries, and raspberries, G. W. Wilson {North 

 Carolina Sta. Rpt. 1912, pp. 56-61, flgs. 4). — The author gives descriptions of the 

 orange rust {Gymnoconia interstitialis) , late rust {Kuehneola alhida), and cane 

 rust {Vredo niuellerii), with suggestions for their control, so far as definite 

 means are known. 



Observations on control of American g'ooseberry mildew, Biermann 

 (Geisenh. Mitt. Obst u. Gartenbau, 1912, p. 60; abs. in Ztschr. Landw. Ver- 

 suchsw. Osterr., 15 {1912), No. 12, p. 1306). — It is stated in a report on the 

 appearance of American gooseberry mildew in the district of St. Goarshausen 

 that the American gooseberry proved fully resistant to this disease. Prescribed 

 measures for protection included destruction of all affected parts, deep turning 

 of the soil, and avoidance of infected stock. 



The control of downy mildew in 1912, L. Sauret {Prog. Agr. et Vit. {Ed. 

 VEst-Ccntre), 31, {1913), No. 8, pp. 231-231).— T^q author reports the success- 

 ful treatment of vineyards to protect them against the downy mildew in 1912. 

 Following the suggestions of Capus (E. S. R., 25, p. 550), advantage was taken 

 of weather conditions and the vines sprayed with a copper fungicide containing 

 2 kg. of copper sulphate to 1 of lime or carbonate of soda. Five applications 

 were made between April 15 and June 29, followed by three supplemental 

 sprayings in July and August. As a result a good harvest of grapes was 

 secured. 



The author thinks more attention should be paid in spraying to the condition 

 of the vines, the precipitation, and the temperature at critical periods. 



Causes of failure in treating vines for mildew in 1912, J. B. Castelli 

 {Petite Rev. Agr. et Hort., 19 {1913), No. 431, p. 38).— The downy mildew 

 {Plasmopara viticola) is said to have been very destructive in 1912 in vine- 

 yards in Aude and Pyr§nees-Orientales, where from 3 to 5 sprayings were 

 given the vines. Analyzing the conditions that prevailed, the author believes 

 that the failure was due to the application of the fungicides without reference 

 to weather and temperature conditions as well as to faulty spraying. The 

 leaves and young grapes were not protected at the periods of greatest liability 

 to infection. 



A study of the disease produced by Rhizoctouia vlolacea, J. Eriksson 

 {Rev. G6n. Bot., 25 {1913), No. 298, pp. 11,-30, figs. ^).— The author describes 

 diseases of a number of economic plants due to the fungus R. violacea, and 

 considers as to whether there may not be specialized forms of this fungus. 



Among the plants subject to attack are carrots, beets, clover, etc., and inocu- 

 lation experiments made with Rhizoctonia taken from beets produced disease 

 on turnips, carrots, and beets, but not on clover. Other investigations seem 

 to indicate that there are probably rather definitely developed races of this 



