546 EXPERIMENT STATION RECORD. [Vol.35 



Diseases of garden vegetables in Switzerland, E. Mayor {Rameau Sapin, 

 48 {1915), pp. 39, JfO, U-4'^; 49 {1915), pp. 7, 8, 12-15; ahs. in Bot. CentU., 129 

 {1915), No. 1, p. 6). — A brief review is given of diseases of garden vegetables, 

 particularly in the Canton of Neuchatel, also of corresponding control measures. 



The physiology of Phoma betse, R. Schander and W. Fischer {Landw. 

 Jahrb., 48 {1915), No. 5, pp. 717-738). — Reports of previous investigations by one 

 of the authors (E. S. R., 28, p. 628; 33, p. 53) are followed up with a detailed 

 account of studies on P. betw as affected by modifications of the nutritive me- 

 dium, by temperature, and by poisons as employed in sprays. 



Hot water does not seem to be practically protective against this fungus. 

 Among the more satisfactory chemical sprays mentioned are corrosive sublimate 

 and a few proprietary preparations. 



Club root of cabbage, C. Hammari.und {Meddel. Centralanst. Forsoksv. 

 Jordbruksomrddet, No. 106 {1915), pp. 14, figs. 7; K. Landtbr. Akad. Hundl. och 

 Tidskr., 54 {1915), No. 2, pp. 110-121, flys. 7). — Experiments on control of cru- 

 ciferous club root {Plasmodiophora brassicce) gave results which were most 

 favorable to formalin in regard to the expense, which is only one-third that of 

 carbon bisulphid, and in regard to its harmlessness as compared with lime in 

 large percentages. It was proved that the disease is spread by feeding the dis- 

 eased plants to cattle, which does not destroy the organism, though its dispersal 

 in this way may be avoided by thoroughly cooking the plants. 



Gloeosporium caulivorum injuring red clover in Hungary, D. Hegyi 

 {Mezogazdasdgi Szemle, S3 {1915), No. 2, pp. 55-58; abs. in Internat. Inst. Agr. 

 [Rame}, Mo. Bui. Agr. Intel, cuul Plant Diseases, 6 {1915), No. 4, P- 637). — In 

 different portions of Hungary, but particularly those along the right bank of 

 the Danube, great injury was done in 1914 to red clover by G. caulivorum. As 

 the fungus is thought to be carried by the seeds, it is recommended that these 

 be soaked in 1 per cent solution of copper sulphate before planting. 



Transmission and control of bacterial wilt of cucurbits, F. V. Rand and 

 Ella M. A. Enlows {U. S. Dept. Agr., Jour. Agr. Research, 6 {1916), No. 11, 

 pp. 417-434, pis. 2, figs. 3). — The authors have made a study of insect transmis- 

 sion of the bacterial wilt of cucurbits. Experiments, as far as completed, indi- 

 cate that cucumber beetles {Diabrotica spp.) are the most important, if not the 

 only, carriers of the wilt oi'ganism {Bacillus tracheiphilus) , and that at least 

 one species (D. vittata) is capable of carrying the wilt over winter and in- 

 fecting the spring plantings of cucumbers. 



In spraying experiments carried on in 1915, the wilt was effectively con- 

 trolled by a spray consisting of a combination of Bordeaux mixture and ar- 

 senate of lead. Plats sprayed with either alone showed less wilt than un- 

 sprayed plats, but the control was not so complete as when the two were used 

 together. Inasmuch as it has been proved that insects are the carriers of the 

 disease, insect control becomes necessary for preventing the wilt. This phase 

 of the work is to be given further study in cooperation with the Bureau of 

 Entomology of this Department. 



Bacteriosis of cucum.ber in Italy, G. B. Traverso {Atti R. Accad. Lincei, 

 Rend. CI. Sci. Fis., Mat. e Nat., 5. ser., 24 {1915), I, No. 5, pp. 456-460).— A 

 serious bacterial disease of cucumbers is described as having appeared in May, 

 1914, following a severe outbreak of Gloeosporium lagenarium in 1913. The 

 disease appears on the adult leaves and the fruits while the roots and young 

 shoots are still normal. Bordeaux mixture, if applied to the plants when very 

 young, is thought to have some protective value. 



Leaf rust of cucumber, P. Sprenger {Mitt. K. K. Gartenbau Gesell. Steier- 

 mark, 41 {1915), No. 1, pp. 4, 5; abs. in Bot. Centbl., 128 {1915), No. 15, p. 



