560 EXPERIMENT STATION RECORD. 



or more thorough sprayings with Bordeaux mixture are made, not only 

 on the bushes, but on the ground under and around them. — F. W. WOLL. 



The effect of benzolin and sulfurin on potato plants, R. Thiele 

 (Ztschr. PflanzerikranTc., 8 (1898), No. 3, pp. 143-140).— On account of the 

 reputed fungicidal value of these insecticides the author investigated, 

 in the summer of 1897, the effect of spraying benzolin and sulfurin on 

 potato plants for the prevention of the potato blights. Fruit trees and 

 Viciafaba were likewise sprayed. 



Fifty varieties of potatoes were sprayed with these substances and 

 it was found that the effect on the different varieties varied considerably, 

 some plants being seriously injured, the leaves being more or less 

 destroyed and the plants reduced in size, while others were of normal 

 growth. Comparing the results as tabulated, it appears that while the 

 amount of disease was somewhat reduced by the use of the fungicides, 

 there was little difference in the action of the two, and in general the 

 tubers from the treated plats were smaller than those from the checks. 



Danger of introducing a Central American coffee disease into 

 Hawaii, W. T. Swingle ( U. S. Dept. Agr., Division of Vegetable Physi- 

 ology and Pathology Girc.l6,pp.4). — The author calls attention to the 

 presence of a very serious coffee disease in Central America, which is 

 due to the fungus Stilbum flavidum. This disease attacks the plant, 

 producing round or oval dingy yellowish gray spots on the branches, 

 fruits, and especially on the foliage. The necessity for the inspection 

 of all importations of plants from infested regions is pointed out. 



Notes are also given on the coffee-leaf disease due to Hemileiavastatrix, 

 which has about completely destroyed the coffee plantations of Ceylon, 

 and also a disease due to nematodes, which is known in Brazil. 



Phytopathological notes, F. Sitensky ( Abs. in Ztschr. Pflanzenk- 

 ranlc, 8 (1898), No. 3, pp. 148, 149). — The author gives notes on the 

 abnormal growth and condition of a number of plants, some of the 

 most striking of which are herewith mentioned. 



The effect of lightning on an alfalfa field is shown, in which a field in 

 full bloom showed the day after having been struck with lightning a 

 circle about 5 meters in diameter, where the plants were completely 

 wilted. The effect on a pear tree, a poplar, and a larch is also given. 



The occurrence of potato tubers in the axils of the leaves above ground 

 is mentioned ; wherever abundant there were no tubers found below 

 ground. 



Especial mention is given of abnormally swollen sugar and fodder 

 beets which were found in a field the soil of which was unusually dry. 

 The sugar' content of the beets was in every case much lower than that 

 of the mother beets. 



Infection experiments were Conducted with Plasmodiophora brassiciv, 

 in which various species of Brassica, as well as Gheiranthus eheiri, 

 Raphanus sativns, Eruca sativa, and Erysimum crepidi folium were suc- 

 cessfully inoculated. The use of lime in the soil was found a good 

 means for the prevention of this disease. 



