DISEASES OF PLANTS. 573 



Brabant, while in the calcareous soils of other regions the disease seems to have made 

 its appearance only in recent years. 



A list is given of the various plants on which the fungus lives, the author having 

 compiled information from various sources, hi Belgium it is found that in addition 

 to cabbage, ruta-bagas, turnips, kohl-rabi, and radishes, the fungus attacks held and 

 cultivated mustard, shepherd's purse, Iberis umbellata, ami Cheiranthus cheiri. 



Report on vegetable pathology, II. Tryon (Queensland Dept. Agr. A'/-/. 1904, 

 l>l>. 69, 70). — Brief notes are given on a number of diseases of fruits, vegetables, 

 coffee, cotton, tobacco, wheat, etc., that have been reported during the past year, 

 and some of the species of fungi are under investigation. 



The apple scab in western Washington, W. II. Lawrence ( Washington Sta. 

 Bui. 64, pp. 24, pis. 2, jigs. 5). — The apple seal), which is widely distributed through- 

 out the United States, being particularly abundant along the Atlantic Coast and 

 Middle Atlantic States, has become abundant and destructive in western Washington. 



A description is given of the life history of the fungus, its '2 stages being described at 

 considerable length. The summer stage, which is the form most widelj known, has 

 been referred to Fusicladium dendriticum, and the resting stage has been recently 

 described as the fungus Venturia insequolis. The different phases of the fungus and 

 its effect upon the host plant are described, and notes given on the susceptibility of 

 different varieties of apples to disease. 



Spraying experiments have been conducted for several years at the Puyallup Sub- 

 station for the control of this disease, and have shown that thorough spraying with 

 bordeaux mixture reduces the percentage of scabby apples to a very great extent. 

 These experiments have been repeated on a number of varieties and have given 

 similar results. Directions are given for the preparation and application of bordeaux- 

 mixture. Experiments with potassium sulphite have been without benefit, and 

 ammoniacal copper carbonate and a sal-soda copper-sulphate solution have both 

 proved less efficient than the plain Bordeaux mixture. 



Anthracnose of the pomelo, H. II. Home ( Florida Sta. />'»/. 74, pp. 159-172, 

 figs. 4)- — Attention was called to this disease in a previous publication (E. S. R., 12, 

 p. 463) where the disease was described as a leaf spot. During the season .if i;»<)3— \ 

 a new disease appeared on the pomelo fruit in a number of sections of the State, and 

 careful examinations showed that it was caused by the fungus Colletotrkhum glceospo- 

 rioides, the cause of the leaf spot. 



The effect of the fungus on the leaves, twigs, and fruit is described at length. The 

 conditions favoring the disease are said to be a starved condition of the trees, the 

 action of wind in causing abrasions on the fruit, branches, and leaves, frost injury, die 

 back and other diseases, and insect punctures. As remedial treatment the author 

 recommends the removal and destruction of all diseased fruit, the cutting out and 

 burning of dead and diseased branches, the raking and burning of leaves about the 

 trees, and 3 or 4 applications of Bordeaux mixture, beginning early in the season. 



In order to prevent the fruit from decaying after being gathered, it is suggested 

 that it be washed with an ammoniacal solution of copper carbonate before shipping. 



A disease of stone fruits, L. Trabit (Bui. Agr. Algerie et Tuni.ve, 10 (1904), 

 No. 10, pp. 213-216, fig. 1). — A description is given of a disease of apricots, peaches, 

 and cherries caused by the fungus Ooryneum beyerinclii. 



Ordinarily the fungus is said to only attack the leaves and produce comparatively 

 little injury, but recently it has occurred in greater intensity and 2 distinct forms are 

 recognized, one being limited to the blade of the leaf, while the other is more general- 

 ized and attacks the young shoots and branches, causing a production of gum which 

 is particularly noticeable in the case of the apricot. The injury is in proportion to 

 the prevalence of the fungus. 



