. L'encyclopédie de l'horticulture ; pratique un système de référence de l'horticulture commerciale, couvrant les phases pratiques et scientifiques de l'horticulture, en particulier pour les fruits et légumes ;. Jardinage ; culture ; fruits-légumes. Maladies de chou 675 facilité. Elle doit être traitée de manière intelligente, pour la première, une fois établie, la maladie est difficile à contrôler. Bactérie de la pourriture brune ou noire campestre (Pam) reg. Sm. Est une maladie grave de ces deux cruci- fers, et les attaques d'autres personnes de la famille, y compris le navet. C'est un véritable fléau pour les producteurs de chou

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. The encyclopedia of practical horticulture; a reference system of commercial horticulture, covering the practical and scientific phases of horticulture, with special reference to fruits and vegetables;. Gardening; Fruit-culture; Vegetable gardening. CABBAGE DISEASES 675 ease. It must be dealt with intelligently from the first, for, once established, the disease is a difficult one to control. Brown or Black Rot Bacterium campestre (Pam) Erw. Sm. Is a serious disease of these two cruci- fers, and attacks others of the family, including turnips. It is a veritable scourge to the cabbage growers of Ohio and other states. Smith (Farmers* Bui. 68, U. S. D. A.) has published concerning it and has attributed the disease to a specific germ. The diseased heads may be dwarfed, in portions rotted, and brown colors will appear in the woody layers of the plant, including the stem. Badly dis- eased heads emit a penetrating and offens- ive odor. The losses from the brown rot have been very large and specific reme- dies cannot be stated. The author quoted sums up the subject of treatment in one word—prevention. The measures recom- mended are—plant on new land and only from healthy seed beds; avoid succession of the same crops; avoid stable manure and give preference to artificial fertilizers to escape possible infection through the manure. Prevent animals from cropping in diseased fields. Clean tools by scour- ing bright after use in infected soil. Fight the cabbage insects, since these inoculate healthy plants with the disease. Removal of badly affected plants, or newly infected leaves, at intervals, and subsequent burn- ing or deep pitting of this refuse may aid in checking brown rot. Destroy all mustard weeds. The water pores of the cabbage are large, as is evidenced by the great amount of water which collects on the outside of the leaves under certain conditions, which makes the cabbage quite suscept- ible to this form of disease. A. D. Selby, Wooster, Ohio. Club Root Plasm

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