Overview

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 edition. Excerpt: ... the root, the walls of the woody fibres being curiously corroded by the action of the mycelium. The fruit of the fungus is only produced on absolutely dead roots. It appears under the form of clusters of slender stems, each bearing a small globose head, the whole resembling a miniature drum-stick. The fungus is not confined to the vine. I have seen it in this country on the dead roots of a rose-tree. There is much difference of opinion as to whether this fungus is in reality parasitic, or whether it is saprophyte, following on the injury caused by a parasite. Hartig inclines to.the latter view, whereas Jolicoeur considers that he proved by experiment the parasitic nature of Roesleria. The entire height of the fruit of the fungus is about 2 mm., head white, then greenish brown. Asci cylindrical, soon deliquescing, 8-spored. Spores globose, tinged brown, 4-5 p diam. The fungus is most abundant in a very moist soil, especially the subsoil, and drainage is an important factor in checking the pest. Diseased vines should be removed, and the soil treated with lime to check the spread of the fungus in the soil. Hartig, Diseases of Trees (Engl, ed.), p. 83 (1894). Jolicoeur, Rap. sur le Malad. de la Vigne, connue dans la Marne sous le nom de 'Morille'; Chalons-sur-Marne (1881). Prillieux, Malad. des Plantes Agric., 2, p. 466 (1897). Viala, Malad. de la Vigne, p. 211. The uredines or rusts are undoubtedly the most pronounced fungal parasites known. There is no single instance recorded of any member of the group having passed through the cycle of its development apart from its normal hostplant. The various species are parasitic on all the higher plants, and their distribution is only limited by that of their hosts. Judging from the extreme nature of their...

Full Product Details

9781152234536

Table of Contents

Reviews

Author Information

Tab Content 6

Customer Reviews

Recent Reviews

Countries Available