. The diseases of crops and their remedies : a handbook of economic biology for farmers and students. Plant diseases. 58 DISEASES OF CROPS. ing a kind of " head " with one or more lacunse (apertures). The mature spores rupture the " skin " of plant potato and are therefore liberated. Prevention and Cure.—(1) The seed potatoes should be free from this disease. (2) Steep the seed potatoes in a solution containing from 1 to 5 per cent, of iron sulphate. This will destroy any spores of the potato smut that may be upon them. Fusisporium solani {Periola tomentosa, Fig. 24) is ano

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. The diseases of crops and their remedies : a handbook of economic biology for farmers and students. Plant diseases. 58 DISEASES OF CROPS. ing a kind of " head " with one or more lacunse (apertures). The mature spores rupture the " skin " of plant potato and are therefore liberated. Prevention and Cure.—(1) The seed potatoes should be free from this disease. (2) Steep the seed potatoes in a solution containing from 1 to 5 per cent, of iron sulphate. This will destroy any spores of the potato smut that may be upon them. Fusisporium solani {Periola tomentosa, Fig. 24) is another fungus which attacks potato crops. It makes. Fig. 24.—FusispoKinii solani of Potatoes. (X 200 aiam.) its appearance chiefly in the autumn, when it is to be seen upon the potatoes growing in the soils of the sotith- ern and midland counties. So far, it has confined its attacks to these covinties, and has not been discovered in Wales or Scotland. Fusisporium solani attacks chiefly the starch granules of the tuber by sending its mycelium amongst the cells, and thereby causes putrefaction. The mycelium, in a few hours, gives rise to conidiophores, being crescent-shaped compound conidia (spores) (Fig. 24 B). The spores, which are divided by three transverse septa, separate when mature (Fig. 24 C), forming four more or less square-ended spores. These subsequently. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Griffiths, A. B. (Arthur Bower), 1859-. London : G. Bell