Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplant00tube Year: 1897 194 ASCOMYCETES. forming, with alkalies, salts soluble in water. This is the real cause of ergot poisoning and gives rise to gangrene. In large doses it produces cramp similar to strychnine, and tetanus of the uterus. (3) Ergotic acid, a nitrogenous, easily decomposed glycoside, which has no effect on the uterus. It is more a narcotic which diminishes reflex excitability and finally stops it. Robert e
Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplant00tube Year: 1897 194 ASCOMYCETES. forming, with alkalies, salts soluble in water. This is the real cause of ergot poisoning and gives rise to gangrene. In large doses it produces cramp similar to strychnine, and tetanus of the uterus. (3) Ergotic acid, a nitrogenous, easily decomposed glycoside, which has no effect on the uterus. It is more a narcotic which diminishes reflex excitability and finally stops it. Robert experimented chiefly with cattle and fowls. He found that an acute course of the poisoning can be distinguished from a chronic ; also a gangrenous ergotism from a spasmodic. The symptoms of the disease are: (1) Gastro-enteric, an excessive salivation accompanied with , blistering, inflammation, wasting and gangrenization of the mouth-epithelium; similar changes also occur on the epithelium of the gut, i)roducing vomiting, colic, and diarrhoea. (2) Gangrenization and mummifica- tion of extremities, consisting of a drying-up, a dying-off', and a detach- ment of extremities, such as nails, ears, tail, wings, claws, toes, and point of tongue. (3) Spasmodic contraction of the uterus and consequent abortion. (4) Nervous phenomena such as in- sensibility, blindness, paralysis, etc. The presence of ergot may be de- tected both microscopically and spec- troscopically. The fungus may be combated by careful separation and de- struction of sclerotia, and by the use of clean seed. Claviceps microcephala (Wallr.) (Britain). This is found on Fhragmifes, Molinia, Nardus, etc. It has smaller sclerotia, which, according to Hartwich,- FlG 8(3.—Sclerotia of ttaiiceps ?m«-oc<;p<nfc prmfoiii tbrpp finip<! q<« miipb on Molinia coeridea. (v. Tubeuf phot.) COUtani lUree tUneS aS UlULZl Ergotin as those of CI. inirpurca. Smith {Diseases of field and garden crops. 1884. p. 233)
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