Diseases of plants (colour litho)

Diseases of plants: 1. Ustilago carbo (smut); a. on oats; b. on wheat; c. on barley; d. on spores (greatly magnified); e. germination of the spores; 2. tilletia caries (Bunt); a. healthy grain of wheat; b. one attacked by bunt; c. the same cut through; 3. urocystis occulta; a. stem; b. spore; c. spore germinating; 4. claviceps purpurea (causing ergot of rye); a. sclerotia on an ear of rye; b. germ attacked; c. formation of the sclerotium; d. sclerotium with stromata; e. section of stroma; f. perithecium; g. ascus with spores; 5. puccina graminis (causing rust); a. stem of cereal with teleuto spores; b. leaf with uredospores; c. aecidia on barberry leaves; d. germination of an uredospore; c. section through a layer of spores, with red uredospores and brown teleutospores; f. germination of a teleutospore; g. sectionm of a barberry leaf with aecidia and spermogonia; 6. Oidium tuckeri (of vines); a. vine leaf affected; b. thallus threads with concidia; 7. phytophthora infestans (causing potato disease); a. leaf affected; b. thread bearing conidia; c. conidium (zoospore) liberating zoogonidia; d. zoogonidia; 8. rhytisma acerinum (on maple leaf); 9. exoascus pruni; a. plum affected; b. fungus partly with spores.