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The fungus mycelium (with a large scale enlargement).
Formation and maturing of the zoosprange.
Emergence of the zoospores from the zoosprangia moving in the water (through the ultramicroscope).
The formation of oozones and anterides in the cultures.
Experimental inoculation of chestnut plants.
Necrosis produced by infection.
The oospores which form in the tissues of infected piants.
The Japanese chestnut. Distinctive characteristics of the Italian chestnut.
Picture of some plants of Japanese chestnuts in Europe.
Various diseases of agricultural plants.
Picture of a field of corn afflicted by this disease. Some close-ups of plants, showing the darkening of the bases. An uprooted plant, enlarged.
Projections of microscopic preparations showing the fungine mycelia of the Ophiobolus and the Leptophaeria. Possibly other mycelia that may accompany or follow those of the above mentioned fungi.
Organs of reproduction of the Ophiobolus and the Leptosphaeria.
Pictures of a field of corn stubble already afflicted by the disease.
The reproductive organs of the above mentioned fungi remain on the stubble.
Burning of the stubble.
Wheat rusts. — Picture of a corn field afflicted by these parasites. Some close ups of plants, to show the peculiar characteristics of each kind of rust. (Puccinia triticina P. glumarum, P. granimis).
The differential characteristics of uredospores and teleutospores of these rusts (projection of microscopic preparations). The cycle of development of the P. graminis.
Germination of the teleutospores.
Formation of the basidiospores.
Germination of the basidiospores.
Infection of Crespino leaves.
Infection of a wheat plant by ecidiospores.
Formation of uredospores.
Picture of certain facts regarding the relationships between rusts and the affected plant.
Spots of hypersensitivity.
Picture of microscopic preparations showing the mycelia of rusts in the toxines of the leaf. Austores.
Among direct methods of combatting rusts two cultures may be shown : one with sulphur, in which the germination of the spores does not take place, while in another, without sulphur, the uredospores germinate.