This is a technical paper, dealing chiefly with some very important discoveries in the life history of the leaf-blight. The leaf-blight or "sun-burn" of strawberries is caused by a fungus, Spharella fragarin. The disease is often very injurious just before the fruit should ripen. Professor Dudley finds that the disease survives the winter in three forms. The mycelium remains in the leaves all winter and begins to grow quickly upon the advent of warm weather. Well defined disease was secured in 14 days after artificial inoculation of the leaves. "Aside from care in the selection of soil and in good cultivation, two modes of treatment will be found to repay the fruit grower. First, if the season opens unfavorably, the regular use of fungicides; second, if the fungus persists till autumn, destruction, in the following spring, of all old leaves by burning over." Sulphide of potassium and carbonate of copper, applied early in the season, are recommended.

Another disease, very similar to the former in external appearance, has also been studied. It has not been reported as injurious heretofore, although it has been known by botanists for some time. The treatment recommended for the leaf-blight may be employed.