This is the first experiment station bulletin to treat of the cranberry. It considers two diseases, one of which is new. The cranberry gall-fungus is the name which Dr. Halsted gives to a new disease which is sometimes locally known as"red rust." So far as known it occurs only in parts of a single cranberry bog near Brown's Mill, Burlington Co., N. J. The disease was first observed in 1886. "The next season it was quite generally spread over a half of the bog ; in 1888 it was still more abundant, and ruined the crop upon the attacked areas. * * * The galls, since their discovery three years ago, have made their appearance with much promptness about the first of May." These galls are minute, and appear upon the leaves, flowers and stems. "To the naked eye the galls are small protuberances, but as they are usually in considerable numbers on the same part, the infested portion is misshapen, often dwarfed, and of a red appearance." The disease is caused by a fungus known as Synchytrium Vaccinii. It occurs on huckleberries, laurels, winter-greens and other plants bordering the bog.

Definite remedies cannot yet be advised, but the following is suggested: "Withholding the water from the bog during the winter and spring may subdue the fungus, but it would probably be a quicker and even cheaper way to burn the infested plants, and this includes the shrubs along the border and elsewhere that are attacked".

The obscure and vicious cranberry scald or rot is also due to a fungus. This disease attacks the fruits early in the season, first as a "scald," but later causing decay. It is estimated that one-third of the New Jersey crop last year was ruined by this disease. Dr. Halsted presents opinions from 67 cranberry growers in various states. His studies have not yet led to remedies. " Sanding the bog, and controlling the water so that it will be low in midsummer, have usually been a benefit to scalded bogs".