. The encyclopedia of practical horticulture; a reference system of commercial horticulture, covering the practical and scientific phases of horticulture, with special reference to fruits and vegetables;. Gardening; Fruit-culture; Vegetable gardening. 2026 ENCYCLOPEDIA OF PRACTICAL HORTICULTURE sections of the country. Once established in a field, it will live there for years and kill off the plants whenever watermelons are planted in it. The disease is quite generally distrib- uted throughout the southeastern part of the United States and has been reported from Iowa, Indiana, Arizona, Oklahom
. The encyclopedia of practical horticulture; a reference system of commercial horticulture, covering the practical and scientific phases of horticulture, with special reference to fruits and vegetables;. Gardening; Fruit-culture; Vegetable gardening. 2026 ENCYCLOPEDIA OF PRACTICAL HORTICULTURE sections of the country. Once established in a field, it will live there for years and kill off the plants whenever watermelons are planted in it. The disease is quite generally distrib- uted throughout the southeastern part of the United States and has been reported from Iowa, Indiana, Arizona, Oklahoma and California. It is also destructive in some parts of Oregon. Symptoms The name indicates the characteristic symptoms, the wilting and drooping of the foliage as though the water supply were cut off (Pig. 1). This wilting comes on suddenly and in a very short time the plant is dead. If the main stem of a wilted plant be cut in cross section, the woody part is found to be yellow and discolored, making a marked contrast with the normal plant in which the tis- sues are uniformally white. Sometimes a pinkish, mold-like growth comes out on the surface of the stem soon after the plant is killed, extending for a foot or more up the stem from the crown. Cause This wilt is caused by a Fusarium, a fungus which is capable of living in the soil for several years, and may attack any melon plants that are afterwards planted in fields where it exists. This fungus is composed of a very delicate, branching thread-like growth, so delicate, indeed, that its presence could not be detected in the soil. This growth, on coming in contact with the tender roots of the melon plant, is able to penetrate them, and, once within the tissues of the plant, it finds the proper nourishment for rapid growth. Very small spores are produced and set free in the vessels, where they germinate to start new points of infection. These spores, having ger- minated, produce a growth which plugs up the vessels and so pr
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