. Fungous diseases of plants, with chapters on physiology, culture methods and technique . ado, and * ^m to b^^^H I ^o FUNGOUS DISEASES OF PLANTS I are the seat of action, and later the pitted vessels are late stages of the disease the lesions may be considerable, thebundle system being broken down and cavities formed in the ad-jacent tissues. The lesions are also very noticeable when theorganism has gained entrance to the fruit. The organism is a rod averaging two or three times as longas broad, X -S--/? often adhering in twos, and rapidlymotile only when young (Fig. 37).
. Fungous diseases of plants, with chapters on physiology, culture methods and technique . ado, and * ^m to b^^^H I ^o FUNGOUS DISEASES OF PLANTS I are the seat of action, and later the pitted vessels are late stages of the disease the lesions may be considerable, thebundle system being broken down and cavities formed in the ad-jacent tissues. The lesions are also very noticeable when theorganism has gained entrance to the fruit. The organism is a rod averaging two or three times as longas broad, X -S--/? often adhering in twos, and rapidlymotile only when young (Fig. 37). The rods are readily stained. FiG. 36 Bacterial Wilt of Melons. (Photograph by TT. H. Whetzelj with carbol fuchsin, but the flagella are not so readily Wmon- ^^^(Blstrated. Growth in bouillon results in a turbidity, and in potatodecoction viscosity is developed with age. Coagulation of milk x^does not occur, and after weeks no viscosity is evident. Ongelatin growth is slow, and there is no liquefaction. Similarly,on agar the clear, or milk-white, colonies spread slowly. Stabcultures develop a sUght growth throughout the extent of thestab, with lobulated projections. On slices of potato there is a
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