. Fig. 2.—Eoot of alfalfa plant affected with bacterial wilt, showing the characteristic dark-brown areas found on the inside of the bark and sometimes on the wood. Such spots have never been found on plants affected with alfalfa dwarf. (Courtesy of Jones and McCulloch; from Cir. 326.) leaflets (fig. 1), and gradually die. When the bark is peeled back from the taproot, the outermost part of the woody cylinder shows a straw- yellow to brownish-yellow color as contrasted to the normal white of

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Keywords: ., bookcentury1900, bookcollectionamerica, booksubjectplantdiseases