. Bush-fruits. Berries; Fruit-culture. 260 Bush-Fruits they look something like the black knot in plums, but are seldom so dark in color. In Germany the dis- ease is known as "; It has ruined thousands of trees in dif- ferent parts of the United States and is one of the dreaded enemies of the nurseryman and orchardist. The cause of the malady was long in doubt, it having been attributed to eelworms, slime-moulds and other agencies at different times in the past. It is now believed to be a bacterial disease. It is found on daisy, poplar, rose, peach, apple, raspberry, blac
. Bush-fruits. Berries; Fruit-culture. 260 Bush-Fruits they look something like the black knot in plums, but are seldom so dark in color. In Germany the dis- ease is known as "; It has ruined thousands of trees in dif- ferent parts of the United States and is one of the dreaded enemies of the nurseryman and orchardist. The cause of the malady was long in doubt, it having been attributed to eelworms, slime-moulds and other agencies at different times in the past. It is now believed to be a bacterial disease. It is found on daisy, poplar, rose, peach, apple, raspberry, blackberry, and many other plants. It is either due to the same or closely related organisms, as in the case of the legume bacteria. It is the same disease whether on the roots, stems, branches, or at the crown of the plant. The bacteria live within the cells of the plant. Galls are most readily produced in soft, growing tissue and especially wherever wounds or injuries occur. This doubtless led to the belief at one time common among nursery- men, that the swellings were simply due to injuries of different kinds. The disease has been very carefully studied by the Bureau of Plant In- dustry at Washington. Many cross Fig. 38. Root-gall of raspberry, inoculations were made, as from peach to raspberry, blackberry, and the like, and even from daisy to many other plants. The beginning of the gall could sometimes be detected as early as the fourth day after the inoculation was. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Card, Fred Wallace, 1863-. New York, Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfruitculture, bookyea
