. The Dutch elm disease. 4 CIRCULAR 17 0, U. S. DEPARTMENT OF AGRICULTURE The American elm, which is of most interest in this country, has been found to be severely attacked in both England and Germany. Inoculations on young trees, made by the senior writer under quarantine conditions, as well as those of European investigators, confirm its high susceptibility. (Fig. 3.). Fif^UEE 3.—On the right is a young American elm 14 days after it was inoculated with the Dutch elm-disease fungus. The seedling in the center is one of the check trees, which were treated similarly except that the fungus was
. The Dutch elm disease. 4 CIRCULAR 17 0, U. S. DEPARTMENT OF AGRICULTURE The American elm, which is of most interest in this country, has been found to be severely attacked in both England and Germany. Inoculations on young trees, made by the senior writer under quarantine conditions, as well as those of European investigators, confirm its high susceptibility. (Fig. 3.). Fif^UEE 3.—On the right is a young American elm 14 days after it was inoculated with the Dutch elm-disease fungus. The seedling in the center is one of the check trees, which were treated similarly except that the fungus was not Inserted In the wound. - The check tree on the left was almost completely severed, hut it showed no signs of wilting The English elm {Ulmus ccunpestris), the Holland elm {U. hoUandica), and the Scotch elm {U. glabra), which are planted to some extent as ornamentals in this country, are likewise susceptible to the disease. ZeK'ova keall, a tree closely related to the elms, also has been found by inoculation to be 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 May, Curtis. [from old catalog]. [Wash. ]
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherwash, bookyear1901
