. Bulletin : report of Agricultural Experiment Station, Agricultural and Mechanical College, Auburn, Ala. Agriculture -- Alabama. 102 the trunk or branches. On the exposed parts of the tree they are most likely to be noticed about the collar and at the forks of the principal branches, or wherever an in- jury to the bark has left a scar. When trees in a nur- sery or young orchard have a sickly look—the leaves dull and yellowish—and are not gTowing well, the pres-. Fig. 7.—Woolly Aphis {Schizoneura laniger.)—a, Agamic fe- male; b, larval house; c, pupa; d, winged female with antenna en- larged a
. Bulletin : report of Agricultural Experiment Station, Agricultural and Mechanical College, Auburn, Ala. Agriculture -- Alabama. 102 the trunk or branches. On the exposed parts of the tree they are most likely to be noticed about the collar and at the forks of the principal branches, or wherever an in- jury to the bark has left a scar. When trees in a nur- sery or young orchard have a sickly look—the leaves dull and yellowish—and are not gTowing well, the pres-. Fig. 7.—Woolly Aphis {Schizoneura laniger.)—a, Agamic fe- male; b, larval house; c, pupa; d, winged female with antenna en- larged above, all greatly enlarged and with wnxy excretin removed. (Marlatt, U. S. Dept. Agr.) ence of this insect on their roots may be suspected even though there may be no appearance of it on the bark above ground. If the roots of such an infested tree be examined they will commonly be found distorted and de- formed with hard knot-like enlargements, many of them almost dead, or even in course of decomposition. These gall-like growths occur on roots of all sizes to a depth of a foot or more beneath the surface. Unless the tree is so far gone that the insects have de- serted it, they will commonly be found upon these in- jured roots at all seasons of the year. The apple is the only tree liable to attack by this in- sect, the current supposition that it may live on the roots of forest trees being an error due to confusion of injury by the woolly aphis with that by the root-rot. As. 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 Agricultural and Mechanical College of Alabama. Agricultural Experiment Station. Auburn, Ala. : The Station
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