The periodical cicada in WVa. . tack of the woolly aphis, and deformed, unproductivebranches is the result. Abundant examples of this condition were fonnd in the oldorchard referred to, and doubtless any of our readers can findthe same thing, who have old orchards in sections where largeswarms of the cicada have appeared within the last twentyyears. OLD CICADA WOUNDS IN 8UGAR MAPLE. The sugar, or hard, maple appears to be the favorite tree forthe cicada to oviposit in, therefore, after I found the oldwounds in apple, 1 examined a near-by sugar maple, andfound numerous examples of cicada scars
The periodical cicada in WVa. . tack of the woolly aphis, and deformed, unproductivebranches is the result. Abundant examples of this condition were fonnd in the oldorchard referred to, and doubtless any of our readers can findthe same thing, who have old orchards in sections where largeswarms of the cicada have appeared within the last twentyyears. OLD CICADA WOUNDS IN 8UGAR MAPLE. The sugar, or hard, maple appears to be the favorite tree forthe cicada to oviposit in, therefore, after I found the oldwounds in apple, 1 examined a near-by sugar maple, andfound numerous examples of cicada scars on the brancheswhich had made a slow growth. The external appearanceof these scars and the curly condition of the woodformed over the wound, are plainly shown in the IV. This curly condition of the wood, due to cicadawounds, would indicate that numerous wounds in the main THE PERIODICAL CICADA. 39 stem of a youug seedling maple, might easily result in a curlycondition of the wood in the trunk of a matured WORK OF A TREE CRICKET. Fig-. 21, punctures with areas of blighted bark. Pig. 22, old wound preveuted from healing by the woolly aphis: alsosection across wound, showing dead wood, at and dying- wood at b. Pig. 31!. oid punctures which have healed without harm, and bark re-moved to show form of egg cavities, the latter enlarged. A SERIOUS INJURY TO OLD APPLE TREES, CAUSED BY TREE CRICKETS. I have been puzzled, for several years, over a peculiar injuryto apple trees which appears to be common in all old orchards,and is quite a serious trouble in some localities. The charac-ter of the injury is clearly shown in Figs. 21. 22, and 23, and inthe reproduced photographs, Plate III. A quite small and nearly round puncture is made throughthe outer bark, and from one to two long cavities are formed inthe inner bark and sometimes grooving the outer surface of the 40 WEST VIRGINIA EXPERIMENT STATION. wood. The wound thus made sometimes heals without doingharm, but
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Keywords: ., bookauthorhopkinsadandrewdelmar, bookcentury1800, bookdecade1890
