. Biennial report of the Oregon State Board of Horticulture ... Horticulture -- Oregon; Fruit-culture -- Oregon; Gardening -- Oregon. 276 Appendix. been repeatedly introduced since on trees brouglit from nurseries in other states. It is now Isnown to be present in tlie following New Hampshire citiea and towns, and probably is found in several others: Dover, Durham, Epping, Intervale, Manchester, Rollinsford, Seabrook. The presence of the pernicious scale is difficult to detect until it becomes sufficiently abundant to injure or kill the infested tree. It then appears as a curious scaly crust o
. Biennial report of the Oregon State Board of Horticulture ... Horticulture -- Oregon; Fruit-culture -- Oregon; Gardening -- Oregon. 276 Appendix. been repeatedly introduced since on trees brouglit from nurseries in other states. It is now Isnown to be present in tlie following New Hampshire citiea and towns, and probably is found in several others: Dover, Durham, Epping, Intervale, Manchester, Rollinsford, Seabrook. The presence of the pernicious scale is difficult to detect until it becomes sufficiently abundant to injure or kill the infested tree. It then appears as a curious scaly crust on the bark. When only a few are present it is difficult to find them, as they are simply small round spots of much the same color as the bark, to be seen plainly only through a magnifying glass. Their presence gen- erally is not discovered for two or three seasons after they first appear, by which time they have usually spread to surrounding trees. Fig. 2—Appearance of scale on bark: n, infested twig, natural size; b, bark as it appears under band lens showing .scales in various stages of development and young larvse. (Original). The individual scale is a small round object closely attached to the bark, not more than one-eighth of an inch in diameter and having a darker raised point near the center. At first these round scales are likely to be scattered here and there over the bark, but as they increase in numbers they are nearer together, touching or overlapping one another, and perhaps finally making a thick, scurfy layer of a grayish color that obscures the natural color of the bark, and is easily rubbed off with the finger. The presence of such a layer indi- cates that the sap from the bark is being sucked out by millions of the insects and that the health of the tree is being seriously Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustration
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