. Nature study and life. Nature study. GARDEN INSECTS 219 it not for one pernicious kind, also a foreign importa- tion, that now menaces the best horticultural interests of almost the whole country. Every child who has a garden should learn to know the San Jos6, or pernicious, scale, Aspidiotus pemiciosus. The San Jos6 scale takes its name from the place of its introduction into this country, the San Jose valley, which took place through the medium of treea imported from Chili. Its original home may be Australia, but in spite of diligent search this has not been fully settled. It may have come
. Nature study and life. Nature study. GARDEN INSECTS 219 it not for one pernicious kind, also a foreign importa- tion, that now menaces the best horticultural interests of almost the whole country. Every child who has a garden should learn to know the San Jos6, or pernicious, scale, Aspidiotus pemiciosus. The San Jos6 scale takes its name from the place of its introduction into this country, the San Jose valley, which took place through the medium of treea imported from Chili. Its original home may be Australia, but in spite of diligent search this has not been fully settled. It may have come from China or Japan. Three years after its introduction this scale was recognized as a dan- gerous insect enemy, but it had been widely distrib- uted on cuttings, scions, nursery stock, and fruits shipped to all parts of the country. The insect is minute and covers itself with a circular scale from one to two millimeters in diameter, of an ashy gray color, and with a minute prominence near the center. If unchecked, its power for evil is almost beyond estimate. The young are brought forth alive, and there are four or five generations a year, so that it has been calculated that a single female scale may be the progenitor of 3,216,080,- 400 during a season. This gives the plant no chance for. Fig. 93. The San Josfi Scale (Natural size and magnified). 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 Hodge, Clifton Fremont, 1859-. Boston and London, Ginn & Co.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectnatures, bookyear1902
