. The American fruit culturist, containing directions for the propagation and culture of all fruits adapted to the United States. Fruit-culture. 168 DESTRUCTIVE INSECTS. power of multiplication. *rhe insect winters in the form of small round black scales scpjceiy larger than a pin's head. These become full grown ir May or June, when they are of a grayish color and nearly ^n eighth of an inch in diameter. There is no egg stage, *he young lice being born alive, and they may become mothers in about forty days. Thus there are from three to five fjenerations of the scales during a season, and as on
. The American fruit culturist, containing directions for the propagation and culture of all fruits adapted to the United States. Fruit-culture. 168 DESTRUCTIVE INSECTS. power of multiplication. *rhe insect winters in the form of small round black scales scpjceiy larger than a pin's head. These become full grown ir May or June, when they are of a grayish color and nearly ^n eighth of an inch in diameter. There is no egg stage, *he young lice being born alive, and they may become mothers in about forty days. Thus there are from three to five fjenerations of the scales during a season, and as one Ti'^tter may rear from one hundred to five hundred. Fig. 228. Fig. 229 Fig. 228.—San Jos4 Scale.—Female insect which lives under the scale, greatly enlarged. (Adapted from Howard's figures.) Fig. 229.—San Jos€ Scale, natural size. young, it ^ easy to understand, how a few scales may soon cover a tree with their progeny. If one of the scales be tipped over at any time, there will be found the soft, yellow body of the insect itself, as shown in Fig. 228. Much legislation has been enacted to prevent the spread of or to exterminate this pernicious pest, and much good has re- sulted from the systems of inspection of nurseries and or- chards, but eventually every fruit-grower will have to work out his own salvation. Fruit-growers should understand that the insect can never bo exterminated in any seriously infested orchard or locality without destroying the trees, but it can be, and some are controlling it as efEectually as they are some other fruit pests. It can best be treated when the trees are dormant, but much. 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 Thomas, J. J. (John Jacob); Wood, William H. S. New York, Orange Judd
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectfruitculture, bookyea
