. The American fruit culturist, containing directions for the propagation and culture of all fruits adapted to the United States. Fruit-culture. Fig. 247, Fig. 248. The Pear Psylla. Adult and nymph, much enlarged. April these adults lay their curious, orange-yellow eggs in the creases of the bark about the bases of the terminal buds of the preceding year's growth. By the middle of May, or about the time the first leaves are expanding, most of the eggs have hatched, and the little nymphs are at work sucking out the life of the tree. In about a month these nymphs have devel- oped into adult psyl
. The American fruit culturist, containing directions for the propagation and culture of all fruits adapted to the United States. Fruit-culture. Fig. 247, Fig. 248. The Pear Psylla. Adult and nymph, much enlarged. April these adults lay their curious, orange-yellow eggs in the creases of the bark about the bases of the terminal buds of the preceding year's growth. By the middle of May, or about the time the first leaves are expanding, most of the eggs have hatched, and the little nymphs are at work sucking out the life of the tree. In about a month these nymphs have devel- oped into adult psyllas, which are smaller than those which hibernated, and they soon lay eggs on the leaves for another brood. At least four broods of the insect develop in a season in New York and probably five in Maryland. Many pear-trees are so much weakened by the drain of so many little pumps sucking the sap that they do not have enough vitality to sur- vive the winter. The insect is thus both a serious menace to the tree and to the crop of fruit. It is very important that this pest should be checked early in the season, as the psyllas can be more easily hit with a. 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
