. The American fruit culturist. ruit stemsthey soon sap the life of trees to such an extent that but littlegrowth is made and the fruit sometimes drops when half-grown. The nymphs secrete large quantities of a sweet,sticky liquid, called honey-dew, which spreads over thebranches and leaves, sometimes even dripping from the through this honey-dew a black fungus grows, so that thebark of badly infested trees has a black, sooty appearance,this is usually good evidence at any time of the year that apear-tree has suffered from the psylla. The adult insects (Fig. DESTRUCTIVE INSECTS. i8i 2
. The American fruit culturist. ruit stemsthey soon sap the life of trees to such an extent that but littlegrowth is made and the fruit sometimes drops when half-grown. The nymphs secrete large quantities of a sweet,sticky liquid, called honey-dew, which spreads over thebranches and leaves, sometimes even dripping from the through this honey-dew a black fungus grows, so that thebark of badly infested trees has a black, sooty appearance,this is usually good evidence at any time of the year that apear-tree has suffered from the psylla. The adult insects (Fig. DESTRUCTIVE INSECTS. i8i 247) are active creatures, quickly jumping and flying out ofreach when approached; they feed, but not enough to do no-ticeable damage. The insect hibernates in the adult stage, hidden in the crev-ices under the loosened bark on the trunk and large limbs ofthe pear trees. During warm days they often crawl about onthe branches and trunk. They are not easily seen as they areso small, and their color so closely imitates the bark. In.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectfruitculture, bookyea
