. A manual of injurious insects [microform] : with methods of prevention and remedy for their attacks to food crops, forest trees, and fruit : to which is appended a short introduction to entomology. Insect pests; Agricultural pests; Entomology; Insectes nuisibles, Lutte contre les; Ennemis des cultures, Lutte contre les; Entomologie. 260 PINE. about in summer, and would gradually wash ofif without harming the surface to which it was applied. For general purposes, the only reasonably practical way of preventing spread of Sirex-infestation appears to be as previously mentioned, timely removal o
. A manual of injurious insects [microform] : with methods of prevention and remedy for their attacks to food crops, forest trees, and fruit : to which is appended a short introduction to entomology. Insect pests; Agricultural pests; Entomology; Insectes nuisibles, Lutte contre les; Ennemis des cultures, Lutte contre les; Entomologie. 260 PINE. about in summer, and would gradually wash ofif without harming the surface to which it was applied. For general purposes, the only reasonably practical way of preventing spread of Sirex-infestation appears to be as previously mentioned, timely removal of infested timber, whether in the form of standing or felled trees, or fallen trees, or infested limbs. Pine Weevil. Hylobhis ahictis, Linn. It \'-. 1, Pine Weevil, magnified: line showing nat. length (snout included); 2, 3, Larch twigs injured by weevils; 4, head, with snout and horn and fore leg, magnified. The Pine Weevil is injurious to Scotch Fir, Spruce, Larch, and some others of the Coniferae, by feeding on the tender bark of the young shoots. It mainly attacks young trees, especially plantations formed on ground from which a crop of old Fir has recently been removed, and eats away the bark of the stems, sometimes completely stripping them upwards. It also eats the bark of the shoots, and destroys the bud; and, in the Larch, it gnaws at the base of the leaves so as to render the shoots bare. The beetles appear early in the summer, sometimes in May, but chiefly in June and July. In unfavourable weather they remain under shelter of the leafage, but when it is warm and sunny they are more active, and pairing then takes place. The females deposit their eggs, which are transparent and whitish, in rifts of the bark, in logs, root-stocl's, stumps of felled trees, and on exposed parts of roots. The maggot hatches in two or three weeks, and may be found from June onwards throughout the winter. When full grown it is about half an inch long, fleshy and white, with a brown head, whi
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectentomology, bookyear1
