. 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. 288 j,ii!i! OAK. The gall of the Neurotems lenticiilaris is distinguishable from the four other kinds of Spangle Gall found in Britain by its somewhat larger size, and also by being raised in the centre and hairy. It sometimes occurs in great quantities on the ba
. 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. 288 j,ii!i! OAK. The gall of the Neurotems lenticiilaris is distinguishable from the four other kinds of Spangle Gall found in Britain by its somewhat larger size, and also by being raised in the centre and hairy. It sometimes occurs in great quantities on the backs of Oak leaves, but rarely to an extent to cause serious damage. _ In the above short notes I have not alluded to the varia- tions of form which may exist, or may be supposed to exist, in alternate generations of various of the Cynipidce, as these are rather points of curious speculation than serviceable for general use. Oak Leaf-roller Moth. Tortrix vimhma, Tortrix viriflana: Moth; caterpillars hanging by their threads, slightly larger than life; rolled Oak-leaf. The caterpillars of this moth cause serious injury from time to time in our Oak woods and forests, especially in the south of England, by feeding in such vast numbers on the young leaves as to strip the trees of their foliage, and thus retard the growth of the first shoots, and injure or entirely ruin the acorn crop of the season. The eggs are laid during the summer or autumn of the year preceding the attack of caterpillars, either on or in the leaf buds, or on the boughs (opinions diifer as to the precise spot); but in the following spring, when the Oak loaves are appearing, the caterpillars hatch, and sometimes swarm in myriads over the infested trees on many acres of ground. The caterpillars are at first greenish grey, or lead-colour, alteiwards d " ' ' " ^ . - - . gr< lead and tail-patch black, and. Please note that these images are extracted from scanned page images that may have been digit
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectentomology, bookyear1
