Economic entomology for the farmer Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; economicentomol00smit Year: 1906 AN ECONOMIC ENTOMOLOGY. and leaving the empty pupa cases projecting all around. Some species are occasionally so numerous that the nests constructed by them become enormous,âfour or five feet in height, and covering young trees entirely. This and other species having the same habit can be dealt with by early spraying, or, when feasible, by picking off the webbed leaves or shoots. The best known of all belo
Economic entomology for the farmer Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; economicentomol00smit Year: 1906 AN ECONOMIC ENTOMOLOGY. and leaving the empty pupa cases projecting all around. Some species are occasionally so numerous that the nests constructed by them become enormous,âfour or five feet in height, and covering young trees entirely. This and other species having the same habit can be dealt with by early spraying, or, when feasible, by picking off the webbed leaves or shoots. The best known of all belonging to this family is the '' codling moth,' Carpocapsapomonella, and there is no insect, except possi- bly the '' plum curculio,'' that has done more injury to our orchard- ists. The moth appears at about the time the apple-trees are in blossom, and lays a single â ^^ â egg upon the young fruit at the point where the blossom has dropped off. In a few days the caterpillar hatches, eats a little on the outside for a day or two, and then makes its way into the fruit itself, feeding around the seed-capsule or core, and making the well-known 'worm' in the apple. Oc- casionally two or more moths may oviposit on the same fruit, and this ac- counts for the two or more larvae sometimes found in one apple. Except in the northern part of the country, there are two broods, the first caterpillars becoming full-grown and leaving the apples about midsummer, changing very soon thereafter to moths, which lay the eggs for the larvae found in the ripe apples. The second brood does not so usually oviposit at the blossom end, but seems to have a preference for the point where two fruits touch, for we often notice that in a little bunch of apples every one is infested, the entrance in all cases being just at the point of contact. In any event, whether there is one brood or two, the caterpillars of the last, when full-grown, leave the apples, find a hiding-place under The codling moth, Carpoca
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