. Economic entomology for the farmer and fruit-grower. Beneficial insects. THE INSECT WORLD. 313. Cranberry-fruit worm, Mineola vacchiii.— a, cranberry on which {b, c) the eggs are laid ; d, larva ; e,/, pupa and its tip ; g, cocoon ; h, moth. rather difficult to deal with. One of these is the Mineola vacdnii, or "cranberry-fruit worm," which lives in the berry itself, feed- ing in the seed-capsule, causing the fruit to redden up prema- turely, and then to dry and shrivel on the vine. A single caterpillar may eat into every berry upon a fruit stem in the course of its existence, then
. Economic entomology for the farmer and fruit-grower. Beneficial insects. THE INSECT WORLD. 313. Cranberry-fruit worm, Mineola vacchiii.— a, cranberry on which {b, c) the eggs are laid ; d, larva ; e,/, pupa and its tip ; g, cocoon ; h, moth. rather difficult to deal with. One of these is the Mineola vacdnii, or "cranberry-fruit worm," which lives in the berry itself, feed- ing in the seed-capsule, causing the fruit to redden up prema- turely, and then to dry and shrivel on the vine. A single caterpillar may eat into every berry upon a fruit stem in the course of its existence, then descends to the ground, and Fig. 357. among the leaves and rub- bish spins a tough little co- coon in which the pupa winters safely, even if cov- ered by water. The eggs are laid about the middle of July, singly, on the berries where the blossoms have dropped off, under one of the little triangular flaps. Once the larvae are in the berries there is no way of getting at them, and, practi- cally, the only method of reducing their numbers is to pick the berries as early as may be, being careful to get in all that are infested. By sorting promptly these can be destroyed before the larvae leave them, lessening greatly the number of moths for the following year. The insect is much more troublesome in New England than in New Jersey or in the northwestern marshes. Nearly allied, but with totally different habits, is the Mineola ifidiginella, or-" rascal apple-leaf crumpler," so called from its habit of making irregular, crumpled cases on the apple leaves upon which the insect feeds. It is rather easily reached, where it becomes troublesome, by the arsenical sprays, and in orchards where spraying is generally practised it is incidentally destroyed. Many other of these little species are found on our cultivated crops, but, as a rule, in such small numbers as to be hardly no- ticeable, and only occasionally a species becomes locally injurious. One of the largest of our Easter
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbenefic, bookyear1906
