Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; . economicentomol00smit Year: 1906 232 AN ECONOMIC ENTOMOLOGY. crop only is obtained on the pollenizers, the main crop will be safe without protection. Insecticides have not proved markedly useful in this case. Other species of this genus have proved more or less trouble- some, notably A. quadri-gibbus, on apple, but none of these Fig. 239. Work of the strawberry-weevil.—a, shoot of strawberry-plant bearing punctured buds, b ; the egg at c; larva at d; pupa at/,- at^ an
Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; . economicentomol00smit Year: 1906 232 AN ECONOMIC ENTOMOLOGY. crop only is obtained on the pollenizers, the main crop will be safe without protection. Insecticides have not proved markedly useful in this case. Other species of this genus have proved more or less trouble- some, notably A. quadri-gibbus, on apple, but none of these Fig. 239. Work of the strawberry-weevil.—a, shoot of strawberry-plant bearing punctured buds, b ; the egg at c; larva at d; pupa at/,- at^ an open strawberry-flower showing the holes eaten by the beetles. require more attention here, and the next species in order is Conotrachelus nenuphar, the redoubtable ' plum-curculio.' Next to the 'codling-moth,' this is, perhaps, the most serious of the orchard pests, and it ranks above it in the difficulty attend- ing its control. The beetle itself is less than one-fourth of an inch in length, chunky in appearance, brown, with black and gray mottlings, and with four elevated excrescences on the wing- covers. The beetle hibernates and appears in early spring, feed- ing first upon the unopened buds and afterward upon the young
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