Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . r the fruithas set, to kill the beetle while eating out its crescents. Somepart of the fruit is always injured, though a sufficiently largepercentage to pay for the insecticide application is usually the trees every day or two over a sheet or other recep-tacle has been practised with good success, as the beetles dropreadily and lie quietly for some time, especially early in the day,allowing themselves to be easily gathered up and destroyed. 234 J A ECONOMIC ENTO
Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . r the fruithas set, to kill the beetle while eating out its crescents. Somepart of the fruit is always injured, though a sufficiently largepercentage to pay for the insecticide application is usually the trees every day or two over a sheet or other recep-tacle has been practised with good success, as the beetles dropreadily and lie quietly for some time, especially early in the day,allowing themselves to be easily gathered up and destroyed. 234 J A ECONOMIC ENTOMOLOGY. This is one of those cases where persistent and nniversal practiceis desirable to obtain the best results. An allied but larger species of the same genus without theelevations on the wing-covers is C. crataegi, which attacks thequince and sometimes does considerable injury, much as the does on the fruits above enumerated. The samemeasures are indicated here also. The potato-stalk borer, Trichobaris j-)iotata, is a small ash-gray weevil about one-sixth of an inch in length, with a black Fig. Potato-stalk borer, Tiichobaris trinoiata.—Larva, pupa, and adult. snout and three small black spots at the base of the lays its eggs into the stems and larger branches of the potato,horse-nettle, Jimpson-weed {Datura stramonhwi), and, perhaps,other Solanaceae, and the white larvae feed there until after mid-summer, changing to pupae at about the time when the potato-vines mature, and to adult beetles a short time thereafter. Thebeetles remain in their larval burrows during the winter, and maybe easily destroyed by burning the vines immediately after thepotatoes are harvested. The species of Bala7ii7ius are known as nut-weevils, are ofquite large size, clay-yellow in color, and with an exceedinglylong and slender, black beak or snout. By means of this theypuncture the burrs of young chestnuts, the husks of hickory andwalnuts, and the green coverings
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsectp, bookyear1906
