. Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges;. Insects; Pests. 2o8 //yV ECONOMIC ENTOMOLOGY. cates the presence of such a larva. Apple-trees are sometimes attacked, and the best measure for general adoption is the sys- tematic gathering and burning of all fallen twigs and branches during the winter. The insects are not confined to terminal branches only, but sometimes attack the trunks of young shoots or trees after a fire has been over the ground and scorched them, and in such cases the larvae make no effort to gird
. Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges;. Insects; Pests. 2o8 //yV ECONOMIC ENTOMOLOGY. cates the presence of such a larva. Apple-trees are sometimes attacked, and the best measure for general adoption is the sys- tematic gathering and burning of all fallen twigs and branches during the winter. The insects are not confined to terminal branches only, but sometimes attack the trunks of young shoots or trees after a fire has been over the ground and scorched them, and in such cases the larvae make no effort to girdle. In the genus Cyllene we have moderate-sized species that are dark velvety brown or blackish, with bright golden-yellow bands. Of these, C. pidiis infests hickory not uncommonly, and appears in spring, while C. robinitz infests the locust, and appears in fall. This latter is a serious pest, and makes growing locusts simply impossible in many localities. As soon as a tree attains a moderate size it is riddled with the large holes made by the larvae, and leads but a sickly life for a few years thereafter, event- ually dying down to the ground. The beetles themselves frequent the flowers of golden-rod, and may be collected there in great numbers, the females resorting to the locusts only when ready to oviposit. An allied, yet larger and prettier, species, P/a- gionohLS speciosus, bores into maple, but is usually somewhat rare and has not proved injurious until very recently in some parts of New Hampshire, where certain shade-trees suffered. We sometimes find a small larva belonging to this series boring into the branches and smaller shoots of currant- bushes, and early in spring these change to a small, brown, somewhat flattened beetle, rarely exceeding one-quarter of an inch in length, clothed with white hair grouped to form two white spots towards the end of the wing-covers. This is the Psenocorzis snpernotahis, which is occasionally abundant enough to be troublesome. It can
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsects, bookyear1906
