. Bulletin - New York State Museum. Science. 14 NEW YORK STATE MUSEUM seen European elms badly defoliated and within 50 feet others of the same species would be hardly affected. In the past three years the insect made its way along certain rows of European elms in Albany at the rate of about a block a Fig. 3. —Leaf showing holes eaten by elm-leaf beetle The larvae are very rarely found on the upper part of the leaf, but they occur on the under surface of the leaves and feed there almost exclusively. It is also evident that in most cases the trees are attacked near the top, probably beca
. Bulletin - New York State Museum. Science. 14 NEW YORK STATE MUSEUM seen European elms badly defoliated and within 50 feet others of the same species would be hardly affected. In the past three years the insect made its way along certain rows of European elms in Albany at the rate of about a block a Fig. 3. —Leaf showing holes eaten by elm-leaf beetle The larvae are very rarely found on the upper part of the leaf, but they occur on the under surface of the leaves and feed there almost exclusively. It is also evident that in most cases the trees are attacked near the top, probably because the foliage of the upper portion of the trees is more tender and clean. This is well shown on plate 2, where the dead tips a're high, showing conclusively the preference the beetles have for the younger leaves. 'After attaining their growth, the larvae forsake the leaves and may be found crawling along the limbs and trunk. If the tree has comparatively smooth bark, a far greater portion make their way to the ground, in search of proper shelter while passing through the pupa stage, than if a rough bark, which affords. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original New York State Museum; New York State Museum. Albany : New York State Education Dept
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectscience, bookyear1887
