Report of the State Entomologist on Injurious and Other Insects of the State of New York, Volumen12University of the State of New York, 1897 |
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Términos y frases comunes
abdomen abundant Agricul Agricultural Albany Amer antennæ appearance army-worm asparagus asparagus beetle attack August badly infested Balaninus bark blister beetle borer brief account brood Bull burrows Canad caterpillars chambers chestnuts Cicada cited cocoon COLEOPTERA Country Gentleman Crioceris crop destructive Diptera distribution Divis dorsal eggs elm-leaf beetle elms English elms Entomol Entomolog Entomologist Experiment Station Expt Fabr feeding female figured Fitch Formica rufa fungus Galerucella galls Gossyparia habits hibernate imago inch infested trees injuries insect July June known large numbers larva larvæ leaf leaves length Lepidoptera Leucania unipuncta life-history Linn LINTNER localities longitudinal male maple molt mosquito moth Myriapoda natural nearly observed occur Odontota dorsalis oviposition parasites Paris green Pemphigus pest plates portion probably proboscideus pupa pupæ pupation ravages rectus referred remedies Rept Riley Saperda Sciara segment setæ species spraying Stat thorax tibiæ twigs U. S. Dept vicinity wings worm York State Museum
Pasajes populares
Página 245 - ... pale dorsal corneous transversely oblong shield, being about twothirds as long as wide, and nearly as long as the four succeeding segments; this plate is smooth, except on the posterior half, which is rough, with the front edge irregular and not extending far down the sides. Fine hairs arise from the front edge and side of the plate, and similar hairs are scattered over the body and especially around the end. On the upper side of each segment is a transversely oblong ovate roughened area, with...
Página 245 - The larva is white, subcylindrical, a little flattened, with the lateral fold of the body rather prominent; end of the body flattened, obtuse, and nearly as wide at the end as at the first abdominal ring. The head is one-half as wide as the prothoracic ring, being rather large. The prothoracic segment, or that next to the head, is transversely oblong, being about twice as broad as long ; there is a pale dorsal corneous transversely oblong shield, being about two-thirds as long as wide, and nearly...
Página 239 - ... for about two-thirds of their length are black, the remaining third is yellow, and they are ornamented with bands and spots arranged in the following manner : a yellow spot on each shoulder, a broad, yellow, curved band or arch, of which the yellow scntel...
Página 248 - ... of the branches. Working on these observations, M. Robert had strips of about two inches wide cut out of the bark from the large boughs down the trunk to the ground, and it was found that where the young bark pressed forward to heal the wound and a vigorous flow of sap took place many of the maggots near it were killed, the bark which had not been entirely undermined was consolidated and the health of the tree was improved. Working on from this, M. Robert tried the more extended treatment of...
Página 245 - Sfagdalis armicollis, from which multitudes of imagos of this species emerged during this spring, it is impossible to say that some or most of this small number of parasites may not have escaped from the latter species. From the present appearance of the elms throughout the towns of Central Illinois where I have had an opportunity to examine their condition, and from the rapid progress which this pest has made among them during the last two or three years, it seems extremely likely that it will totally...
Página 244 - The trees were found to have suffered terribly from the ravages of these insects. Several of them had already been cut down, as past recovery; others were in a dying state, and nearly all of them were more or less affected with disease or premature decay.
Página 216 - Jane 9, fifteen days after entering the papal state, the first moth emerged. It was small, with a peculiar hopping flight, the forewing mottled black and white, and the hind wing more uniform in color, dusky, and slightly spotted with black near the tip. It appears as if the second stage in the life of this insect is that in which it most frequently falls a prey to its foes. During its earliest existence it is sheltered in the tunnel it has bored in the stalk, and there seems no cause but the want...
Página 221 - The larva when full grown measures about half an inch in length. It is almost cylindrical, sixteen-footed, of a very pale green color, divided into fourteen segments by rather deep wide transverse constrictions. It has two rows of elevated white spots along the back. and one along each side, each segment having one spot in each row, or four spots in all, and between the spots is a smaller white elevated dot, and another similar dot below the lower spots. From each of these elevated spots and dots...
Página 322 - ... arms and legs that it literally burst. Those who have traveled in summer on the lower Mississippi or in the North-west, have experienced the torment which these frail flies can inflict; at times they drive everyone from the boat, and trains can sometimes only run with comfort on the Northern Pacific by keeping a smudge in the baggage car and the doors of all the coaches open to the fumes.
Página 250 - It measures, when extended, three-tenths of an inch (8 mm.), being of about the same proportions as the larva of the common species, but is readily separable by its orange color. The ground color is light yellowish cream with an overlay of ochraceous orange which is most pronounced on the exterior portions of the abdominal segments. The head, with the exception of the mouth-parts, is also ochraceous, the thoracic plate is prominent, divided into two parts, and is of a dark-brown color. Enlarged figures...