. Cooperative economic insect report. Beneficial insects; Insect pests. - 300 - needles, a single one settling on each needle and giving rise to a colony of young which repeat the process. Where the apterous mother feeds, a yellow spot occurs; sometimes with a reddish tinge which later darkens. When two or three of these spots are present on old trees,the needles are killed, while with young aphids, feeding seldom completely kills the needles. This aphid does not seem to attack new growth except in the autumn and winter, and the pest is very sluggish in both the alate and apterous forms. Descr
. Cooperative economic insect report. Beneficial insects; Insect pests. - 300 - needles, a single one settling on each needle and giving rise to a colony of young which repeat the process. Where the apterous mother feeds, a yellow spot occurs; sometimes with a reddish tinge which later darkens. When two or three of these spots are present on old trees,the needles are killed, while with young aphids, feeding seldom completely kills the needles. This aphid does not seem to attack new growth except in the autumn and winter, and the pest is very sluggish in both the alate and apterous forms. Description: APTEROUS VIVPAROUS FEMALE - General color yellowish-green to green. Head yellowish-green to fawn colored, with 2 foveae. Eyes dull red. Antennae about half length of body, pale yellowish-green, darker at tips. Legs green, with tarsi, tips of femora and tibiae dusky. Cornicles pale green, with dusky tips; long and slender, about one-fourth the length of body. Abdomen rounded, longer than wide; a dark line on each side. Cauda green, long, sharply tapering and constricted toward the base. Length of body about mm., width about mm. Cornicles about mm. long. Cauda 0. 22 mm. long. ALATE VIVIPAROUS FEMALE - General color of head and thorax light brown; abdomen bright green, with four rows of dark spots, one row extending in a slight curve on each side of the median line and the others extending along sides of abdomen. Eyes deep red. Antennae nearly as long as body, yellowish-green at base and dusky green at tips. Legs pale green, tips of tibiae and tarsi dusky. Cornicles pale green to dusky, cylindrical, reaching to tip of long and sharply tapering cauda. Cauda pale green. First antennal segment strongly gibbous; third roughened and with 9-12 sensoria, some as wide as the segment itself; fourth segment has about 4 sensoria; fifth has one sensorium;and sixth antennal segment has usual sensorium at base of unguis. Wings have very variable venation, median vein somet
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