. Annual report. New York State Museum; Science -- New York (State); Plants -- New York (State); Animals -- New York (State). 20 m:\v vokk statp: mi'sktm our attention last July, by the reception of a number of gladioli bulbs badly infested with plant lice, although they had been pre- viously fumigated with sulfur. The insect must be exceedingly prolific, since one small box containing about a dozen bulbs had the interstices almost filled with exuviae and plant lice. The presence of large numbers of these insects injures the salability of the bulbs, since it weakens them materially and frequen
. Annual report. New York State Museum; Science -- New York (State); Plants -- New York (State); Animals -- New York (State). 20 m:\v vokk statp: mi'sktm our attention last July, by the reception of a number of gladioli bulbs badly infested with plant lice, although they had been pre- viously fumigated with sulfur. The insect must be exceedingly prolific, since one small box containing about a dozen bulbs had the interstices almost filled with exuviae and plant lice. The presence of large numbers of these insects injures the salability of the bulbs, since it weakens them materially and frequently results in a failure to bloom. This species has caused more or less trouble to some of our growers for the past two or three years, particularly in late winter. Examples of this plant louse were submitted to Mr Pergande, through Dr L. O. Howard, ami by him ]-)ronounced to be an unknown species of aphis. Description. The very young plaqt louse is about .75 mm long, pale yellowish or whitish transparent with an obscure subapical orange band on the abdomen. The antennae are slightly fuscous apically, the tip of the beak, the distal tarsal segments and the cor- nicles being fuscous; the eyes are black. The antennal segments in this stage have the following measurements: Third .21 mm, fourth .06 mm, fifth .141 mm. The cornicles are subcylindric. being .09 X .045 mm. The partly full grown wingless female has the following anten- nal measurements. Third segment .195 mm, fourth A 2 mm, fifth .085 mm, the sixth .415 mm, the cornicles being sub- cylindric. .135 x .06 mm. The full grown wingless female is rather stout, a pale yellowish white, the head dorsally, frequently having a distinct yel- lowish cast and tlie subapical abdominal segments a deeper yellowish cast on the venter. The apex of the third, fourth and fifth antennal segments and the apexes of the tibiae, tarsi and the beak arc fuscous. The cornicles are light fuscous and the eyes black. ]Vingcd female. Length mm. Th
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Keywords: ., boo, bookauthornewyorkstatemuseum, booksubjectnewyorkstatemuseum
