Author: FRICK KENNETH E.
Publisher: Entomological Society of America
ISSN: 1938-2901
Source: Annals of the Entomological Society of America, Vol.63, Iss.1, 1969-01, pp. : 184-187
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Abstract
Studies were made on the ovipositional behavior of Hylemya seneciella (Meade), an anthomyiid fly the larvae of which feed on tansy ragwort, Senecio jacobaca L., to facilitate the spread of this introduced fly as a biological control. Ovipositing females showed a significant preference for 4-mm-diameter spheres over spheres that were 5 or 6 mm diameter. Spheres 3 or 7 mm diameter were less acceptable, and spheres 1, 2, and 8 mm diameter were unsatisfactory. However, the preference of ovipositing females for spheres or cubes 4 or 5 mm diameter did not differ significantly. Yellow and orange were equally attractive; green, red, and white were less so; and blue was the least attractive. Attempts to mate caged adults 1–13 days old failed under varying light period and intensity, even in the presence of S. jacobaca buds.
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