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REPRODUCTIVE BIOLOGY OF LAMBDINA FISCELLARIA LUGUBROSA (LEPIDOPTERA: GEOMETRIDAE)1

  • D. P. Ostaff (a1), J. H. Borden (a1) and R. F. Shepherd (a2)

Abstract

Calling by newly emerged female Lambdina fiscellaria lugubrosa (Hulst) began the first evening and commenced 15 h after the onset of light in nature and in a 14L:10D photoperiod regime in the laboratory. Copulation began 0.5 to 1.5 h later, and moths remained in copulation an average of 3.45 h. The internal reproductive system is typical of ditrysian-type Lepidoptera. Mating usually resulted in the transfer of a single, spheroid spermatophore with a long collum. The spermatophore was placed in the bursa copulatrix in such a position that spermatozoa could leave through the aperture into the ductus seminalis. The greatest mating success occurred between 2- to 4-day-old males and females up to 4 days old. Maximum oviposition occurred on the day after mating. Numbers of eggs maturing and being laid were increased after mating. Mean longevity of mated and unmated females in the laboratory was 18.1 and 20.8 days, respectively. Mating success was greatest at a 6:1 male to female sex ratio, and progressively less at a 1:1 and 1:6 sex ratio. Males mated only once in a 24-h period, but were capable of multiple mating. Females usually accepted one spermatophore but occasionally up to three were found.

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REPRODUCTIVE BIOLOGY OF LAMBDINA FISCELLARIA LUGUBROSA (LEPIDOPTERA: GEOMETRIDAE)1

  • D. P. Ostaff (a1), J. H. Borden (a1) and R. F. Shepherd (a2)

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