Biological aspects of Periga circumstans Walker, 1855 (Lepidoptera: Saturniidae: Hemileucinae) with larvae reared on khaki and mate-plant leaves

Abstract

The goal of the present study was to investigate biological aspects of Periga circumstans Walker, 1855 (Lepidoptera: Saturniidae: Hemileucinae) whose larvae were fed on leaves of khaki-plant (Diospyros khaki Linnaeus - Ebenaceae) and Mate-plant (Ilex paraguariensis Saint Hilaire - Aquifoliaceae) leaves. The biological parameters were obtained from specimens kept under controlled conditions: temperature of 25 ± 1 °C, relative humidity of 70 ± 10%, and photoperiod of 12 hours. For each developmental stage, morphological and ethological parameters are described. The larvae passed through six instars with a growth average rate of 1.4 for each instar. The host plants influenced significantly only the total duration of the larval phase, which was prolonged for larvae fed on khaki-plant leaves. Several aspects related to the morphology and the ethology of P. circumstans are similar to those described for Lonomia obliqua Walker, 1855.O presente estudo objetivou investigar aspectos biológicos de Periga circumstans Walker, 1855 (Lepidoptera: Saturniidae: Hemileucinae) cujas larvas foram alimentadas com folhas de caquizeiro (Diospyros khaki Linnaeus - Ebenaceae) e de erva-mate (Ilex paraguariensis Saint Hilaire - Aquifoliaceae). Os parâmetros biológicos foram obtidos de exemplares mantidos em condições controladas: temperatura de 25 ± 1 °C, umidade relativa de 70 ± 10%, e fotoperíodo de 12 horas. Para cada estágio de desenvolvimento são descritos parâmetros morfológicos e etológicos. As larvas passaram por seis instares larvais e apresentaram uma razão média de crescimento de 1,4. As plantas hospedeiras influenciaram significativamente apenas o período larval, que foi mais prolongado nas larvas que se alimentaram de folhas de caquizeiro. Diversos aspectos relacionados com a morfologia e etologia de P. circumstans são similares aos descritos para Lonomia obliqua Walker, 1855.