Biologia e aspectos morfológicos dos estágios imaturos de Automeris naranja Schaus (Lepidoptera, Saturniidae, Hemileucinae)

Abstract

Este estudo objetivou estudar a biologia e aspectos da morfologia dos estágios imaturos de Automeris naranja Schaus, 1898, um hemileucíneo polifitófago cujas lagartas podem provocar erucismo. Os parâmetros biológicos foram obtidos em condições controladas: temperatura, 25 ± 1ºC; Umidade Relativa, 70 ± 10% de UR e fotofase, 14 horas, com observações diárias. Foram avaliados, em cada fase de desenvolvimento, aspectos morfológicos e etológicos, duração e viabilidade. Para relacionar as plantas hospedeiras foram reunidos dados já referidos em bibliografia e de material coletado em campo. O ciclo de vida foi de 128 dias, cujos períodos médios das fases de ovo, lagarta, pupa e adulta foram de 14,89; 69,00; 35,19 e 7,61, respectivamente. As lagartas passaram por seis ínstares e tiveram uma razão média de crescimento de 1,46. Observou-se um alto grau de polifitofagia sendo relacionadas 61 plantas hospedeiras pertencentes a 26 famílias. O potencial biótico foi estimado em 1195606,994 indivíduos ao ano.

Biology and morphology of Molippa cruenta (Lepidoptera: Saturniidae) in the laboratory

“…II) with mean growth rate of 1.459 suggests mean growth rates that are close to each other, around 1.4 for each instar in the Hemileucinae. This is consistent with predictions based on the rule of DYAR (1890), and similar to results obtained with representatives of Automeris Hübner, [1819] (SPECHT et al 2006b(SPECHT et al , 2007b and Hylesia (SPECHT et al 2006a(SPECHT et al , 2007a.…”

“…Longer incubation periods, however, have been recorded for species of Hylesia Hübner, [1820] (e.g. SANTOS et al 1988, 1996, SPECHT et al 2006a, 2007a. Eggs of some species in this genus experience diapause and, unlike the eggs of M. cruenta, are normally covered with urticant setae from the female abdomen, which confer some protection against predators and parasitoids (e.g.…”

Biological and morphometric aspects and rearing of Syssphinx molina (Cramer) (Lepidoptera: Saturniidae), a defoliator of parica tree

“…Five instars were observed in S. molina, similar to other Saturniidae such as Philosamia ricini (Drury) (Santos et al 2000) and Rothschildia jacobaeae (Walker) (Urban and Oliveira 1972), however different from Automeris naranja Schaus (Specht et al 2007a) and A. illustris (Walker) (Specht et al 2006), both with six instars and Hylesia metapyrrha (Walker) with seven (Specht et al 2007b).…”

“…The average duration of larval stage was 31.1 ± 5.22 days. The larval survival rate was only 38.4% considered low compared with other Saturniidae such as 95.6% in A. naranja (Specht et al 2007a), 82% in E. i. magnifica and 88% in D. rosacordis (Zanuncio et al 1993). The diet consisted solely of parica tree leaflets probably caused the low survival rate despite its daily replacement due to the rapid wilting of the leaves after collection.…”

“…with 7.6 (Specht et al 2007a) and Citheronia brissotii brissotii (Boisduval) at nine days (Fronza et al 2005). The sex ratio of 0.5 was similar to that obtained for A. illustris of 0.505 (Specht et al 2006).…”