Biological aspects of Hylesia metapyrrha (Lepidoptera; Saturniidae; Hemileucinae), in laboratory

Abstract

The aim of this work was to study biological aspects and the life cycle of Hylesia Metapyrrha in a laboratory. Laboratorial breeding was made at 25 ± 1 °C, 70 ± 10% UR and 14 hours of photophase, feeding the larvae with guava leaves (Psidium guayava L. -Myrtaceae). Time was evaluated on the days of all the development stages; morphometry was evaluated in millimeters and the pupa's mass in grams. The eggs were disposed in groups and covered by urticating abdominal hair. The incubation period lasted 52 days. The larvae, with gregarious habits, presented background black coloration, yellowish scoli and two orange longitudinal lines above and below the spiracles, during the development which lasted an average period of 74.59 days and went through seven instars. The pre-pupa and the pupa stages lasted on average 8.82 and 50.56 days, respectively; the female pupae presented a duration, weight and size which was significantly bigger. The adult stage lasted on average 5.50 days with periods of pre, post and oviposition of 2.30, 1.90 and 1.00 days, respectively. This study broadens the knowledge of the immature stages, biological, morphological and behavioral aspects, until then restricted to the morphology and to registers of the occurrence of the adult forms.Keywords: Biology, dermatitis, entomology, erucism, lepidopterism.Aspectos biológicos de Hylesia metapyrrha Walker (Lepidoptera; Saturniidae; Hemileucinae), em laboratório Resumo O presente estudo objetivou estudar aspectos biológicos e o ciclo de vida de Hylesia metapyrrha em laboratório. Para tanto, foi realizada uma criação laboratorial a 25 ± 1 °C, 70 ± 20% UR e 14 horas de fotofase, alimentando-se as lagartas com folhas de goiabeira (Psidium guajava L -Myrtaceae). Para todas as fases de desenvolvimento, foram avaliados o tempo em dias, a morfometria em milímetros e, para as pupas, a massa, em gramas. Também foram feitas observações sobre características morfológicas e etológicas. Os ovos, de formato subcilíndrico, são dispostos em grupos e recobertos por cerdas abdominais urticantes, o período de incubação foi de 52,00 dias. As lagartas, de hábito gregário, apresentam coloração de fundo negra, escolos amarelados e duas linhas longitudinais laranja dispostas acima e abaixo dos espiráculos, durante o desenvolvimento que teve um período médio de 74,59 dias, passaram por sete ínstares. As fases de pré-pupa e pupa duraram em média 8,82 e 50,56 dias, respectivamente, sendo que as pupas do sexo feminino apresentaram duração, peso e tamanho significativamente maiores que as dos machos. A fase adulta durou em média 5,50 dias, com períodos de pré, pós e oviposição de 2,30, 1,90 e 1,00 dias, respectivamente. Este estudo amplia os conhecimentos sobre as fases imaturas, aspectos biológicos, morfológicos e comportamentais até então restritos apenas à morfologia e registros da ocorrência das formas adultas.Palavras-chave: Biologia, dermatite, entomologia, erucismo, lepidopterismo.

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.…”

“…The latter has the thorax and dorsum corrugated and rough, similar in appearance to Automeris illustris (Walker, 1855) (SPECHT et al 2006b) and A. naranja Schaus, 1898(SPECHT et al 2007b. It is important to note that the presence of a long cremaster in M. cruenta contrasts with the short cremaster of M. similina and other Hemileucinae (LEMAIRE 2002).…”

“…Incubation generally lasts about two weeks in Hemileucinae, corresponding to approximately 12% of the total development (e.g. LORINI 1999, 2008, SPECHT et al 2006b, 2007b. Longer incubation periods, however, have been recorded for species of Hylesia Hübner, [1820] (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 life cycle of S. molina was 62.9 ± 2.12 days (n = 45), smaller than that obtained in other Saturniidae such as H. metapyrrha with 74.59 days (Specht et al 2007b), A. illustris, Adult. Light-beige colored wings and body ( Fig.…”