Biologia e tabela de vida de fertilidade de Hypercompe indecisa em dieta artificial

Abstract

Resumo -O objetivo deste trabalho foi estudar a biologia de Hypercompe indecisa e construir a tabela de vida de fertilidade em dieta artifi cial, para criação em laboratório. Foram determinados: duração e sobrevivência das fases de ovo, larva e pupa; número de estádios larvais; razão sexual; peso de pupas; longevidade; fecundidade; e períodos de pré-oviposição e oviposição. Os períodos embrionário, larval e pupal foram de 6, 25,4 e 64,3 dias, com sobrevivência de 92,7, 92 e 71,9%, respectivamente. Foram observados seis estádios larvais com durações variáveis. O peso de pupas foi: 1,04 g para fêmeas e 0,726 g para machos. O ciclo biológico foi de 95,6 dias com sobrevivência total de 61,3%. As fêmeas colocaram, em média, 1.531 ovos durante 8,3 dias, e com um período de pré-oviposição de dois dias. A longevidade média de machos e fêmeas foi de 21,9 e 21,8 dias, respectivamente, e a razão sexual de machos para fêmeas foi 0,54. A espécie H. indecisa aumentou 283 vezes a cada geração, e a duração média de uma geração é de 98 dias, e a razão fi nita de aumento é de 1,0593. A dieta artifi cial utilizada foi adequada para a criação de H. indecisa, em laboratório.Termos para indexação: Arctiidae, bioecologia, praga de fruteiras, praga do milho, técnica de criação. Biology and fertility life table of Hypercompe indecisa on artifi cial dietAbstract -The objective of this work was to study the biology of Hypercompe indecisa and construct a life table of fertility on an artifi cial diet, aiming at insect rearing in the laboratory. The following variables were determined: duration and survival of egg, larval and pupal phases; number of larval stages; sexual ratio; pupal weight; longevity; fecundity; and the period of pre-oviposition and oviposition. The embrionary, larval and pupal phases were 6, 25.4 and 64.3 days, with survival of 92.7, 92 and 71.9%, respectively. Six larval stages with variable durations were observed. Pupal weight was 1.04 g for females and 0.726 g for males. The biological cycle was 95.6 days, with 61.3% total survival. Females laid in average 1,531 eggs, during 8.3 days, with a pre-oviposition period of two days. The average longevity of males and females was 21.9 and 21.8 days, respectively, and the sexual ratio of males to females was 0.54. Increase of H. indecisa was 283 times through each generation, with the generation average duration of 98 days, and the fi nite ratio of increase of 1.0593. The used artifi cial diet was adequate for rearing H. indecisa, in the laboratory.Index terms: Arctiidae, bioecology, fruit tree pest, corn pest, rearing technique. IntroduçãoNa agricultura brasileira, os lepidópteros constituem a ordem de insetos com maior número de espécies nocivas, cuja fase larval pode danifi car todas as partes das plantas cultivadas (Gallo et al., 2002). Pelo menos 21 espécies associadas ao milho (Zea mays L.) são conhecidas, distribuídas nas famílias Cosmopterigidae, Crambidae, Noctuidae, Pyralidae, Saturnidae e Arctiidae, e esta última é representada pela espécie Hypercompe indecisa (Wal...

Diolcogaster choi sp. nov. from Brazil, a new gregarious microgastrine parasitoid wasp (Hymenoptera: Braconidae) reared from Hypercompe cunigunda (Lepidoptera: Erebidae) in Brazil

“…The genus Hypercompe occurs from the USA through the Caribbean to Argentina and Bolivia, and contains 89 species (Vincent and Laguerre, 2014). Hypercompe cunigunda is found from French Guiana, Suriname, Peru, Brazil, Venezuela, Ecuador, Bolivia and Guatemala (Silva et al, 1968;Nava et al, 2008;BoldSystems, 2019) and was described using individuals collected of samples from Paraná, Brazil. Larvae of this species have been recorded feeding on the palm Syagrus romanzoffiana (Cham.)…”

“…In addition, the fruit trees avocado, persimmon, strawberry and peach have been recorded as hosts. Although Hypercompe was reported as a corn pest in 1968 (Silva et al, 1968) little is known about its biology, ecology and biological control (Nava et al, 2008;Gernaat et al, 2016).…”

Life Table Study of Tobacco Caterpillar Spodoptera litura (F.) (Noctuidae: Lepidoptera) on Different Bt Cotton Hybrids During 120-150 DAS (Days after Sowing)

“…Life tables are of a great value in understanding the population dynamics of a species because they provide an integrated view of the biological characteristics of a given population under certain environmental conditions (Coppel and Mertins 1977). Although the present study was conducted under controlled conditions, insects in nature experience adverse biotic and abiotic factors that affect their fitness, so that life table studies are useful in evaluating these eco-logical factors (Nava et al 2008).…”