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Acta Amazonica

Print version ISSN 0044-5967On-line version ISSN 1809-4392

Acta Amaz. vol.32 no.1 Manaus Jan./Mar. 2002

http://dx.doi.org/10.1590/1809-43922002321132 

ZOOLOGIA

Biologia e controle microbiano de Urbanus acawoios (Williams, 1926) (Lepidoptera: Hesperiidae): I. descrição morfológica e aspectos Bio-ecológicos

Biology and Microbial Control of Urbanus acawoios (Williams, 1926) (Lepidoptera: Hesperiidae): I. Bio-ecological Informations

Manoel Dias NOGUEIRA1 

Mohamed Ε. Μ. HABIB2 

1 ϯ "In memoriam" - Instituto Nacional de Pesquisas da Amazônia - INPA, Manaus - AM.

2 IB - Zoologia -Universidade Estadual de Campinas - UNICAMP - Campinas - SP. O segundo autor deste trabalho deixa registrado, aqui, a saudade que os entomólogos e demais pesquisadores do INPA sentem pelo falecimento precoce do primeiro autor, o jovem Manoel Dias Nogueira.

RESUMO

Devido aos danos dos ataques de Urbanus acawoios (Williams, 1926) (Lepidoptera: Hesperiidae) em palheteiras (Clitoria racemosa) (Leguminosae) em Manaus, AM e a total ausência de qualquer informação a respeito desta espécie, o presente trabalho foi desenvolvido visando a obtenção de conhecimentos que facilitem a identificação de métodos seguros e eficientes para o seu controle. Os estudos biológicos revelaram que este inseto é multivoltino, tendo duração média de 41,89 ± 0,98 dias por geração. As condições climáticas na cidade de Manaus, a disponibilidade de alimentos, e possivelmente a ausência de inimigos naturais eficientes, parecem ser os fatores principais responsáveis pela ocorrência de erupções populacionais desta espécie. Enquanto o estágio larval consiste de 5 fases (ínstares) e dura em média 18,46 ± 1,28 dias, o da pupa necessita 9,96 ± 1,05, e o adulto 13,47 ± 0,27 dias, sob condições de 30°C e 85% UR. Estudos morfológicos foram incluídos.

Palavras-Chave: Biologia; Surto populacional; Urbanus acawoios; Amazônia brasileira

ABSTRACT

Due to the lack of informations concerning Urbanus acawoios (Williams, 1926) (Lepidoptera: Hesperiidae), and the severe damage caused by it in Clitoria racemosa trees in Manaus, AM, the present research was conducted, under semi-natural conditions, in order to obtain data about its biology and development. The occurrence of phytophagous pests in urban environments, in addition to causing troubles and problems, it needs special control methods, at least safety for the public health. Three consecutive generations were studied in the present work. As a multivoltine insect, the whole life cycle was observed to vary between 36 and 50 days, with an average of 41.89 ± 0.98 days. The oviposition behaviour, as well as the egg morphology were described. The embryonic development lasted between 3 and 4 days. External and internal alterations during the egg development were determined. The initial larval instars showed to be of aggregated habit, while the others were solitary. The larval stage, consisting of 5 instars, lasted an average of 18.46 ± 1.28 days, with a minimum of 19 and a maximum of 26 days. The biology of each instar and its duration time were also determined. The mid-gut pH of the larval stage varied between 8.4 and 9.2, with an average of 8,7. The pupal stage lasted an average of 9.96 ± 1.05 , with a minimum of 8 and a maximum of 12 days for its development. The mated adult longevity varied between 9 and 22 days, with an average of 13.47 ± 0.27 days.

Key words: Biology; Outbreaks; Urbanos acawoios

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