Published in

Oxford University Press, Journal of Economic Entomology, 3(99), p. 780-789, 2006

DOI: 10.1093/jee/99.3.780

Florida Entomological Society, Florida Entomologist, 4(98), p. 1077-1080, 2015

DOI: 10.1653/024.098.0411

Oxford University Press (OUP), Journal of Economic Entomology, 3(99), p. 780-789

DOI: 10.1603/0022-0493-99.3.780

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Discovery of the firstAximopsis(Hymenoptera: Eurytomidae) Parasitoid of Lepidoptera in Brazil and Notes on Its Biology

This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

Eucalyptus cloeziana F. Muell. (Myrtales: Myrtaceae) and the tropical almond Terminalia catappa L. (Myrtales: Combretaceae) are widely cultivated in urban and forest areas of many countries where biological control is the most-preferred method to control insects. Aximopsis sp. (Hymenoptera: Eurytomidae) is reported for the first time in Brazil in a new group of lepidopteran hosts. Individuals of this species emerged from the pupae of Thyrinteina arnobia arnobia Stoll (Lepidoptera: Geometridae) and Thagona tibialis Walker (Lepidoptera: Lymantriidae) that developed from larvae defoliating E. cloeziana and T. catappa plants on the campus of the Universidade Federal de Viçosa (UFV) in Viçosa, Minas Gerais, Brazil. Aximopsis sp. was identified by comparing it with species of this group as described for the Neotropical region. Voucher specimens were deposited in the Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), France. Twenty new pupae each of Anticarsia gemmatalis Hübner (Lepidoptera: Noctuidae) and Tenebrio molitor L. (Coleoptera: Tenebrionidae) were held individually in test tubes with a drop of honey as food and 3 mated Aximopsis sp. females for 2 d. Aximopsis sp. parasitized 20% of the T. molitor pupae but none of the A. gemmatalis pupae. The duration of the life cycle (egg to adult), parasitism and emergence rates, total individuals emerged from each pupa, sex ratio, length of the body and width of the head capsule, and the longevities of Aximopsis sp. males and females that emerged from parasitized T. molitor pupae were evaluated. The duration of the life cycle of Aximopsis sp. was 14 ± 2 d. An average of 62 ± 5 Aximopsis sp. individuals emerged from each T. molitor pupa, and their sex ratio was 0.96 ± 0.02. The total number of parasitoids that emerged was 248 individuals. Measurements of characters of progeny Aximopsis sp. females (n = 10) and males (n = 5), respectively, were as follows: body length: 3.50 mm (2.40–3.80 mm) and 1.99 mm (1.97–2.02 mm); head capsule width: 0.63 mm (0.58–0.72 mm) and 0.48 mm (0.46–0.51 mm), and longevity: 6 ± 1 d and 4 ± 1 d. These results open prospects for investigations of biological control of pests with this natural enemy. ResumoEucalyptus cloeziana F. Muell. (Myrtales: Myrtaceae) e amendoeira-da-praia, Terminalia catappa L. (Myrtales: Combretaceae), são cultivados em áreas urbanas e florestais de muitos países onde o controle biológico é o método preferido para controlar insetos. Aximopsis sp. (Hymenoptera: Eurytomidae) é relatado pela primeira vez no Brasil em um novo grupo de Lepidoptera hospedeiros. Indivíduos desta espécie emergiram de pupas de Thyrinteina arnobia arnobia Stoll (Lepidoptera: Geometridae) e Thagona tibialis Walker (Lepidoptera: Lymantriidae) que se desenvolveram de lagartas desfolhando plantas de E. cloeziana e T. catappa no campus da Universidade Federal de Viçosa (UFV) em Viçosa, Minas Gerais, Brasil. Aximopsis sp. foi identificado por comparação com espécies desse grupo descritas para a região Neotropical. Espécimes desse inseto foram depositados no Centre de Coopération Internationale en Recherche pour le Développement Agronômica (CIRAD), França. Vinte pupas de Anticarsia gemmatalis Hübner (Lepidoptera: Noctuidae) e vinte de Tenebrio molitor L. (Coleoptera: Tenebrionidae) foram individualizadas em tubos de ensaio com uma gota de mel como alimento e 3 fêmeas de Aximopsis sp. por 2 dias. Aximopsis sp. parasitou 20% das pupas de T. molitor, mas nenhuma de A. gemmatalis. A duração do ciclo de vida (ovo a adulto), taxas de parasitismo e emergência, total de indivíduos emergidos por pupa, razão sexual, comprimento do corpo e a largura da cápsula cefálica e longevidades de machos e fêmeas de Aximopsis sp. que emergiram de pupas parasitadas de T. molitor foram avaliados. A duração do ciclo de vida de Aximopsis sp. foi de 14 ± 2 dias. Uma média de 62 ± 5 indivíduos de Aximopsis sp. emergiu por pupa de T. molitor com razão sexual de 0,96 ± 0,02. O número total de parasitoides emergidos foi de 248. Medidas da progênie de Aximopsis sp. fêmeas (n = 10) e machos (n = 5) foram, respectivamente, de: comprimento do corpo: 3,50 mm (2,40–3,80 mm) e 1,99 mm (1,97–2,02 mm), largura da cápsula cefálica: 0,63 mm (0,58–0,72 mm) e 0,48 mm (0,46–0,51 mm) e longevidade: 6 ± 1 e 4 ± 1 dias. Estes resultados abrem perspectivas para investigações de controle biológico de pragas com este inimigo natural. View this article in BioOne