Reproduction of Trichospilus diatraeae (Hymenoptera: Eulophidae) in the pupae of Diaphania hyalinata (Lepidoptera: Crambidae) of various ages

Carregando...
Imagem de Miniatura

Data

2015-12-01

Autores

Da Silva, Isabel Moreira
Zanuncio, Teresinha Vinha
Pereira, Fabricio Fagundes
Wilcken, Carlos Frederico [UNESP]
Serrao, Jose Eduardo
Zanuncio, Jose Cola

Título da Revista

ISSN da Revista

Título de Volume

Editor

Florida Entomological Soc

Resumo

Trichospilus diatraeae Cherian & Margabandhu (Hymenoptera: Eulophidae) is a gregarious parasitoid of a wide variety of lepidopterans including melonworm, Diaphania hyalinata L. (Lepidoptera: Crambidae), pupae in the field. The latter is a key pest of Cucurbitaceae; it primarily damages their leaves and secondarily their fruit, and it reduces the productivity of the plants. The aim of this study was to determine the effect of the age of D. hyalinata pupae on the development of T. diatraeae. Diaphania hyalinata pupae aged 24, 48, 72, 96, 120, and 144 h were individualized and exposed to eight 48-h-old T. diatraeae females for 24 h. The emergence and parasitism rates, sex ratios, and longevities of T. diatraeae males and females were found to be similar with D. hyalinata pupae of different ages. The number of progeny, width of the head capsule, and duration of the life cycle (egg to adult) of T. diatraeae decreased with the increasing age of D. hyalinata pupae. Importantly, the number of parasitoid progeny per host pupa and size of the parasitoid adults were larger when 24-h-old host pupae were parasitized than when 48- to 144-h-old pupae were parasitized. Trichospilus diatraeae was very effective in parasitizing D. hyalinata pupae of ages ranging from 24 to 144 h.

Descrição

Palavras-chave

host pupa age, oviposition, host quality

Como citar

Florida Entomologist. Lutz: Florida Entomological Soc, v. 98, n. 4, p. 1025-1029, 2015.