Comparison of Biology between Helicoverpa zea and Helicoverpa armigera (Lepidoptera: Noctuidae) Reared on Artificial Diets

The objective of this study was to compare growth and development of Helicoverpa zea Boddie and Helicoverpa armigera Hübner (Lepidoptera: Noctuidae) larvae that were feeding on an artificial diet. Neonate larvae of H. zea and H. armigera were collected in maize fields cultivated at the Brazilian Agr...

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Published in:The Florida entomologist 2016-03, Vol.99 (1), p.72-76
Main Authors: Barbosa, Tatiane Aparecida Nascimento, Mendes, Simone Martins, Rodrigues, Geovane Teixeira, Ribeiro, Paulo Eduardo de Aquino, Santos, Christiane Almeida dos, Valicente, Fernando Hercos, Oliveira, Charles Martins de
Format: Article
Language:English
Subjects:
adaptation index
Artificial diets
Biomass
Body length
bollworm
Comparative analysis
Corn earworm
Cotton
cotton earworm
Entomology
gusano
gusano bellotero
gusano del algodón
gusano elotero del maíz
Insect larvae
Insect pests
Instars
Larval development
Old World bollworm
oruga polífaga
Pests
polyphagous caterpillar
RESEARCH PAPERS
índice de adaptación
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Summary:The objective of this study was to compare growth and development of Helicoverpa zea Boddie and Helicoverpa armigera Hübner (Lepidoptera: Noctuidae) larvae that were feeding on an artificial diet. Neonate larvae of H. zea and H. armigera were collected in maize fields cultivated at the Brazilian Agricultural Research Corporation, Embrapa Maize & Sorghum, in Sete Lagoas (Minas Gerais) and in farmers' cotton fields in Luís Eduardo Magalhães (Bahia), respectively. Bioassays were conducted in the laboratory using individual larvae in 50 mL plastic cups fed a white bean—based artificial diet and maintained at a temperature of 26 ± 2 °C and a relative humidity of 47 ± 10%. The following larval biological parameters were evaluated: number and duration of instars, survival of larval instars and pupae, larval biomass, larval head capsule size, and larval length. An adaptation index was computed for comparison of development of the 2 species. Significant differences were observed between the species for all variables except for the number of instars and pupal survival. Although H. armigera larvae developed faster and were smaller than H. zea larvae, the diet tested can be considered adequate for rearing both species in the laboratory.
ISSN:0015-4040
1938-5102
DOI:10.1653/024.099.0113