2001
DOI: 10.1590/s0034-71082001000100016
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Characterization of the larval stages of Alphitobius diaperinus (Panzer) (Coleoptera: Tenebrionidae) using head capsule width

Abstract: The mean width (n = 5) of the cephalic capsule instar of Alphitobius diaperinus was determined. The larvae were reared at 27ºC (+ 0.1ºC). The result showed that A. diaperinus has eight larval instars. The head capsule of the 1 st instar larvae measured x = 0.228 (SD = 0.0192) and the last instar larval measured x = 1.339 (SD = 0.0436). The developmental rate, determined by Dyar-Hutchinson's rule, was 1.29. These data may be useful for studies on phenology and age structure of A. diaperinus in the field.Key wor… Show more

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Cited by 22 publications
(20 citation statements)
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“…Ten stage IV or VI larvae were placed in each container, fed ad libitum and kept in an incubator under the same conditions as the colony was maintained. The larval stages were determined based on the head capsule width . During the developmental period, body weight gain and survivability of the larvae were recorded at 1 week intervals.…”
Section: Methodsmentioning
confidence: 99%
“…Ten stage IV or VI larvae were placed in each container, fed ad libitum and kept in an incubator under the same conditions as the colony was maintained. The larval stages were determined based on the head capsule width . During the developmental period, body weight gain and survivability of the larvae were recorded at 1 week intervals.…”
Section: Methodsmentioning
confidence: 99%
“…A. diaperinus were reared in plastic boxes containing chicken feed (Avigan Ò ) at 25°C at the Entomology Laboratory of the Facultad de Ciencias Agrarias (Universidad Nacional del Litoral). Fifth-and seventh-instar larvae (L5 and L7, respectively) were morphologically differentiated following the procedures described by Francisco and do Prado (2001). At the time of the experiments, L5, L7 and adults were approximately 26, 34 and 40 days old, respectively.…”
Section: Study Materialsmentioning
confidence: 99%
“…The mean head capsule width of the late instars (n = 10) used in this study was 1.084 (± 0.013) mm and ranged from 0.960 to 1.320 mm; representing 7th to 9th instar. Barké and Davis [17] reported head capsule widths of 0.95, 1.08, and 1.28 mm, and Francisco and Prado [20] reported widths of 1.061, 1.208, and 1.339 mm for 7th, 8th, and 9th instars, respectively. Overall measurements of the alimentary canal and its sections resemble those reported by McAllister et al [13] for fully tanned adults and 8th-to 11th-instar larvae.…”
Section: Resultsmentioning
confidence: 99%