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The coffee berry borer (Coleoptera: Curculionidae): how many instars are there?

Gómez Ruiz, Jaime, 1961-2021 | Chávez Guzmán, Brenda Yaneth [autor/a] | Castillo Vera, Alfredo [autor/a] | Valle Mora, Javier Francisco [autor/a] | Vega, Fernando E [autor/a].
Tipo de material: Artículo en línea Artículo en línea Tema(s): Broca del cafeto | Ciclos vitales (Biología) | Morfología animal | Control biológico de plagasTema(s) en inglés: Coffee berry borer | Life cycles (Biology) | Morphology (Animals) | Pest control biologicalDescriptor(es) geográficos: Región Soconusco (Chiapas, México) Nota de acceso: Disponible para usuarios de ECOSUR con su clave de acceso En: Annals of the Entomological Society of America. volumen 108, número 3 (2015), páginas 311-315. --ISSN: 0013-8746Número de sistema: 6878Resumen:
Inglés

After more than a century since the description of the coffee berry borer, Hypothenemus hampei (Ferrari) (Coleoptera: Curculionidae), and dozens of scientific articles on the basic biology of the insect, there is still debate on the number of female larval instars. This article analyzes the metamorphosis of H. hampei females through direct observations during its entire biological cycle in the laboratory, together with scanning electron microscope photos. Also, the size of the head capsule of wild larvae and prepupae was analyzed with Dyar's rule and a discriminant analysis was conducted. Only two instars were observed during H. hampei metamorphosis up to the adult stage. Contrasting morphological changes in the larvae occurred when they transformed into prepupae, with no previous ecdysis. The statistical analysis revealed that the width of the cephalic masses form two significantly distinct groups before transformation into pupa, confirming that the prepupal stage forms part of the second larval instar.

Recurso en línea: http://aesa.oxfordjournals.org/content/aesa/early/2015/03/18/aesa.sav009.full.pdf
Lista(s) en las que aparece este ítem: Dr. Jaime Gómez Ruíz | Bibliografía DEAMP
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Disponible para usuarios de ECOSUR con su clave de acceso

After more than a century since the description of the coffee berry borer, Hypothenemus hampei (Ferrari) (Coleoptera: Curculionidae), and dozens of scientific articles on the basic biology of the insect, there is still debate on the number of female larval instars. This article analyzes the metamorphosis of H. hampei females through direct observations during its entire biological cycle in the laboratory, together with scanning electron microscope photos. Also, the size of the head capsule of wild larvae and prepupae was analyzed with Dyar's rule and a discriminant analysis was conducted. Only two instars were observed during H. hampei metamorphosis up to the adult stage. Contrasting morphological changes in the larvae occurred when they transformed into prepupae, with no previous ecdysis. The statistical analysis revealed that the width of the cephalic masses form two significantly distinct groups before transformation into pupa, confirming that the prepupal stage forms part of the second larval instar. eng

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