Life history of a ponderosa pine coneworm, Dioryctria auranticella (Lepidoptera: Pyralidae)

Dioryctria auranticella (Grote), a coneworm that infests ponderosa pine, Pinus ponderosa Douglas ex P. Lawson and Lawson, and Austrian pine, P. nigra Arnold, in southeastern Nebraska is univoltine. Head capsule measurements indicate five instars. First instars apparently overwinter in hibernaculae....

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Veröffentlicht in:	Journal of economic entomology 1989-06, Vol.82 (3), p.879-885
Hauptverfasser:	Pasek, J.E. (Rocky Mountain Forest and Range Experiment Station, USDA-Forest Service, Lincoln, Nebraska), Dix, M.E
Format:	Artikel
Sprache:	eng
Schlagworte:	AGENTES NOCIVOS Biological and medical sciences CICLO VITAL Control CYCLE DE DEVELOPPEMENT DIORYCTRIA FACTEUR NUISIBLE Fundamental and applied biological sciences. Psychology Generalities LARVAS LARVE Lepidoptera NEBRASKA OVULE OVULO PARASITISME PARASITISMO Phytopathology. Animal pests. Plant and forest protection PINUS PINUS PONDEROSA PINUS RADIATA Protozoa. Invertebrates PUPAS PUPE Pyralidae Records, symptoms, damages, economic importance, population surveys
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Beschreibung
Zusammenfassung:	Dioryctria auranticella (Grote), a coneworm that infests ponderosa pine, Pinus ponderosa Douglas ex P. Lawson and Lawson, and Austrian pine, P. nigra Arnold, in southeastern Nebraska is univoltine. Head capsule measurements indicate five instars. First instars apparently overwinter in hibernaculae. Second and third instars feed in male and female pine flowers during early May. Fourth and fifth instars tunnel in second-year cones for about 2-3 wk between mid-May and mid-June and often require two cones to complete development. Larvae pupate within cones during June, and adults are active from mid-June to late July. At 26 degrees C, eggs hatch in 6-9 d. Ichneumon brunneri Rohwer was the most abundant of eleven parasite species reared from cones damaged by D. auranticella
ISSN:	0022-0493 1938-291X
DOI:	10.1093/jee/82.3.879