|scientific name Dioryctria pentictonella |
Dry, open pine forest. Preference is shown for young open stands, 1.5-10 m in height.
Adults emerge late spring and fly mid-April to early June.
Wingspan: Forewings with strongly raised scales in basal area, subbasal area, medial area and discocellular spot. Primarily black and white with reddish scales in the basal, subbasal, medial and terminal areas. Male genitalia: Uncus unconstricted and apically rounded. Valve with prominent apical projection and accessory spine. Small teeth present along the costal edge at the base of the apical projection. Vesica with large cornutus and many smaller cornutii. Female genitalia: Ductus bursa heavily sclerotized, equal width along entire length and convered with minute spicules. Forewing coloration highly variable in D. pentictonella, especially throughout California D. pentictonella morphologically similar to D. vancouverella. Degree of reddish scaling and contrast in transverse bands are cited as distinguishing characters (Mutuura, et al 1969) , though a great deal of variation exists hindering identification based solely on morphology.
Adults emerge late spring. Larvae feed on buds of host. Feeding sites identified by bundles of webbing and frass. Multiple broods often occurring in southern localities. Large populations may occur in conifer seed orchards.
Not of concern.
Larvae reared primarily from Pinus ponderosa, though occasionally P. contorta (Mutuura et al 1969).
British Columbia south to California.
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