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   Dendroctonus valens (insect)
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    Details of this species in Sierra Nevada
    Status: Native
    Invasiveness: Not invasive
    Occurrence: Established
    Source: Owen Wood & Parmeter 2005
    Arrival Date:
    Species Notes for this Location:
    The red turpentine beetle is very common on Monterey pines Pinus radiata planted in urban landscapes and highway corridors within about 160 kilometers of the California coast. It is prevalent on most pines that grow in the Sierra Nevada, particularly on pines damaged by wildfire.

    Healthy pines often survive attacks by a few individuals. Prominent pitch tubes on the lower trunk of standing trees or stumps of recently cut trees nearly always indicate the presence of the red turpentine beetle (Seybold, Paine & Dreistadt 2008).

    Management Notes for this Location:
    Research into the host orientation and colonisation behavior of the red turpentine beetle was conducted in Sierra Nevada (USA) The results indicated that more red turpentine beetles are attracted to wounded trees, including pines infested with black stain root disease Leptographium wageneri var. ponderosum, than to unwounded trees. Beetle infestations were identified by the presence of pitch tubes. Trees with the most D. valens pitch tubes had the greatest likelihood of being diseased and a significantly higher mortality rate. Infection by L. wageneri was confirmed for most of the trees that died, and death did not typically occur without mass attacks by the western pine beetle or the mountain pine beetle (Owen Wood & Parmeter 2005).
    Red turpentine beetles usually infest pine that are aged or stressed by unfavorable growing environments, injuries or inappropriate care. To avoid bark beetle infestations one should ensure that planted pines receive proper care and a good growing environment to reduce tree stress (Seybold, Paine & Dreistadt 2008).
    Location Notes:
    Last Modified: 16/02/2009 3:34:24 p.m.

ISSG Landcare Research NBII IUCN University of Auckland