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   Dendroctonus valens (insect)
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    Details of this species in Carmel
    Status: Native
    Invasiveness: Not invasive
    Occurrence: Present/controlled
    Source: Nowak & McBride 1992
    Arrival Date:
    Introduction:
    Species Notes for this Location:
    Nowak and McBride (1992) sampled Monterey pines Pinus radiata in urban areas in Carmel (California, USA) and in adjacent native stands for symptoms and signs of the red turpentine beetle. Beetle infestations were positively correlated with tree stress and diameter and may relate to prior pitch moth infestation. More beetle attacks occurred in the urban zones than in the natural forest, probably due to the presence of pines with larger diameters and more pruning and wounding than in natural forests. Increased number of beetle attacks on larger trees may be the result of increased host surface area. Larger trees may also be less resistant to beetle attacks due to increased stress or other physical or chemical changes (Nowak & McBride 1992).
    Management Notes for this Location:
    In Carmel (CBD and City Zone), beetle infestations are removed from the tree and infested and adjacent trees sprayed with carbaryl (Sevin). If the beetle attacks are too numerous only spraying is done (G. Kelly Pers. Comm. 1988, in Nowak & McBride 1992). Urbanisation near dense natural forest stands may increase populations of wound-associated pests. Forest managers must recognise the potential of urban forests as a reservoir for certain pest populations, including the red turpentine beetle.
    Location Notes:
    Impacts:
    Ecosystem change: Increasing urbanisation is having a greater impact on natural forest stands and may alter forest insect-pathogen-tree relations (Nowak & McBride 1992).
    Last Modified: 16/02/2009 3:34:24 p.m.


ISSG Landcare Research NBII IUCN University of Auckland