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Filtering by: Subject Douglas fir -- Fertilizers Committee Member Berry, R. E. Subject Douglas fir -- Diseases and pests

The root insect-- black-stain root disease association in Douglas-fir : vector relationships and implications for forest management

Creator:

Witcosky, Jeffrey John

Abstract:

Verticicladiella wageneri Kendrick is a vascular wilt pathogen of conifers, causing a black staining of colonized sapwood of roots and lower stem. In Douglas-fir, V. wageneri is intimately associated with insects. Hylastes nigrinus, Pissodes fasciatus, and Steremnuis carinatus are commonly associated with diseased hosts, carry inoculum of V. wageneri in...

Resource Type:

Dissertation