Photochemical oxidant injury and bark beetle coleoptera scolytidae infestation of ponderosa pine. I. Incidence of bark beetle infestation in injured trees

Journal Article · Wed May 01 00:00:00 EDT 1968 · Hilgardia; (United States)

DOI:https://doi.org/10.3733/hilg.v39n06p121· OSTI ID:6229122

Stark, R W; Miller, P R; Cobb, Jr, F W; Wood, D L; Parmeter, Jr, J R

A total of 107 beetle-killed and 963 nearest-neighbor ponderosa pines were examined to determine the association between severity of atmospheric pollution injury and infestation by bark beetles. Trees exhibiting advanced symptoms of pollution injury were most frequently infested by the western pine beetle, Dendroctonus brevicomis, and the mountain pine beetle, D. ponderosae. The degree of injury and incidence of bark beetle infestation were not related to total height, diameter, length of live and dead crown or crown class. As severity of oxidant injury increased, live crown ratio decreased and incidence of bark beetle infestation increased. One hundred noninfested trees in each of three disease categories, advanced, intermediate, and healthy, were examined for evidence of prior beetle attacks. Thirty-six percent of the advanced-diseased trees versus only 5% of the healthy trees were attacked. Thus, the beetles may discriminate between healthy and diseased trees at a distance, upon contact with the host, or both. These studies indicate strongly that atmospheric pollution injury predisposes ponderosa pine to bark beetle infestations. 3 references, 7 tables.

• OSTI ID: 6229122
• Journal Information: Hilgardia; (United States), Journal Name: Hilgardia; (United States) Vol. 39:6; ISSN HILGA
• Country of Publication: United States
• Language: English

Related Subjects

560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AIR POLLUTION
ANIMALS
ARTHROPODS
BARK
BEETLES
BODY
COLEOPTERA
CONIFERS
DATA
EXPERIMENTAL DATA
INFECTIVITY
INFORMATION
INSECTS
INVERTEBRATES
NUMERICAL DATA
PHOTOCHEMICAL OXIDANTS
PINES
PLANT DISEASES
PLANT TISSUES
PLANTS
POLLUTION
SENSITIVITY
SYMPTOMS
TISSUES
TOXICITY
TREES