Ponderosa Pine Mortality Resulting from a Mountain Pine Beetle Outbreak

Ponderosa Pine Mortality Resulting from a Mountain Pine Beetle Outbreak
Author: William F. McCambridge
Publisher:
Total Pages: 12
Release: 1982
Genre: Mountain pine beetle
ISBN:

From 1965 to 1978, mountain pine beetles killed 25% of the pines taller than 4.5 feet in a study area in north-central Colorado. Average basal area was reduced from 92 to 58 square feet per acre. Mortality increased with tree diameter up to about 9 inches d.b.h. Larger trees appeared to be killed at random. Mortality was directly related to number of trees per acre and presence of dwarf mistletoe, but not to site index, elevation, and percent Douglas-fir in the stand.

Dwarf Mistletoes

Dwarf Mistletoes
Author: Frank G. Hawksworth
Publisher: DIANE Publishing
Total Pages: 427
Release: 1998-04
Genre:
ISBN: 0788142011

Contents: generalized life cycle; sexual reproductive biology; mechanism and trends of evolution; biogeography and paleogeographic history; host relationships; ecological relationships; biotic associates; host-parasite physiology; anatomy of the dwarf mistletoe shoot system; endophytic system; pathogenic effects; control; systematics: philosophy, problems, and criteria for classification; molecular systematics; formal taxonomy. Extensive bibliography. Scientific and common names; collecting and curating techniques; herbaria consulted; specimens examined; glossary; subject and species indexes.

Western Dwarf Mistletoe Infects Understory Jeffrey Pine Seedlings on Cleveland National Forest, California

Western Dwarf Mistletoe Infects Understory Jeffrey Pine Seedlings on Cleveland National Forest, California
Author: Robert F. Scharpf
Publisher:
Total Pages: 2
Release: 1986
Genre: Arceuthobium
ISBN:

Many young, understory Jeffrey pines (Pinus jefreyi Grev. & Balf.) were found to be infected by western dwarf mistletoe (Arcerrthobium cantpylopodurn Engelm.) on Laguna Mountain, Cleveland National Forest, in southern California. Under heavily infected overstory, about three-fourths of the young pines (about 15 years old on the average) were infected by dwarf mistletoe. Infections per tree averaged about two and a half, two-thirds of these on the bole. Attempts to regenerate Jeffrey pine under an infected overstory in southern California will probably lead to a severely infected and damaged understory. Planting nonhost species or resistant selections of Jeffrey pine would be practical in managing dwarf mistletoe on these highly valuable forest recreational areas.