Author: Publisher:
ISBN:
Category : Scolytus ventralis
Languages : en
Pages : 2
Book Description
Fir Engraver Beetle (Scolytus Ventralis).
Author: The Fir Engraver Beetle
Author: George R. StrublePublisher:
ISBN:
Category : Abies concolor
Languages : en
Pages : 28
Book Description
Fir Engraver Damage in Western Washington
Author: Patrick ShultsPublisher:
ISBN:
Category : Fir
Languages : en
Pages : 5
Book Description
The fir engraver beetle (Scolytus ventralis) can cause significant damage and mortality to conifers in the Abies genus in western Washington. This small insect bores below the bark of trees and feeds on the sugar-rich phloem. In the process, they also cause severe damage to the cambium, the tissue responsible for annual diameter growth. If enough beetles feed on the tree, they will eventually girdle its circumference, cutting off nutrient flow and causing the tree to die. While this beetle is capable of killing trees, in western Washington it behaves as a secondary agent. This means it typically can only establish itself in trees dealing with a preexisting stressor, such as drought or a root disease. When trees are under significant stress, they are less able to defend themselves. Because of this, severe drought conditions in western Washington often correlate with a spike in fir engraver beetle populations. Since climate models predict hotter, drier summers in the coastal northwest, fir engraver damage and mortality may become more commonplace in the years to come.
Stand and Tree Characteristics Influencing Density of Fir Engraver Beetle Attack Scars in White Fir
Author: George T. FerrellPublisher:
ISBN:
Category : Abies concolor
Languages : en
Pages : 16
Book Description
Using Indicator Plants to Assess Susceptibility of California Red Fir and White Fir to the Fir Engraver Beetle
Author: George T. FerrellPublisher:
ISBN:
Category : Abies concolor
Languages : en
Pages : 6
Book Description
Using a Vegetation Drought Index (VDI) for estimating the susceptibility of California red and white firs to the fir engraver beetle (Scolytus ventralis) was evaluated in northern California forests where these true firs (Abies species) occur in mixed conifer and true fir stands. Midway through the summer drought, true fir moisture stress-a known predisposing factor-was highest on sites with highest VDI values (most xeric). In mixed conifer stands, the susceptibility of white firs-as indicated by the mean percentage of their basal area killed annually-was highest on sites with highest VDI values. But in true fir stands, the susceptibility of mixed red and white firs was highest on sites with the lowest VDI values. Regression models with VDI, stand basal area, and percentage of true fir as regressors lacked the required predictive range and precision, suggesting that VDI will likely have to be used in combination with predictors other than, or in addition to, those analyzed.
Stand and Tree Characteristics Influencing Density of Fir Engraver Beetle Attack Scars in White Fir
Author: George T. FerrellPublisher:
ISBN:
Category : Abies concolor
Languages : en
Pages : 582
Book Description
Circular
Author: The Fir Engraver Beetle
Author: Donald Richard OwenPublisher:
ISBN:
Category : Fir
Languages : en
Pages : 4
Book Description
Fir Engraver Beetle
Author: Bark Beetles
Author: Fernando E. VegaPublisher: Academic Press
ISBN: 0124171737
Category : Science
Languages : en
Pages : 641
Book Description
Bark Beetles: Biology and Ecology of Native and Invasive Species provides a thorough discussion of these economically important pests of coniferous and broadleaf trees and their importance in agriculture. It is the first book in the market solely dedicated to this important group of insects, and contains 15 chapters on natural history and ecology, morphology, taxonomy and phylogenetics, evolution and diversity, population dynamics, resistance, symbiotic associations, natural enemies, climate change, management strategies, economics, and politics, with some chapters exclusively devoted to some of the most economically important bark beetle genera, including Dendroctonus, Ips, Tomicus, Hypothenemus, and Scolytus. This text is ideal for entomology and forestry courses, and is aimed at scientists, faculty members, forest managers, practitioners of biological control of insect pests, mycologists interested in bark beetle-fungal associations, and students in the disciplines of entomology, ecology, and forestry. Provides the only synthesis of the literature on bark beetles Features chapters exclusively devoted to some of the most economically important bark beetle genera, such as Dendroctonus, Ips, Tomicus, Hypothenemus, and Scolytus Includes copious color illustrations and photographs that further enhance the content