Title: Cultural practices for prevention and control of mountain pine beetle infestations
Author: Fettig, Christopher J.; Gibson, Kenneth E.; Munson, A. Steven; Negrón, Jose F.
Source: For. Sci. http://dx.doi.org/10.5849/forsci.13–032
Description: In recent years, the mountain pine beetle, Dendroctonus ponderosae Hopkins, has impacted >8.9 million hectares of forests in the western U.S. During endemic populations, trees weakened by other agents are often colonized by D. ponderosae, but may be difficult to detect due to their scarcity. Once populations reach incipient levels, tree defenses are often insufficient in deterring mass attacks, and populations rapidly increase causing substantial levels of tree mortality under certain circumstances. There are two general approaches for reducing the negative impacts of D. ponderosae on forests. Direct control involves short-term tactics designed to address current infestations by manipulating beetle populations, and includes the use of fire, insecticides, semiochemicals, sanitation harvests, or a combination of these treatments. Indirect control is preventive, and designed to reduce the probability and severity of future infestations by manipulating stand, forest and/or landscape conditions by reducing the number of susceptible host trees through thinning, prescribed burning, and/or alterations of age classes and species composition. We review tree, stand, and landscape factors associated with D. ponderosae infestations, and analyze the effectiveness of treatments for preventing and mitigating undesirable levels of tree mortality. We describe the current state of our knowledge and identify gaps for making informed management decisions.
Keywords: Dendroctonus ponderosae, direct control, indirect control, Pinus contorta, Pinus ponderosa
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Fettig, Christopher J.; Gibson, Kenneth E.; Munson, A. Steven; Negrón, Jose F. 2013. Cultural practices for prevention and control of mountain pine beetle infestations. For. Sci. http://dx.doi.org/10.5849/forsci.13–032
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