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Physiological Differences Between Lodgepole Pines Resistant and Susceptible to the Mountain Pine Beetlel and Associated Microorganisms2

Physiological Differences Between Lodgepole Pines Resistant and Susceptible to the Mountain Pine Beetlel and Associated Microorganisms2,KENNETH F. RAF

Physiological Differences Between Lodgepole Pines Resistant and Susceptible to the Mountain Pine Beetlel and Associated Microorganisms2   (Citations: 40)
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Environ. Entomol. 11: 486-492 (1982) Lodgepole pines, Pinus contorta Douglas vaL latifolia Engelmann, were assayed for traits as­ sociated with resistance to the mountain pine beetle, Dendroctonusponderosae Hopkins (Co­ leoptera: Scolytidae). There was no relationship between resistance and the daily rate of resin flow, rate of resin crystallization, monoterpene content, monoterpene composition, or current growth rate. The major difference between trees which survived or died during exposure to naturally occurring high beetle -popUlations was the extent of their active response to fungal inva­ sion. Resistant trees responded to artificial inoculation with fungi vectored by D. ponderosae by forming greater quantities of resin than did susceptible trees. This wound response is general in nature, quantitatively variable, metabolically active, rapid, and localized. It appears to form the major line of defense to D. ponderosae and its associated fungi, and to be related to the general vigor of the tree. The wound response was greatest in those trees which had a periodic growth ratio greater than unity.
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    • ...Measuring resin flow 3 days after beetle placement allowed us to capture the tree’s response (if any) to the beetle’s presence, as induced responses appear to predict tree suitability better than constitutive defenses (Raffa and Berryman 1982)...
    • ...Induced defensive responses appear to be more critical than constitutive defenses for tree resistance (Raffa and Berryman 1982, 1987), but we do not know what cues beetles use to predict tree defensive responses to the beetles’ entrance...

    Tanya M. Lattyet al. Who goes first? Condition and danger dependent pioneering in a group-l...

    • ...Many conifers are subject to injury and death due to insect attack and many characteristics of growth (Phipps and Whiton 1988; Leblanc 1990; Ogle et al. 2000; Suarez et al. 2004) and defense (Vite ´ and Wood 1961; Hodges et al. 1979; Raffa and Berryman 1982; Reeve et al. 1995; Strom et al. 2002) have been related to this mortality...

    Jeffrey M. KaneThomaset al. Importance of resin ducts in reducing ponderosa pine mortality from ba...

    • ...lodgepole pine and mountain pine beetle, Reid et al., 1967; Raffa & Berryman, 1982a) and grand fir and fir engraver beetle (Berryman, 1969)...
    • ...In addition, induced resin may deter oviposition, increase brood mortality and inhibit the establishment of blue-stain fungi associated with bark beetles (Reid et al., 1967; Berryman, 1969; Berryman & Ashraf, 1970; Shrimpton, 1973; Raffa & Berryman, 1982a, 1982b; Christiansen, 1985; Horntvedt, 1988)...
    • ...The positive relationship between host vigour and resistance to bark beetle attack has been well established for a number of species (Lorio & Hodges, 1977; Ferrell, 1978; Waring & Pitman, 1980; Raffa & Berryman, 1982a; Hard et al., 1983; Hard, 1985; Mulock & Christiansen, 1986; Shore et al., 1999), including western balsam bark beetle (Bleiker et al., 2003)...

    Katherine P. Bleikeret al. Resistance of fast- and slow-growing subalpine fir to pheromone-induce...

    • ...This form of defense is most commonly associated with conifers (Raffa & Berryman 1982; Schowalter & Filip 1993; Tisdale et al...

    Evan L. Preisseret al. Plant damage from and defenses against ‘cryptic’ herbivory: A guild pe...

    • ...However, most inoculation experiments result in restricted host defensive reactions (Shrimpton 1973; Raffa and Berryman 1982, 1983a,b; Cook and Hain 1986, 1988; Paine and Stephen 1987; Raffa 1991; Lieutier et al. 1993, Raffa and Smalley 1995; Paine et al. 1997)...

    Lori G. Eckhardtet al. Interactions of Hylastes Species (Coleoptera: Scolytidae) with Leptogr...

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