Host tree resistance against the polyphagous wood‐boring beetle Anoplophora glabripennis

Abstract

Anoplophora glabripennis (Motschulsky) (Coleoptera: Cerambycidae: Lamiini) is an invasive woodboring beetle with an unusually broad host range and a proven ability to increase its host range as it colonizes new areas and encounters new tree species. The beetle is native to eastern Asia and has become an invasive pest in North America and Europe, stimulating interest in delineating host and non-host tree species more clearly. When offered a choice among four species of living trees in a greenhouse, adult A. glabripennis fed more on golden-rain tree ( Koelreuteria paniculata Laxmann) and river birch ( Betula nigra L.) than on London planetree ( Platanus × acerifolia (Aiton) Willdenow) or callery pear ( Pyrus calleryana Decaisne). Oviposition rate was highest in golden-rain tree, but larval mortality was also high and larval growth was slowest in this tree species. Oviposition rate was lowest in callery pear, and larvae failed to survive in this tree species, whether they eclosed from eggs laid in the trees or were manually inserted into the trees. Adult beetles feeding on callery pear had a reduced longevity and females feeding only on callery pear failed to develop any eggs. The resistance of golden-rain tree against the larvae appears to operate primarily through the physical mechanism of abundant sap flow. The resistance of callery pear against both larvae and adults appears to operate through the chemical composition of the tree, which may include compounds that are toxic or which otherwise interfere with normal growth and development of the beetle. Unlike river birch or London planetree, both golden-rain tree and callery pear are present in the native range of A. glabripennis and may therefore have developed resistance to the beetle by virtue of exposure to attack during their evolutionary history.

A low Platypus quercivorus hole density does not necessarily indicate a small flying population

“…Several tree characteristics are thought to affect the PBM of P. quercivorus, including sapwood hardness (Green et al 2004) and resistant response (Morewood et al 2004). Future research should clarify differences in these characteristics among tree species in relation to their susceptibility to P. quercivorus.…”

Inter- and Intra-Specific Variation in Stem Phloem Phenolics of Paper Birch (Betula papyrifera) and European White Birch (Betula pendula)

“…Proposed physical mechanisms of resistance include high rates of sap flow (Morewood et al, 2004) and specialized water-containing vesicles (Hanks et al, 1991(Hanks et al, , 1999, which can inhibit larval establishment. Additionally, induction of wound periderms (callus tissues) in response to larval feeding is hypothesized to function defensively by encapsulating larvae (Anderson, 1944;Dunn et al, 1990;Fierke and Stephen, 2008).…”

“…Additionally, induction of wound periderms (callus tissues) in response to larval feeding is hypothesized to function defensively by encapsulating larvae (Anderson, 1944;Dunn et al, 1990;Fierke and Stephen, 2008). Putative chemical mechanisms of resistance include constitutive and induced secondary metabolites present in bark and phloem tissues (Morewood et al, 2004). For example, differences in phenolic profiles in stem phloem tissues of resistant and susceptible ash species were implicated as resistance mechanisms to emerald ash borer (Eyles et al, 2007).…”

Selectivity mechanism of Anoplophora glabripennis on four different species of maples

“…and Acer negundo L.. It was reported that 18 genera were damaged by Anoplophora glabripennis and great economic loses had been made (Keena, 2002;Smith and Bancroft, 2002;Morewood et al, 2004). The volatiles emitted from the host plant play an important role for insects in finding their targets.…”