Discrimination among host tree species by the ambrosia beetle<i>Platypus quercivorus</i>

Yamasaki, Michimasa; Futai, Kazuyoshi

doi:10.1007/s10310-011-0280-7

Cited by 10 publications

(10 citation statements)

References 21 publications

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“…Center, Kyoto University (35°01.44′N, 135°47.15′E). The leaves of Q. crispula were used as a source of volatiles for olfactory bioassays as this tree species is a favoured host of P. quercivorus (Yamasaki & Futai, 2012). Different deterioration statuses were simulated by drying leaves for different amounts of time after cutting (cut days).…”

Section: Experimental Station Field Science Education and Researchmentioning

confidence: 99%

Effects of leaf conditions and flight activity on the behaviour of Platypus quercivorus (Murayama) (Coleoptera: Platypodidae)

Pham

Ito²,

Okada

et al. 2019

J Applied Entomology

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The important role of semiochemicals in the interactions between plants and insects has been extensively investigated. The volatiles produced by oak trees are thought to attract the ambrosia beetle Platypus quercivorus (Murayama), which causes wilt disease in Quercus trees, resulting in widespread damage. In the present study, we hypothesized that (a) P. quercivorus is attracted to the leaf volatiles emitted by host trees and (b) the response of P. quercivorus to leaf volatiles is affected by flight. An experiment was performed to survey the preferences of both sexes of P. quercivorus for the leaf volatiles of Quercus crispula Blume at various stages of leaf deterioration, represented by different number of days after cutting. Additionally, the effect of flight on both sexes was evaluated by testing the beetle flight on a flight mill. The results showed that P. quercivorus was attracted to the volatiles emitted from fresh leaves and was not attracted to those emitted from dry leaves. This suggests that leaf volatiles from healthy hosts are primary attractants for P. quercivorus. Further, males exhibited increased olfactory responses to leaf volatiles as their flight duration increased, whereas the opposite pattern was observed in females. These results suggest that the different ecological roles of the sexes contribute to differences in olfactory responses. K E Y W O R D S flight mill, host selection, olfactory response, Quercus crispula, volatile, Y-tube olfactometer

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Section: Experimental Station Field Science Education and Researchmentioning

confidence: 99%

Effects of leaf conditions and flight activity on the behaviour of Platypus quercivorus (Murayama) (Coleoptera: Platypodidae)

Pham

Ito²,

Okada

et al. 2019

J Applied Entomology

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“…Previous studies on trees attacked by P. quercivorus have considered all probable host trees in a certain area as subjects of analysis and have shown the preferences of the beetles during their attack process with regard to species (Yamasaki and Futai 2012), size (Akaishi et al 2006;Yamasaki and Sakimoto 2009), and infection history (Yamasaki and Futai 2008). However, the attack process of the beetles is thought to be divided into two phases: the initial attack and the mass attack (Fig.…”

Section: Resultsmentioning

confidence: 98%

“…Quercus crispula is a more suitable host for P. quercivorus than C. crenata (Tarno et al 2011); therefore, the beetle is more inclined to use Q. crispula as an attack target (Yamasaki and Futai 2012), resulting in a higher probability of death for this species.…”

Section: Discussionmentioning

confidence: 99%

“…It has been suggested that P. quercivorus can discriminate between tree species (Yamasaki and Futai 2012) with different susceptibilities (Kobayashi et al 2004); therefore, a difference in the probability of initiation of a mass attack may be observed among tree species. The preference of P. quercivorus for targeting trees with wider trunks (Akaishi et al 2006;Yamasaki and Sakimoto 2009) may be explained by the requirement of the species for large volumes of sapwood to construct galleries (Hijii et al 1991).…”

Section: Introductionmentioning

confidence: 98%

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Mass attack by the ambrosia beetlePlatypus quercivorusoccurs in single trees and in groups of trees

2014

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Bark and ambrosia beetles sometimes kill trees by attacking them en masse; however, their attack is not necessarily successful. Less than half of the fagaceous trees attacked by the ambrosia beetle Platypus quercivorus (Murayama) die, and the factors affecting this mortality are still unknown. To examine this issue, the survival of all stems of fagaceous trees attacked by the ambrosia beetle was investigated in a secondary forest from 2008 to 2010. In an area of 93 ha, 2130 stems (1278 genets) of fagaceous trees were attacked by P. quercivorus during the study period, and 813 of these stems died. A generalized additive mixed model was constructed to predict the probability of mortality of the attacked stems. A best-fit model showed that the probability of mortality was higher in Quercus crispula Blume than in Castanea crenata Sieb. & Zucc. A positive correlation was determined between the density of the attacked trees and the probability of mortality, suggesting that mass attack of P. quercivorus occurs not only on individual trees, but also on groups of trees. Assuming that trees attacked earlier in the season have a higher probability of mortality, the observed negative effects of altitude suggest that P. quercivorus initially seeks hosts at lower elevations. Résumé :Les scolytes tuent parfois des arbres avec des attaques en masse mais cela ne réussit pas à tout coup. Moins de la moitié des arbres appartenant à la famille des fagacées qui sont attaqués par le scolyte Platypus quercivorus (Murayama) meurent et les facteurs associés à la mortalité sont à ce jour inconnus. Pour étudier cette question, la survie de tous les arbres de la famille des fagacées attaqués par ce scolyte a été étudiée dans une forêt de seconde venue de 2008 à 2010. Dans une zone de 93 ha, 2130 tiges (1278 génotypes) de la famille des fagacées ont été attaquées par P. quercivorus durant la période d'étude et 813 de ces tiges sont mortes. Un modèle mixte additif généralisé a été élaboré pour prédire la probabilité qu'un arbre attaqué meure. Le meilleur modèle a montré que la probabilité qu'un arbre meure était plus élevée pour Quercus crispula Blume que pour Castanea crenata Sieb. & Zucc. Une corrélation positive a été trouvée entre la densité des arbres attaqués et la probabilité qu'un arbre meure, indiquant que les attaques en masse de P. quercivorus surviennent non seulement sur des individus mais aussi sur des groupes d'arbres. En assumant que les arbres attaqués plus tôt durant la saison ont une plus forte probabilité de mourir, les effets négatifs de l'altitude que nous avons observés indiquent que P. quercivorus cherche d'abord des hôtes à plus basse altitude. [Traduit par la Rédaction] Mots-clés : Castanea crenata, densité des arbres attaqués, dépérissement du chêne japonais, probabilité de mortalité, Quercus crispula.

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“…This is surprising, because several studies have emphasized that the sizes of individual trees are positively related to the intensity of P. quercivorus attack Akaishi et al, 2006;Yamasaki and Futai, 2012), and thus to mortality (Nishigaki et al, 1998;Yamasaki and Sakimoto, 2009). This discrepancy might be due to the fact that those previous studies were conducted in a small number of plots over a relatively small geographic range, whereas our study was surveyed a relatively large number of plots spread over a large geographic range.…”

Section: Stand-level Factors Affecting Tree Mortalitymentioning

confidence: 88%

Relative importance of multiple scale factors to oak tree mortality due to Japanese oak wilt disease

Oguro

Imahiro

Saito

et al. 2015

Forest Ecology and Management

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Discrimination among host tree species by the ambrosia beetlePlatypus quercivorus

Cited by 10 publications

References 21 publications

Effects of leaf conditions and flight activity on the behaviour of Platypus quercivorus (Murayama) (Coleoptera: Platypodidae)

Effects of leaf conditions and flight activity on the behaviour of Platypus quercivorus (Murayama) (Coleoptera: Platypodidae)

Mass attack by the ambrosia beetlePlatypus quercivorusoccurs in single trees and in groups of trees

Relative importance of multiple scale factors to oak tree mortality due to Japanese oak wilt disease

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