scholarly journals Spatial distribution of a flying ambrosia beetle Platypus quercivorus (Coleoptera: Platypodidae) at the stand level

2004 ◽  
Vol 39 (4) ◽  
pp. 583-589 ◽  
Author(s):  
Yutaka Igeta ◽  
Kojiro Esaki ◽  
Kenryu Kato ◽  
Naoto Kamata
Keyword(s):  
Spatial Distribution ◽  
Ambrosia Beetle ◽  
Platypus Quercivorus

Potential impact of global warming on deciduous oak dieback caused by ambrosia fungus Raffaelea sp. carried by ambrosia beetle Platypus quercivorus (Coleoptera: Platypodidae) in Japan

2002 ◽  
Vol 92 (2) ◽  
pp. 119-126 ◽  
Author(s):  
N. Kamata ◽  
K. Esaki ◽  
K. Kato ◽  
Y. Igeta ◽  
K. Wada
Keyword(s):  
Global Warming ◽  
Reproductive Success ◽  
Evolutionary Process ◽  
Ambrosia Beetle ◽  
Quercus Crispula ◽  
Platypus Quercivorus ◽  
Stable Relationship ◽  
Future Global Warming ◽  
Potential Impact ◽  
Associated Species

AbstractDeciduous oak dieback in Japan has been known since the 1930s, but in the last ten years epidemics have intensified and spread to the island’s western coastal areas. The symbiotic ambrosia fungus Raffaelea sp. is the causal agent of oak dieback, and is vectored by Platypus quercivorus (Murayama). This is the first example of an ambrosia beetle fungus that kills vigorous trees. Mortality of Quercus crispula was approximately 40% but much lower for associated species of Fagaceae, even though each species had a similar number of beetle attacks. It is likely that other oaks resistant to the fungus evolved under a stable relationship between the tree, fungus and beetle during a long evolutionary process. Quercus crispula was probably not part of this coevolution. This hypothesis was supported by the fact that P. quercivorus showed the least preference for Q. crispulayet exhibited highest reproductive success in this species. Therefore, P. quercivorus could spread more rapidly in stands with a high composition of Q. crispula. The present oak dieback epidemic in Japan probably resulted from the warmer climate that occurred from the late 1980s which made possible the fateful encounter of P. quercivorus with Q. cripsula by allowing the beetle to extend its distribution to more northerly latitudes and higher altitudes. Future global warming will possibly accelerate the overlapping of the distributions of P. quercivorus and Q. crispula with the result that oak dieback in Q. crispula will become more prevalent in Japan.

scholarly journals A New Cytosporone Derivative from the Endophytic Fungus Cytospora sp

2014 ◽  
Vol 9 (7) ◽  
pp. 1934578X1400900 ◽  
Author(s):  
Tomoya Takano ◽  
Takuya Koseki ◽  
Hiromasa Koyama ◽  
Yoshihito Shiono
Keyword(s):  
Antimicrobial Activity ◽  
Endophytic Fungus ◽  
2D Nmr ◽  
Ambrosia Beetle ◽  
Oak Wilt ◽  
Tree Disease ◽  
Platypus Quercivorus ◽  
Mass Spectral ◽  
Screening Study ◽  
Raffaelea Quercivora

Japanese oak wilt (JOW) is a tree disease caused by the fungus Raffaelea quercivora, which is vectored by the ambrosia beetle, Platypus quercivorus. In a screening study of the inhibitory active compounds from fungi, a new cytosporone analogue, compound 1, was isolated from the endophytic fungus Cytospora sp. TT-10 isolated from Japanese oak, together with the known compounds, integracin A (2), cytosporones N (3) and A (4). Their structures were determined by extensive 1D– and 2D–NMR spectroscopic and mass spectral analyses. Compound 1 was identified as 4,5-dihydroxy-3-heptylphthalide and named cytosporone E. Compounds 2 and 3 showed antimicrobial activity against Raffaelea quercivora.

scholarly journals Seasonal Emergence and Flight Behavior of the Oak Ambrosia Beetle Platypus quercivorus along an Altitudinal Gradient in the High Elevation Areas

2019 ◽  
Vol 101 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Tomoko Fukuzawa ◽  
Ryosuke Arai ◽  
Hiroshi Kitajima ◽  
Masahiko Tokoro ◽  
Mineaki Aizawa ◽  
...  
Keyword(s):  
Altitudinal Gradient ◽  
High Elevation ◽  
Ambrosia Beetle ◽  
Flight Behavior ◽  
Platypus Quercivorus

Analysis of Oak Tree Mortality to Predict Ambrosia Beetle Platypus quercivorus Movement

2016 ◽  
Vol 62 (4) ◽  
pp. 377-384 ◽  
Author(s):  
Michimasa Yamasaki ◽  
Takayuki Kaneko ◽  
Atsushi Takayanagi ◽  
Makoto Ando
Keyword(s):  
Tree Mortality ◽  
Ambrosia Beetle ◽  
Platypus Quercivorus ◽  
Oak Tree

scholarly journals Draft Genome Sequence of Raffaelea quercivora JCM 11526, a Japanese Oak Wilt Pathogen Associated with the Platypodid Beetle, Platypus quercivorus

2016 ◽  
Vol 4 (4) ◽  
Author(s):  
Hayato Masuya ◽  
Ri-ichiroh Manabe ◽  
Moriya Ohkuma ◽  
Rikiya Endoh
Keyword(s):  
Genome Sequence ◽  
Draft Genome ◽  
Mass Mortality ◽  
Ambrosia Beetle ◽  
Draft Genome Sequence ◽  
Oak Wilt ◽  
Platypus Quercivorus ◽  
Japanese Oak Wilt ◽  
Raffaelea Quercivora

The Japanese oak wilt pathogen Raffaelea quercivora and the platypodid beetle, Platypus quercivorus , cause serious mass mortality of Quercus spp. in Japan. Here, we present the first draft genome sequence of R. quercivora JCM 11526 to increase our understanding of the mechanism of pathogenicity and symbiosis with the ambrosia beetle.

scholarly journals Mass attack by the ambrosia beetle Platypus quercivorus occurs in single trees and in groups of trees

2014 ◽  
Vol 44 (3) ◽  
pp. 243-249 ◽  
Author(s):  
Michimasa Yamasaki ◽  
Yasuto Ito ◽  
Makoto Ando
Keyword(s):  
Mixed Model ◽  
Secondary Forest ◽  
Ambrosia Beetle ◽  
Negative Effects ◽  
Quercus Crispula ◽  
Factors Affecting ◽  
Platypus Quercivorus ◽  
Bark And Ambrosia Beetles ◽  
Mass Attack ◽  
Individual Trees

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.

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