Evaluations of Insecticides and Fungicides for Reducing Attack Rates of a new invasive ambrosia beetle (Euwallacea Sp., Coleoptera: Curculionidae: Scolytinae) in Infested Landscape Trees in California

2017 ◽  
Vol 110 (4) ◽  
pp. 1611-1618 ◽  
Author(s):  
Michele Eatough Jones ◽  
John Kabashima ◽  
Akif Eskalen ◽  
Monica Dimson ◽  
Joey S. Mayorquin ◽  
...  
Keyword(s):  
Ambrosia Beetle ◽  
Landscape Trees

The Ambrosia Beetle Sueus niisimai (Scolytinae: Hyorrhynchini) is Associated with the Canker Disease Fungus Diatrypella japonica (Xylariales)

Plant Disease ◽  
2020 ◽  
Vol 104 (12) ◽  
pp. 3143-3150
Author(s):  
You Li ◽  
James Skelton ◽  
Sawyer Adams ◽  
Yukako Hattori ◽  
Matthew E. Smith ◽  
...  
Keyword(s):  
Tree Mortality ◽  
Phylogenetic Analyses ◽  
Geographical Area ◽  
Ambrosia Beetle ◽  
Damage Potential ◽  
Disease Symptoms ◽  
Canker Disease ◽  
Invasion Potential ◽  
Landscape Trees ◽  
Quercus Shumardii

Ambrosia beetles in the subtribe Hyorrhynchini are one example of an entire ambrosia beetle lineage whose fungi have never been studied. Here, we identify one dominant fungus associated with a widespread Asian hyorrhynchine beetle Sueus niisimai. This fungus was consistently isolated from beetle galleries from multiple collections. Phylogenetic analyses of combined ITS rDNA and β-tubulin sequences identified the primary fungal symbiont as Diatrypella japonica Higuchi, Nikaido & Hattori (Diatrypaceae, Xylariales, Sordariomycetes), which was recently described as a pathogen of sycamore (Platanus spp.) in Japan. To assess the invasion potential of this beetle-fungus interaction into the U.S., we have investigated the pathogenicity of two D. japonica strains on four species of healthy landscape trees native to the southeastern United States. Only Shumard oak (Quercus shumardii) responded with lesions significantly greater than the control inoculations, but there was no observable dieback or tree mortality. Although disease symptoms were not as prominent as in previous studies of the same fungus in Japan, routine reisolation from the inoculation point suggests that this species is capable of colonizing healthy sapwood of several tree species. Our study shows that the geographical area of its distribution is broader in Asia and potentially includes many hosts of its polyphagous vector. We conclude that the Sueus-Diatrypella symbiosis has high invasion potential but low damage potential, at least on young trees during the growing season.

LINEATIN ENANTIOMER PREFERENCE, FLIGHT PERIODS, AND EFFECT OF PHEROMONE CONCENTRATION AND TRAP LENGTH ON THREE SYMPATRIC SPECIES OF TRYPODENDRON (COLEOPTERA: SCOLYTIDAE)

2000 ◽  
Vol 132 (6) ◽  
pp. 877-887 ◽  
Author(s):  
B.S. Lindgren ◽  
S.E.R. Hoover ◽  
A.M. MacIsaac ◽  
C.I. Keeling ◽  
K.N. Slessor
Keyword(s):  
Sex Ratio ◽  
Reproductive Isolation ◽  
Release Rate ◽  
Sympatric Species ◽  
Ambrosia Beetle ◽  
Flight Period ◽  
Trypodendron Lineatum ◽  
Temporal Separation ◽  
Baited Traps ◽  
Pheromone Concentration

AbstractThe effects of lineatin enantiomer ratios, lineatin release rate, and trap length on catches and the flight periods of three sympatric species of Trypodendron Stephens were investigated in field bioassays using multiple-funnel traps. The ambrosia beetle, Trypodendron betulae Swaine, was caught in similar numbers in baited traps and blank control traps, showing that this species does not respond to lineatin. Our results confirmed that Trypodendron lineatum (Olivier) is attracted only to (+)-lineatin. Trypodendron rufitarsus (Kirby) and Trypodendron retusum (LeConte) were shown to utilize lineatin and like T. lineatum were caught only when (+)-lineatin was present. These results indicate that lineatin does not govern reproductive isolation among these three species. There was no effect by (+)-lineatin release rate within the range tested. The flight of T. rufitarsus commenced earlier and ceased before the peak of the T. lineatum flight, suggesting that temporal separation may be an important component of reproductive isolation between these two species. The flight period of T. retusum was similar to that of T. lineatum. Host odours may aid in reproductive isolation of these two species. Enantiomer blend did not significantly affect sex ratio in any species; however, sex ratio differed among species, indicating that different species responded differently to the traps or that natural sex ratios differ. Catches of T. rufitarsus and T. retusum increased with trap length when pheromone release per trap was held constant and when release was held constant relative to trap length. Trap length and release rate did not affect sex ratio.

In-vitro evaluation of copper nanoparticles as a potential control agent against the fungal symbionts of the invasive ambrosia beetle Euwallacea fornicatus

2021 ◽  
Vol 143 ◽  
pp. 105564
Author(s):  
Luisa F. Cruz ◽  
Juan C. Cruz ◽  
Daniel Carrillo ◽  
Arturo I. Mtz-Enriquez ◽  
Araceli Lamelas ◽  
...  
Keyword(s):  
Copper Nanoparticles ◽  
Control Agent ◽  
Ambrosia Beetle ◽  
In Vitro Evaluation ◽  
Potential Control

Response of desert-adapted landscape trees to deficit irrigation

2016 ◽  
pp. 193-200
Author(s):  
U.K. Schuch ◽  
T.R. Mahato ◽  
J. Subramani ◽  
E.C. Martin
Keyword(s):  
Deficit Irrigation ◽  
Landscape Trees
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