Electroantennographic Responses of Cerambyx welensii Küster to Host-Related Volatiles

Wood-boring insects, such as Cerambyx welensii Küster, are involved in oak decline in Mediterranean areas. To advance our understanding of the olfactory perception of C. welensii, we recorded electroantennographic (EAG) responses from male and female antennae to 32 tree volatile organic compounds typical of emissions from its main Quercus L. hosts, and also analysed the dose-dependent response. Cerambyx welensii antennae responded to 24 chemicals. Eight odorants elicited the highest EAG responses (normalized values of over 98%): 1,8-cineole, limonene-type blend, β-pinene, pinene-type blend, sabinene, α-pinene, turpentine and (E)-2-hexenal. Cerambyx welensii exhibits a broad sensitivity to common tree volatiles. The high EAG responses to both limonene- and pinene-type blends suggest the detection of specific blends of the main foliar monoterpenes emitted by Q. suber L. and Q. ilex L. (limonene, α- and β-pinene, sabinene and myrcene), which could influence the intraspecific host choice by C. welensii, and in particular, females may be able to detect oak trees with a limonene-type chemotype. In addition, C. welensii showed high antennal activity to some odorants that characterize emissions from non-host tree species (1,8-cineole, β-pinene, α-pinene, turpentine, δ3-carene and camphene). The results obtained may be applicable to optimize monitoring and mass-trapping programmes in an integrated pest management context.

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OH reactivity and concentrations of Biogenic Volatile Organic Compounds in a Mediterranean forest of downy oak trees

Atmospheric Chemistry and Physics Discussions ◽

10.5194/acpd-15-22047-2015 ◽

2015 ◽

Vol 15 (16) ◽

pp. 22047-22095 ◽

Cited By ~ 1

Author(s):

N. Zannoni ◽

V. Gros ◽

M. Lanza ◽

R. Sarda ◽

B. Bonsang ◽

...

Keyword(s):

Volatile Organic Compounds ◽

Organic Compounds ◽

Degradation Products ◽

Ambient Air ◽

Oxidation Products ◽

Deciduous Tree ◽

Forest Site ◽

Mediterranean Forests ◽

Oak Trees ◽

Volatile Organic

Abstract. Understanding the processes between the biosphere and the atmosphere is challenged by the difficulty to determine with enough accuracy the composition of the atmosphere. Total OH reactivity, which is defined as the total loss of the hydroxyl radical in the atmosphere, has proved to be an excellent tool to identify indirectly the important reactive species in ambient air. High levels of unknown reactivity were found in several forests worldwide and were often higher than at urban sites. Such results demonstrated the importance of OH reactivity for characterizing two of the major unknowns currently present associated to forests: the set of primary emissions from the canopy to the atmosphere and biogenic compounds oxidation pathways. Previous studies also highlighted the need to quantify OH reactivity and missing OH reactivity at more forested sites. Our study presents results of a field experiment conducted during late spring 2014 at the forest site at the Observatoire de Haute Provence, OHP, France. The forest is mainly composed of downy oak trees, a deciduous tree species characteristic of the Mediterranean region. We deployed the Comparative Reactivity Method and a set of state-of-the-art techniques such as Proton Transfer Reaction-Mass Spectrometry and Gas Chromatography to measure the total OH reactivity, the concentration of volatile organic compounds and main atmospheric constituents at the site. We sampled the air masses at two heights: 2 m, i.e. inside the canopy, and 10 m, i.e. above the canopy, where the mean canopy height is 5 m. We found that the OH reactivity at the site mainly depended on the main primary biogenic species emitted by the forest, which was isoprene and to a lesser extent by its degradation products and long lived atmospheric compounds (up to 26 % during daytime). We determined that the daytime total measured reactivity equaled the calculated reactivity obtained from the concentrations of the compounds measured at the site. Hence, no significant missing reactivity is reported in this specific site, neither inside, nor above the canopy. However, during two nights we reported a missing fraction of OH reactivity up to 50 %, possibly due to unmeasured oxidation products. Our results confirm the weak intra canopy oxidation, already suggested in a previous study focused on isoprene fluxes. They also demonstrate how helpful can be the OH reactivity as a tool to clearly characterize the suite of species present in the atmosphere. We show that our result of reactivity is among the highest reported in forests worldwide and stress the importance to quantify OH reactivity at more and diverse Mediterranean forests.

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Assessing mass trapping efficiency and population density of Cerambyx welensii Küster by mark-recapture in dehesa open woodlands

European Journal of Forest Research ◽

10.1007/s10342-011-0579-0 ◽

2011 ◽

Vol 131 (4) ◽

pp. 1103-1116 ◽

Cited By ~ 27

Author(s):

Luis M. Torres-Vila ◽

Álvaro Sanchez-González ◽

Francisco Ponce-Escudero ◽

Daniel Martín-Vertedor ◽

Juan J. Ferrero-García

Keyword(s):

Population Density ◽

Trapping Efficiency ◽

Mass Trapping ◽

Mark Recapture ◽

Cerambyx Welensii

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Diurnal and seasonal emissions of volatile organic compounds from cork oak () trees

Atmospheric Environment ◽

10.1016/j.atmosenv.2004.11.018 ◽

2005 ◽

Vol 39 (10) ◽

pp. 1817-1827 ◽

Cited By ~ 47

Author(s):

C PIO ◽

P SILVA ◽

M CERQUEIRA ◽

T NUNES

Keyword(s):

Volatile Organic Compounds ◽

Organic Compounds ◽

Cork Oak ◽

Oak Trees ◽

Volatile Organic

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Complete development of Anoplophora glabripennis (Coleoptera: Cerambycidae) in northern red oak trees

The Canadian Entomologist ◽

10.4039/n04-083 ◽

2005 ◽

Vol 137 (3) ◽

pp. 376-379 ◽

Cited By ~ 9

Author(s):

W.D. Morewood ◽

K. Hoover ◽

P.R. Neiner ◽

J.C. Sellmer

Keyword(s):

The United States ◽

Solid Wood ◽

Deciduous Trees ◽

Anoplophora Glabripennis ◽

Northern Red Oak ◽

Inspection Agency ◽

Oak Trees ◽

Canadian Food Inspection Agency ◽

Hardwood Tree ◽

Wood Boring

The invasive wood-boring beetle Anoplophora glabripennis (Motschulsky) (Coleoptera: Cerambycidae) poses a serious threat to deciduous trees in North America and Europe, where it has been introduced in solid wood packing material from China (Haack et al. 1997; Krehan 2003). This beetle attacks and ultimately kills a wide variety of hardwood tree species (Nowak et al. 2001; Lingafelter and Hoebeke 2002); it has infested urban shade trees in Canada (Canadian Food Inspection Agency 2004), the United States (Haack 2003), and Austria (Tomiczek 2003) and has damaged poplar (Populus L.; Salicaceae) plantations in its native China (Luo et al. 2003).

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Allicin, the Odor of Freshly Crushed Garlic: A Review of Recent Progress in Understanding Allicin’s Effects on Cells

Molecules ◽

10.3390/molecules26061505 ◽

2021 ◽

Vol 26 (6) ◽

pp. 1505

Author(s):

Jan Borlinghaus ◽

Jana Foerster (née Reiter) ◽

Ulrike Kappler ◽

Haike Antelmann ◽

Ulrike Noll ◽

...

Keyword(s):

Sulfur Compound ◽

Current Knowledge ◽

Organic Sulfur Compound ◽

Gram Negative Bacteria ◽

Cellular Redox ◽

Defense Substance ◽

Volatile Organic ◽

Dose Dependent ◽

Higher Doses ◽

Redox Buffer

The volatile organic sulfur compound allicin (diallyl thiosulfinate) is produced as a defense substance when garlic (Allium sativum) tissues are damaged, for example by the activities of pathogens or pests. Allicin gives crushed garlic its characteristic odor, is membrane permeable and readily taken up by exposed cells. It is a reactive thiol-trapping sulfur compound that S-thioallylates accessible cysteine residues in proteins and low molecular weight thiols including the cellular redox buffer glutathione (GSH) in eukaryotes and Gram-negative bacteria, as well as bacillithiol (BSH) in Gram-positive firmicutes. Allicin shows dose-dependent antimicrobial activity. At higher doses in eukaryotes allicin can induce apoptosis or necrosis, whereas lower, biocompatible amounts can modulate the activity of redox-sensitive proteins and affect cellular signaling. This review summarizes our current knowledge of how bacterial and eukaryotic cells are specifically affected by, and respond to, allicin.

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Development of Semiochemical Attractants for Monitoring and Controlling Chlorophorus caragana

Zeitschrift für Naturforschung C ◽

10.1515/znc-2013-5-611 ◽

2013 ◽

Vol 68 (5-6) ◽

pp. 243-252

Author(s):

Shixiang Zong ◽

Xinhai Liu ◽

Chuanjian Cao ◽

Youqing Luo

Keyword(s):

Volatile Compounds ◽

Dibutyl Phthalate ◽

Caragana Korshinskii ◽

Effi Ciency ◽

Electrophysiological Responses ◽

And Control ◽

Wood Boring ◽

Dose Dependent ◽

Whole Tree ◽

Monitor And Control

Chlorophorus caragana is an important wood-boring pest that infests Caragana korshinskii. The larvae bore into the stems to the point of hollowing them out, causing the whole tree to wither and even die. To control these infestations, volatile compounds were collected from C. korshinskii and used in electroantennography to ascertain which plant semiochemicals could be used to trap adult C. caragana in the fi eld. Isophorone, cis-3-hexen-1-ol, 3-pentanone, dibutyl phthalate, and diisobutyl phthalate were the main volatile compounds produced by C. korshinskii. These compounds induced dose-dependent electrophysiological responses in the antennae of adult C. caragana to some degree. Accordingly, 58 different compound mixtures were tested in fi eld trapping experiments over two consecutive years. Isophorone was most attractive to adult insects. In the fi eld, the best traps were funnelshaped ones hanging at a height of 1 m. The trapping effi ciency was 63.8%. Adult beetles appear between mid June and late August, with an eclosion peak in mid July. The prototype trapping system developed could be used as a tool to monitor and control C. caragana adults.

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