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Fredrik Schlyte - One of the best experts on this subject based on the ideXlab platform.

  • Non-Host Volatile Blend Optimization for Forest Protection against the European Spruce Bark Beetle, Ips typographus
    2016
    Co-Authors: Rikard C. Unelius, Christia Schiebe, Marti N. Andersson¤b, Fredrik Schlyte
    Abstract:

    Conifer feeding bark beetles (Coleoptera, Curculionidae, Scolytinae) pose a serious economic threat to forest production. Volatiles released by non-host angiosperm plants (so called non-host volatiles, NHV) have been shown to reduce the risk of attack by many bark beetle species, including the European spruce bark beetle, Ips typographus. However, the most active blend for I. typographus, containing three green leaf volatiles (GLVs) in addition to the key compounds trans-conophthorin (tC) and Verbenone, has been considered too expensive for use in large-scale management. To lower the cost and improve the applicability of NHV, we aim to simplify the blend without compromising its anti-attractant potency. Since the key compound tC is expensive in pure form, we also tested a crude version: technical grade trans-conophthorin (T-tC). In another attempt to find a more cost effective substitute for tC, we evaluated a more readily synthesized analog: dehydro-conophthorin (DHC). Our results showed that 1-hexanol alone could replace the three-component GLV blend containing 1-hexanol, (3Z)-hexen-1-ol, and (2E)-hexen-1-ol. Furthermore, the release rate of tC could be reduced from 5 mg/day to 0.5 mg/day in a blend with 1-hexanol and (–)-Verbenone without compromising the anti-attractant activity. We further show that T-tC was comparable with tC, whereas DHC was a less effective anti-attractant. DHC also elicited weaker physiological responses in the tC-responding olfactory receptor neuron class, providing a likely mechanistic explanation for its weaker anti-attractive effect. Our results suggest a blend consisting of (–)-Verbenone, 1-hexanol and technical trans

  • Test of dehydro-conophthorin, Trial 3.
    2014
    Co-Authors: Rikard C. Unelius, Christia Schiebe, Jö Ohma, Marti N. Andersso, Fredrik Schlyte
    Abstract:

    Results from field trapping test in Parismåla, May 2008. Bars show mean relative catch per replicate ±1 standard error based on n = 15 replicates. Numbers below stimuli acronyms are release rates (mg/day). Acronyms: Ph = pheromone (IT Ecolure Tubus, Fytofarm, Slovakia); Vn = (–)-Verbenone; C6 = 1-hexanol; tC = trans-conophthorin; DHC = dehydro-conophthorin. Bars with same letters are not significantly different (ANOVA on arcsin√(relative catch) followed by Tukey’s HSD multiple range post-hoc test, p

  • Comparison of trap catch reduction by trans-conophthorin versus technical grade trans-conophthorin, Trial 2.
    2014
    Co-Authors: Rikard C. Unelius, Christia Schiebe, Jö Ohma, Marti N. Andersso, Fredrik Schlyte
    Abstract:

    Results from field trapping test in Germundslycke, May – June 2007. Bars show mean relative catch per replicate ±1 standard error based on n = 81 (n = 80 for Vn; n = 79 for C6 at 60 mg/day) replicates. Numbers below stimuli acronyms are release rates (mg/day; Table 1). Acronyms: Ph = pheromone (commercial lure from Chemtica); Vn = (–)-Verbenone; C6 = 1-hexanol; tC = trans-conophthorin; T-tC = technical grade trans-conophthorin. Bars with same letters are not significantly different (ANOVA on arcsin√(relative catch) followed by Dunnet’s T3, p

  • Reducing the release of trans-conophthorin and comparing a GLV-blend with 1-hexanol alone, Trial 1.
    2014
    Co-Authors: Rikard C. Unelius, Christia Schiebe, Jö Ohma, Marti N. Andersso, Fredrik Schlyte
    Abstract:

    Results from field experiment in Asa, South Sweden, May − June 2006. Bars show mean relative catch per replicate ±1 standard error based on n = 21 replicates (trap rotations). Numbers below stimuli acronyms are release rates (mg/day; Table 1). Acronyms: Ph (+) = Ips typographus pheromone blend (ca 57 mg/day); Vn = (–)-Verbenone; GLV = (3Z)-hexen-1-ol, (2E)-hexen-1-ol, 1-hexanol (6 mg/day for a 1∶1∶1 mixture), C6 = 1-hexanol; tC = trans-conophthorin. Bars with same letters are not significantly different (ANOVA on arcsin√(relative catch), followed by Dunnet’s T3 multiple range post-hoc test, p

  • GC-EAD responses of predator antennae to synthetic kairomone blends reveal strong activity of C8 alcohols.
    2013
    Co-Authors: Qing-he Zhang, Fredrik Schlyte
    Abstract:

    Both blends contain conifer tree volatiles (α-pinene and Δ3-carene), general bark beetle pheromone components (trans-verbenol and Verbenone) and some volatiles from trees not exploited by the prey of the clerids (NHV for the prey) from angiosperm bark (C8-alcohols and trans-conophthorin). For each compound, ca. 100 ng was injected. Thus after splitting (1∶1), ca. 50 ng of each compound passed over each Thanasimus formicarius antennal preparation. Vertical dashed lines connect peaks from flame ionization detection (FID) with repeatable peaks from electrographic antennal detection (EAD). A) The base blend plus 2-methyl-3-buten-2-ol and cis-verbenol, main components of the Ips typographus pheromone; B) The base blend plus the GLV (1-hexanol, (Z)-3-hexen-1-ol, and (E)-2-hexen-1-ol), which are active in behavioral inhibition of the prey, I. typographus.

Rikard C. Unelius - One of the best experts on this subject based on the ideXlab platform.

  • Non-Host Volatile Blend Optimization for Forest Protection against the European Spruce Bark Beetle, Ips typographus
    2016
    Co-Authors: Rikard C. Unelius, Christia Schiebe, Marti N. Andersson¤b, Fredrik Schlyte
    Abstract:

    Conifer feeding bark beetles (Coleoptera, Curculionidae, Scolytinae) pose a serious economic threat to forest production. Volatiles released by non-host angiosperm plants (so called non-host volatiles, NHV) have been shown to reduce the risk of attack by many bark beetle species, including the European spruce bark beetle, Ips typographus. However, the most active blend for I. typographus, containing three green leaf volatiles (GLVs) in addition to the key compounds trans-conophthorin (tC) and Verbenone, has been considered too expensive for use in large-scale management. To lower the cost and improve the applicability of NHV, we aim to simplify the blend without compromising its anti-attractant potency. Since the key compound tC is expensive in pure form, we also tested a crude version: technical grade trans-conophthorin (T-tC). In another attempt to find a more cost effective substitute for tC, we evaluated a more readily synthesized analog: dehydro-conophthorin (DHC). Our results showed that 1-hexanol alone could replace the three-component GLV blend containing 1-hexanol, (3Z)-hexen-1-ol, and (2E)-hexen-1-ol. Furthermore, the release rate of tC could be reduced from 5 mg/day to 0.5 mg/day in a blend with 1-hexanol and (–)-Verbenone without compromising the anti-attractant activity. We further show that T-tC was comparable with tC, whereas DHC was a less effective anti-attractant. DHC also elicited weaker physiological responses in the tC-responding olfactory receptor neuron class, providing a likely mechanistic explanation for its weaker anti-attractive effect. Our results suggest a blend consisting of (–)-Verbenone, 1-hexanol and technical trans

  • Test of dehydro-conophthorin, Trial 3.
    2014
    Co-Authors: Rikard C. Unelius, Christia Schiebe, Jö Ohma, Marti N. Andersso, Fredrik Schlyte
    Abstract:

    Results from field trapping test in Parismåla, May 2008. Bars show mean relative catch per replicate ±1 standard error based on n = 15 replicates. Numbers below stimuli acronyms are release rates (mg/day). Acronyms: Ph = pheromone (IT Ecolure Tubus, Fytofarm, Slovakia); Vn = (–)-Verbenone; C6 = 1-hexanol; tC = trans-conophthorin; DHC = dehydro-conophthorin. Bars with same letters are not significantly different (ANOVA on arcsin√(relative catch) followed by Tukey’s HSD multiple range post-hoc test, p

  • Comparison of trap catch reduction by trans-conophthorin versus technical grade trans-conophthorin, Trial 2.
    2014
    Co-Authors: Rikard C. Unelius, Christia Schiebe, Jö Ohma, Marti N. Andersso, Fredrik Schlyte
    Abstract:

    Results from field trapping test in Germundslycke, May – June 2007. Bars show mean relative catch per replicate ±1 standard error based on n = 81 (n = 80 for Vn; n = 79 for C6 at 60 mg/day) replicates. Numbers below stimuli acronyms are release rates (mg/day; Table 1). Acronyms: Ph = pheromone (commercial lure from Chemtica); Vn = (–)-Verbenone; C6 = 1-hexanol; tC = trans-conophthorin; T-tC = technical grade trans-conophthorin. Bars with same letters are not significantly different (ANOVA on arcsin√(relative catch) followed by Dunnet’s T3, p

  • Reducing the release of trans-conophthorin and comparing a GLV-blend with 1-hexanol alone, Trial 1.
    2014
    Co-Authors: Rikard C. Unelius, Christia Schiebe, Jö Ohma, Marti N. Andersso, Fredrik Schlyte
    Abstract:

    Results from field experiment in Asa, South Sweden, May − June 2006. Bars show mean relative catch per replicate ±1 standard error based on n = 21 replicates (trap rotations). Numbers below stimuli acronyms are release rates (mg/day; Table 1). Acronyms: Ph (+) = Ips typographus pheromone blend (ca 57 mg/day); Vn = (–)-Verbenone; GLV = (3Z)-hexen-1-ol, (2E)-hexen-1-ol, 1-hexanol (6 mg/day for a 1∶1∶1 mixture), C6 = 1-hexanol; tC = trans-conophthorin. Bars with same letters are not significantly different (ANOVA on arcsin√(relative catch), followed by Dunnet’s T3 multiple range post-hoc test, p

Jö Ohma - One of the best experts on this subject based on the ideXlab platform.

  • Non-host volatile blend optimization for forest protection against the European spruce bark beetle, Ips typographus
    Public Library of Science, 2015
    Co-Authors: Unelius C. Rikard, Schiebe Christia, Andersson, Marti N, Jö Ohma, Schlyte Fredrik
    Abstract:

    Conifer feeding bark beetles (Coleoptera, Curculionidae, Scolytinae) pose a serious economic threat to forest production. Volatiles released by non-host angiosperm plants (so called non-host volatiles, NHV) have been shown to reduce the risk of attack by many bark beetle species, including the European spruce bark beetle, Ips typographus. However, the most active blend for I. typographus, containing three green leaf volatiles (GLVs) in addition to the key compounds trans-conophthorin (tC) and Verbenone, has been considered too expensive for use in large-scale management. To lower the cost and improve the applicability of NHV, we aim to simplify the blend without compromising its anti-attractant potency. Since the key compound tC is expensive in pure form, we also tested a crude version: technical grade trans-conophthorin (T-tC). In another attempt to find a more cost effective substitute for tC, we evaluated a more readily synthesized analog: dehydro-conophthorin (DHC). Our results showed that 1-hexanol alone could replace the three-component GLV blend containing 1-hexanol, (3Z)-hexen-1-ol, and (2E)-hexen-1-ol. Furthermore, the release rate of tC could be reduced from 5 mg/day to 0.5 mg/day in a blend with 1-hexanol and (-)-Verbenone without compromising the anti-attractant activity. We further show that T-tC was comparable with tC, whereas DHC was a less effective anti-attractant. DHC also elicited weaker physiological responses in the tC-responding olfactory receptor neuron class, providing a likely mechanistic explanation for its weaker anti-attractive effect. Our results suggest a blend consisting of (-)-Verbenone, 1-hexanol and technical trans-conophthorin as a cost-efficient anti-attractant for forest protection against I. typographus.The studies in Asa were granted by SJFR and Formas (Nr 24.0293/98 and 2006-1064) and by the foundation Oscar och Lilli Lamms Minne. The University of Kalmar (now Linnaeus University) is acknowledged for financial support to RU and BB. The Swedish University of Agricultural Sciences in Alnarp is acknowledged for financial support to CS, FS. MNA was funded by FORMAS project #230-2005-1778 ‘‘Semiochemical diversity and insect dynamics’’ and by the Swedish Research Council (VR) during manuscript preparation

  • Non-host volatile blend optimization for forest protection against the European Spruce Bark Beetle, Ips typographus
    'Public Library of Science (PLoS)', 2014
    Co-Authors: Unelius, Rikard C, Andersson, Marti N, Schiebe Christia, Jö Ohma, Schlyte Fredrik
    Abstract:

    Conifer feeding bark beetles (Coleoptera, Curculionidae, Scolytinae) pose a serious economic threat to forest production. Volatiles released by non-host angiosperm plants (so called non-host volatiles, NHV) have been shown to reduce the risk of attack by many bark beetle species, including the European spruce bark beetle, Ips typographus. However, the most active blend for I. typographus, containing three green leaf volatiles (GLVs) in addition to the key compounds trans-conophthorin (tC) and Verbenone, has been considered too expensive for use in large-scale management. To lower the cost and improve the applicability of NHV, we aim to simplify the blend without compromising its anti-attractant potency. Since the key compound tC is expensive in pure form, we also tested a crude version: technical grade trans-conophthorin (T-tC). In another attempt to find a more cost effective substitute for tC, we evaluated a more readily synthesized analog: dehydroconophthorin (DHC). Our results showed that 1-hexanol alone could replace the three-component GLV blend containing 1- hexanol, (3Z)-hexen-1-ol, and (2E)-hexen-1-ol. Furthermore, the release rate of tC could be reduced from 5 mg/day to 0.5 mg/day in a blend with 1-hexanol and (–)-Verbenone without compromising the anti-attractant activity. We further show that T-tC was comparable with tC, whereas DHC was a less effective anti-attractant. DHC also elicited weaker physiological responses in the tC-responding olfactory receptor neuron class, providing a likely mechanistic explanation for its weaker anti-attractive effect. Our results suggest a blend consisting of (–)-Verbenone, 1-hexanol and technical transconophthorin as a cost-efficient anti-attractant for forest protection against I. typographus

  • Test of dehydro-conophthorin, Trial 3.
    2014
    Co-Authors: Rikard C. Unelius, Christia Schiebe, Jö Ohma, Marti N. Andersso, Fredrik Schlyte
    Abstract:

    Results from field trapping test in Parismåla, May 2008. Bars show mean relative catch per replicate ±1 standard error based on n = 15 replicates. Numbers below stimuli acronyms are release rates (mg/day). Acronyms: Ph = pheromone (IT Ecolure Tubus, Fytofarm, Slovakia); Vn = (–)-Verbenone; C6 = 1-hexanol; tC = trans-conophthorin; DHC = dehydro-conophthorin. Bars with same letters are not significantly different (ANOVA on arcsin√(relative catch) followed by Tukey’s HSD multiple range post-hoc test, p

  • Comparison of trap catch reduction by trans-conophthorin versus technical grade trans-conophthorin, Trial 2.
    2014
    Co-Authors: Rikard C. Unelius, Christia Schiebe, Jö Ohma, Marti N. Andersso, Fredrik Schlyte
    Abstract:

    Results from field trapping test in Germundslycke, May – June 2007. Bars show mean relative catch per replicate ±1 standard error based on n = 81 (n = 80 for Vn; n = 79 for C6 at 60 mg/day) replicates. Numbers below stimuli acronyms are release rates (mg/day; Table 1). Acronyms: Ph = pheromone (commercial lure from Chemtica); Vn = (–)-Verbenone; C6 = 1-hexanol; tC = trans-conophthorin; T-tC = technical grade trans-conophthorin. Bars with same letters are not significantly different (ANOVA on arcsin√(relative catch) followed by Dunnet’s T3, p

  • Reducing the release of trans-conophthorin and comparing a GLV-blend with 1-hexanol alone, Trial 1.
    2014
    Co-Authors: Rikard C. Unelius, Christia Schiebe, Jö Ohma, Marti N. Andersso, Fredrik Schlyte
    Abstract:

    Results from field experiment in Asa, South Sweden, May − June 2006. Bars show mean relative catch per replicate ±1 standard error based on n = 21 replicates (trap rotations). Numbers below stimuli acronyms are release rates (mg/day; Table 1). Acronyms: Ph (+) = Ips typographus pheromone blend (ca 57 mg/day); Vn = (–)-Verbenone; GLV = (3Z)-hexen-1-ol, (2E)-hexen-1-ol, 1-hexanol (6 mg/day for a 1∶1∶1 mixture), C6 = 1-hexanol; tC = trans-conophthorin. Bars with same letters are not significantly different (ANOVA on arcsin√(relative catch), followed by Dunnet’s T3 multiple range post-hoc test, p

Christia Schiebe - One of the best experts on this subject based on the ideXlab platform.

  • Non-Host Volatile Blend Optimization for Forest Protection against the European Spruce Bark Beetle, Ips typographus
    2016
    Co-Authors: Rikard C. Unelius, Christia Schiebe, Marti N. Andersson¤b, Fredrik Schlyte
    Abstract:

    Conifer feeding bark beetles (Coleoptera, Curculionidae, Scolytinae) pose a serious economic threat to forest production. Volatiles released by non-host angiosperm plants (so called non-host volatiles, NHV) have been shown to reduce the risk of attack by many bark beetle species, including the European spruce bark beetle, Ips typographus. However, the most active blend for I. typographus, containing three green leaf volatiles (GLVs) in addition to the key compounds trans-conophthorin (tC) and Verbenone, has been considered too expensive for use in large-scale management. To lower the cost and improve the applicability of NHV, we aim to simplify the blend without compromising its anti-attractant potency. Since the key compound tC is expensive in pure form, we also tested a crude version: technical grade trans-conophthorin (T-tC). In another attempt to find a more cost effective substitute for tC, we evaluated a more readily synthesized analog: dehydro-conophthorin (DHC). Our results showed that 1-hexanol alone could replace the three-component GLV blend containing 1-hexanol, (3Z)-hexen-1-ol, and (2E)-hexen-1-ol. Furthermore, the release rate of tC could be reduced from 5 mg/day to 0.5 mg/day in a blend with 1-hexanol and (–)-Verbenone without compromising the anti-attractant activity. We further show that T-tC was comparable with tC, whereas DHC was a less effective anti-attractant. DHC also elicited weaker physiological responses in the tC-responding olfactory receptor neuron class, providing a likely mechanistic explanation for its weaker anti-attractive effect. Our results suggest a blend consisting of (–)-Verbenone, 1-hexanol and technical trans

  • Test of dehydro-conophthorin, Trial 3.
    2014
    Co-Authors: Rikard C. Unelius, Christia Schiebe, Jö Ohma, Marti N. Andersso, Fredrik Schlyte
    Abstract:

    Results from field trapping test in Parismåla, May 2008. Bars show mean relative catch per replicate ±1 standard error based on n = 15 replicates. Numbers below stimuli acronyms are release rates (mg/day). Acronyms: Ph = pheromone (IT Ecolure Tubus, Fytofarm, Slovakia); Vn = (–)-Verbenone; C6 = 1-hexanol; tC = trans-conophthorin; DHC = dehydro-conophthorin. Bars with same letters are not significantly different (ANOVA on arcsin√(relative catch) followed by Tukey’s HSD multiple range post-hoc test, p

  • Comparison of trap catch reduction by trans-conophthorin versus technical grade trans-conophthorin, Trial 2.
    2014
    Co-Authors: Rikard C. Unelius, Christia Schiebe, Jö Ohma, Marti N. Andersso, Fredrik Schlyte
    Abstract:

    Results from field trapping test in Germundslycke, May – June 2007. Bars show mean relative catch per replicate ±1 standard error based on n = 81 (n = 80 for Vn; n = 79 for C6 at 60 mg/day) replicates. Numbers below stimuli acronyms are release rates (mg/day; Table 1). Acronyms: Ph = pheromone (commercial lure from Chemtica); Vn = (–)-Verbenone; C6 = 1-hexanol; tC = trans-conophthorin; T-tC = technical grade trans-conophthorin. Bars with same letters are not significantly different (ANOVA on arcsin√(relative catch) followed by Dunnet’s T3, p

  • Reducing the release of trans-conophthorin and comparing a GLV-blend with 1-hexanol alone, Trial 1.
    2014
    Co-Authors: Rikard C. Unelius, Christia Schiebe, Jö Ohma, Marti N. Andersso, Fredrik Schlyte
    Abstract:

    Results from field experiment in Asa, South Sweden, May − June 2006. Bars show mean relative catch per replicate ±1 standard error based on n = 21 replicates (trap rotations). Numbers below stimuli acronyms are release rates (mg/day; Table 1). Acronyms: Ph (+) = Ips typographus pheromone blend (ca 57 mg/day); Vn = (–)-Verbenone; GLV = (3Z)-hexen-1-ol, (2E)-hexen-1-ol, 1-hexanol (6 mg/day for a 1∶1∶1 mixture), C6 = 1-hexanol; tC = trans-conophthorin. Bars with same letters are not significantly different (ANOVA on arcsin√(relative catch), followed by Dunnet’s T3 multiple range post-hoc test, p

Xi Zhao - One of the best experts on this subject based on the ideXlab platform.

  • Ultralow Loading Cobalt-Based Nanocatalyst for Benign and Efficient Aerobic Oxidation of Allylic Alcohols and Biobased Olefins
    AMER CHEMICAL SOC, 2019
    Co-Authors: Xi Zhao, Ya Zhou, Huang Kua, Li Changzhi, Tao Duan-jia
    Abstract:

    The synthesis of alpha,beta-unsaturated ketones from aerobic oxidation of allylic alcohols and biobased olefins serves as an important topic in green and sustainable chemistry. In this work, we report the utilization of a sacrificial template ZIF-8 for preparation of mesoporous Co-0.05/N-C material with an ultralow cobalt loading of 0.05 wt %, in which the excellent catalytic performance in aerobic oxidation of alpha-pinene and cinnamyl alcohol was achieved with an 85% yield of Verbenone and a yield of cinnamaldehyde, respectively. The results of control experiments and several characterization investigations further illustrate that the sacrificial template ZIF-8 plays a key role to disperse well metallic cobalt in the Co-0.05/N-C-800 catalyst and an appropriate cobalt content of 0.05 wt % is beneficial for benign and efficient aerobic oxidation of various allylic alcohols and biobased olefins. In addition, the Co0.05/N-C-800 catalyst also exhibited good stability and reusability for recovering and reusing at least six times without obvious decrease in catalytic activity. The presented efficient nanocatalyst thus triggers facile synthesis of a series of alpha,beta-unsaturated aldehydes/ketones in high yields

  • Ultralow Loading Cobalt-Based Nanocatalyst for Benign and Efficient Aerobic Oxidation of Allylic Alcohols and Biobased Olefins
    2018
    Co-Authors: Xi Zhao, Ya Zhou, Kua Huang, Duan-jia Tao
    Abstract:

    The synthesis of α,β-unsaturated ketones from aerobic oxidation of allylic alcohols and biobased olefins serves as an important topic in green and sustainable chemistry. In this work, we report the utilization of a sacrificial template ZIF-8 for preparation of mesoporous Co0.05/N–C material with an ultralow cobalt loading of 0.05 wt %, in which the excellent catalytic performance in aerobic oxidation of α-pinene and cinnamyl alcohol was achieved with an 85% yield of Verbenone and a yield of cinnamaldehyde, respectively. The results of control experiments and several characterization investigations further illustrate that the sacrificial template ZIF-8 plays a key role to disperse well metallic cobalt in the Co0.05/N–C-800 catalyst and an appropriate cobalt content of 0.05 wt % is beneficial for benign and efficient aerobic oxidation of various allylic alcohols and biobased olefins. In addition, the Co0.05/N–C-800 catalyst also exhibited good stability and reusability for recovering and reusing at least six times without obvious decrease in catalytic activity. The presented efficient nanocatalyst thus triggers facile synthesis of a series of α,β-unsaturated aldehydes/ketones in high yields

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