6种储粮害虫成虫对不同气味源物质的行为选择研究

    Behavioral selectivity of adults of 6 stored-grain insect species for different odorant compounds

      摘要
    • 摘要: 利用挥发性活性物质诱集储粮害虫在仓储害虫种群动态监测及诱控技术应用中具有重要作用。采用Y型嗅觉仪,测定了7种气味源物质(2-乙基己醇、茉莉酮、苯甲酸-2-乙基己酯、α-紫罗兰酮、β-紫罗兰酮、β-大马酮和丁香酚)在5个剂量梯度下对6种储粮害虫成虫(米象(Sitophilus oryzae)、赤拟谷盗(Tribolium castaneum)、烟草甲(Lasioderma serricorne)、锈赤扁谷盗(Cryptolestes ferrugineus)、杂拟谷盗(Tribolium confusum)和玉米象(Sitophilus zeamais))的行为选择性。结果表明,6种储粮害虫成虫对7种气味源物质的行为响应呈现虫种差异及一定的剂量依赖性。米象对5 μg/cm2滤纸苯甲酸-2-乙基己酯以及0.05 μg/cm2滤纸茉莉酮和α-紫罗兰酮的选择反应率较高,分别为78.74%、77.58%和76.71%;赤拟谷盗整体趋性较弱,但对0.5 μg/cm2滤纸β-大马酮和0.005 μg/cm2滤纸茉莉酮的反应相对较高,反应率和选择反应率分别为81.67%、63.33%和50.00%、61.76%;烟草甲对0.05 μg/cm2滤纸β-大马酮、0.005 μg/cm2滤纸α-紫罗兰酮和0.005 μg/cm2滤纸苯甲酸-2-乙基己酯较敏感,其选择反应率分别为76.16%、69.20%和62.58%;锈赤扁谷盗对0.05 μg/cm2滤纸苯甲酸-2-乙基己酯反应较强,反应率和选择反应率分别为73.33%和73.70%;杂拟谷盗对0.5 μg/cm2滤纸β-大马酮和0.05 μg/cm2滤纸茉莉酮表现出较强趋性,选择反应率分别为62.27%和62.35%;玉米象对5 μg/cm2滤纸苯甲酸-2-乙基己酯、0.05 μg/cm2滤纸α-紫罗兰酮和5 μg/cm2滤纸茉莉酮响应较强,选择反应率分别为81.11%、79.01%和78.71%。总体而言,多数供试害虫对候选气味源物质的较高反应处理集中在0.005~0.5 μg/cm2滤纸范围内,但部分化合物在5 μg/cm2滤纸下仍表现出较高的选择反应率。研究结果可为储粮害虫引诱剂的定向筛选、适宜剂量优化及绿色监测防控技术研发提供理论依据。

       

      Abstract: Utilizing volatile bioactive compounds to trap stored-grain insects plays a vital role in population dynamic monitoring and the application of trap-and-kill control technologies for stored grains. In this study, a Y-tube olfactometer was adopted to determine the behavioral selectivity of adults of six stored-grain insect species, including Sitophilus oryzae, Tribolium castaneum, Lasioderma serricorne, Cryptolestes ferrugineus, Tribolium confusum, and Sitophilus zeamais, to seven odorant compounds (2-ethylhexanol, jasmone, 2-ethylhexyl benzoate, α-ionone, β-ionone, β-damascenone, and eugenol), at five dose levels. The results showed that the adults of the six stored-grain insect species exhibited species-specific behavioral responses to the seven odorant compounds, with a certain degree of dose dependence.The results indicated that the behavioral responses of adults of the six stored-grain insect species to the seven odorant compounds exhibited significant interspecific differences and obvious concentration dependence.S. oryzae exhibited high choice rates to 2-ethylhexyl benzoate (5 μg/cm2 filter paper), jasmone (0.05 μg/cm2), and α-ionone (0.05 μg/cm2), with corresponding choice rates of 78.74%, 77.58%, and 76.71%, respectively. T. castaneum displayed weak overall tropism, yet it had relatively strong responses to β-damascenone (0.5 μg/cm2) and jasmone (0.005 μg/cm2); the corresponding response rate and choice rate reached 81.67% and 63.33%, 50.00% and 61.76%, respectively. L. serricorne was sensitive to β-damascenone (0.05 μg/cm2), α-ionone (0.005 μg/cm2), and 2-ethylhexyl benzoate (0.005 μg/cm2), with choice rates of 76.16%, 69.20%, and 62.58%, respectively. C. ferrugineus produced strong responses to 2-ethylhexyl benzoate (0.05 μg/cm2), with a response rate of 73.33% and choice rate of 73.70%. T. confusum presented strong tropism to β-damascenone (0.5 μg/cm2) and jasmone (0.05 μg/cm2), with choice rates of 62.27% and 62.35%, respectively. S. zeamais exhibited prominent responses to 2-ethylhexyl benzoate (5 μg/cm2), α-ionone (0.05 μg/cm2), and jasmone (5 μg/cm2), with choice rates of 81.11%, 79.01%, and 78.71%, respectively. Overall, most treatments inducing strong insect responses fell within the concentration range of 0.005-0.5 μg/cm2 on filter paper, while several compounds still maintained high choice rates at the concentration of 5 μg/cm2. These findings provide a basis for the targeted screening of attractants, dose optimization, and development of green monitoring, prevention and control technologies for stored-grain insects.

       

      • HTML全文
      • 参考文献(16)
      • 相关文章
      • 施引文献
    • 资源附件(0)

    /

    返回文章
    返回