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<p>Botanical pesticides are environmentally friendly for pest management and safe for human health. The objective of the study was to evaluate the effectiveness of essential oils of <i>Lippia multifora</i>, <i>Lantana camara</i> and <i>Eucalyptus saligna</i> against pests of stored smoked fish, <i>Necrobia rufipes</i>, by determining their contact inhalation, repellent and persistence activities. To do this, the leaves of the plants were hydrodistilled and the chemical compositions were carried out by gas chromatography coupled with mass spectrometry. The chemical compositions of the plants <i>L. camara</i>,<i> L. multifora</i>,<i> E. saligna</i> allowed to identify mainly caryophyllene (24.38%), neral (37.54%) and (+)-α-Terpineol (16.75%) as main compounds respectively. The insecticidal effectiveness of essential oils presented by the lethal doses 50 showed that <i>L. multifora</i> is the more toxic (0.05 µL/Cm<sup>2</sup>) followed by <i>E. saligna</i> (0.10 µL/Cm<sup>2</sup>), <i>L. camara</i> (0.11 µL/Cm<sup>2</sup>). The lethal times recorded with these essential oils were lower for <i>L. multiflora</i> lethal time 50 and 100 respectively (4.62&#xa0;h, 8.91&#xa0;h), followed by <i>E. saligna</i> lethal time 50 and 100 respectively (5.05&#xa0;h, 9.35&#xa0;h) and higher with <i>L. camara</i> lethal time 50 and 100 respectively (5.74&#xa0;h, 9.87&#xa0;h). When exposed to the lethal doses 50, 100 of the oils, the tested insects displayed high repellency rates. The essential oils with the least persistence during the 24&#xa0;h of experiment were <i>L. multiflora</i> and <i>E. saligna</i>. It appears from this study that <i>L. multiflora</i> oil can be used as a botanical pesticide to control insect pests of smoked fish in storage.</p>

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Insecticidal activities and persistence of essential oils of Lippia multifora, Lantana Camara and Eucalyptus saligna against Necrobia rufipes insect pests of stored smoked fish and their chemical compositions

  • 期刊论文

  • 发表日期：

    2026年2月16日

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  • Martial Judicaël Peyieno,
  • Sammuel Raymond Tchabong,
  • Justin Djopnang Djimbie,
  • Hervé Tekou Ngunte,
  • Laurent Franz Yantcho Tahon,
  • Béranger Raoul Tamgno,
  • Marlyse Solange Leng,
  • François Tchoumbougnang

摘要

Botanical pesticides are environmentally friendly for pest management and safe for human health. The objective of the study was to evaluate the effectiveness of essential oils of Lippia multifora, Lantana camara and Eucalyptus saligna against pests of stored smoked fish, Necrobia rufipes, by determining their contact inhalation, repellent and persistence activities. To do this, the leaves of the plants were hydrodistilled and the chemical compositions were carried out by gas chromatography coupled with mass spectrometry. The chemical compositions of the plants L. camara, L. multifora, E. saligna allowed to identify mainly caryophyllene (24.38%), neral (37.54%) and (+)-α-Terpineol (16.75%) as main compounds respectively. The insecticidal effectiveness of essential oils presented by the lethal doses 50 showed that L. multifora is the more toxic (0.05 µL/Cm2) followed by E. saligna (0.10 µL/Cm2), L. camara (0.11 µL/Cm2). The lethal times recorded with these essential oils were lower for L. multiflora lethal time 50 and 100 respectively (4.62 h, 8.91 h), followed by E. saligna lethal time 50 and 100 respectively (5.05 h, 9.35 h) and higher with L. camara lethal time 50 and 100 respectively (5.74 h, 9.87 h). When exposed to the lethal doses 50, 100 of the oils, the tested insects displayed high repellency rates. The essential oils with the least persistence during the 24 h of experiment were L. multiflora and E. saligna. It appears from this study that L. multiflora oil can be used as a botanical pesticide to control insect pests of smoked fish in storage.