Guarino Salvatore, Colazza Stefano, Peri Ezio, Bue Paolo Lo, Germanà Maria Pia, Kuznetsova Tatiana, Gindin Galina, Soroker Victoria
Dipartimento di Scienze Agrarie e Forestali, Università degli Studi di Palermo, Palermo, Italy.
Istituto per la Protezione Sostenibile delle Piante (IPSP), Sesto Fiorentino, Florence, Italy.
Pest Manag Sci. 2015 Dec;71(12):1605-10. doi: 10.1002/ps.3966. Epub 2015 Jan 20.
Populations of red palm weevil (RPW), a severe pest of palms in Mediterranean countries, might be limited by semiochemical-based behaviour-disrupting methods. We evaluated the effects of electroantennogram (EAG)-active plant volatiles on the behaviour of RPWs from Italy and Israel. In field experiments, α-pinene, citronellol, geraniol, citral and 1-octen-3-ol were tested for their ability to disrupt attraction to pheromone-kairomone and molasses baited traps. Those that were found to be disruptive in the field were evaluated in a laboratory choice bioassay in individual cages for their effect on RPW female feeding and oviposition.
Field experiments showed reduced captures in traps loaded with geraniol (-57%), 1-octen-3-ol (-50%) or α-pinene (-45% to -60%); captures in citronellol- or citral-loaded traps did not differ from control. In laboratory experiments, 1-octen-3-ol was the most potent behaviour-modifying compound, eliciting a significant/marginally significant reduction in both feeding and oviposition at the lowest dose tested in both populations. Geraniol generally caused a strong reduction in feeding and oviposition at each dose tested (Israel), or at the highest dose (Italy). α-Pinene caused some reduction in feeding activity at the highest dose tested (Italy), but no consistent repellency (Israel).
Field and laboratory data suggest the potential for the use of 1-octen-3-ol, geraniol and α-pinene for RPW population management.
红棕象甲是地中海国家棕榈树的一种严重害虫，其种群数量可能受到基于信息素的行为干扰方法的限制。我们评估了对意大利和以色列的红棕象甲有触角电位（EAG）活性的植物挥发物对其行为的影响。在田间试验中，测试了α-蒎烯、香茅醇、香叶醇、柠檬醛和1-辛烯-3-醇干扰对性信息素-利它素和糖蜜诱饵诱捕器吸引力的能力。在个体饲养笼中进行的实验室选择生物测定中，评估了那些在田间发现具有干扰作用的物质对红棕象甲雌虫取食和产卵的影响。
田间试验表明，装有香叶醇（-57%）、1-辛烯-3-醇（-50%）或α-蒎烯（-45%至-60%）的诱捕器捕获量减少；装有香茅醇或柠檬醛的诱捕器捕获量与对照无差异。在实验室试验中，1-辛烯-3-醇是最有效的行为改变化合物，在两个种群测试的最低剂量下，取食和产卵均显著/略有减少。香叶醇通常在每个测试剂量下（以色列）或最高剂量下（意大利）导致取食和产卵大幅减少。α-蒎烯在测试的最高剂量下（意大利）导致取食活动有所减少，但在以色列没有一致的驱避作用。
田间和实验室数据表明，1-辛烯-3-醇、香叶醇和α-蒎烯在红棕象甲种群管理中具有应用潜力。
