Hylurgus ligniperda is one of the most important quarantine forest insects associated to pine (Pinus radiate D. Don) logs exported from Chile. Methyl bromide fumigation has been the prominent control method. As the use of this synthetic insecticide leads to serious environmental problems, research to find alternative treatments is urgently needed for the Chilean forestry sector. Hence, plant secondary metabolites have been considered as an alternative for its control. Therefore, the objective of this work was to assess the feeding behavior of H. ligniperda through the artificial diet supplemented with organic fractions obtained from Cestrum parqui leaves. Organic extracts were obtained using a Soxhlet extraction. Non-choice tests were developed for testing the antifeedant activity shown by the organic fractions on adults, and 5th and 6th instar larvae of H. ligniperda. All the extracts tested elicited a decrease in the weight of unsexed H. ligniperda adults, and the effects were dose-dependent. Male beetle weight gain was reduced strongly by chloroform extracts and ethyl acetate elicited a weight increase of female and from the fifth and sixth instar larvae weight. Saponin extract elicited a reduction of the weight in male and female. Finally, the weight of both instar larvae was reduced by chloroform and saponin extract. C. parqui leaf extracts show a great potential for being used for controlling H. ligniperda and thus to diminish the use of harmful synthetic pesticide.

中文翻译：

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红毛树皮甲虫Hylurgus ligniperda上香樟叶有机组分的拒食活性

Hylurgus ligniperda 是与智利出口的松（Pinus radiate D. Don）原木相关的最重要的森林检疫昆虫之一。溴甲烷熏蒸一直是主要的控制方法。由于使用这种合成杀虫剂会导致严重的环境问题，因此智利林业部门迫切需要研究寻找替代治疗方法。因此，植物次生代谢物被认为是其控制的替代方案。因此，这项工作的目的是通过人工饮食评估木虱的摄食行为，辅以从雪松叶中获得的有机成分。使用索氏提取获得有机提取物。开发了非选择测试来测试有机部分对成年人的拒食活性，H. ligniperda 5、6龄幼虫。所有测试的提取物都引起了未进行性交的 H. ligniperda 成虫体重的减少，并且效果是剂量依赖性的。氯仿提取物大大降低了雄性甲虫的体重增加，而乙酸乙酯引起雌性甲虫体重增加以及五龄和六龄期幼虫的体重增加。皂苷提取物引起男性和女性体重减轻。最后，氯仿和皂苷提取物降低了两个龄期幼虫的重量。C. parqui 叶提取物显示出用于控制 H. ligniperda 的巨大潜力，从而减少有害合成农药的使用。氯仿提取物大大减少了雄性甲虫的体重增加，乙酸乙酯引起雌性和五龄和六龄幼虫体重的增加。皂苷提取物引起男性和女性体重减轻。最后，氯仿和皂苷提取物降低了两个龄期幼虫的重量。C. parqui 叶提取物显示出用于控制 H. ligniperda 的巨大潜力，从而减少有害合成农药的使用。氯仿提取物大大降低了雄性甲虫的体重增加，而乙酸乙酯引起雌性甲虫体重增加以及五龄和六龄期幼虫的体重增加。皂苷提取物引起男性和女性体重减轻。最后，氯仿和皂苷提取物降低了两个龄期幼虫的重量。C. parqui 叶提取物显示出用于控制 H. ligniperda 的巨大潜力，从而减少有害合成农药的使用。