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Options for managing chrysomelid leaf beetles in Australian eucalypt plantations: reducing the chemical footprint

机译:在澳大利亚桉树人工林中管理金龟子叶甲的选择:减少化学足迹

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In Australia, eucalypt plantations require management to prevent economic damage by native chrysomelid leaf beetles, generally by aerially spraying a broad-spectrum insecticide. These beetles also pose a serious threat to plantations in other countries. Various alternatives, both landscape' and control' options, for managing leaf beetles were reviewed and evaluated by a panel of experts. Options were scored on effectiveness, feasibility for use, impact on the environment, perceived social acceptability (including by certification bodies) and perceived cost. None of the options were scored as well as broad-spectrum insecticide for effectiveness, feasibility and perceived cost, although virtually all of the other options scored better for environmental and social outcomes. The highest ranked options were the landscape' option of tree improvement to reduce susceptibility to insect attack, and the control' option of attract-and-kill traps. The next three ranks were two landscape' options aimed at enhancing the effectiveness of natural enemy populations by conserving their overwintering sites and their alternative food and hosts, and then silvicultural management. The best strategy for an Integrated Pest Management programme would be a combination of landscape' options to reduce the frequency of pest outbreaks and, if outbreaks occur, spraying with biological insecticides until attract-and-kill traps become available, possibly in combination with repellent sprays in a push-pull strategy. If control measures fail to prevent damaging defoliation, plantations could be fertilized to encourage recovery. Because most of the alternative options are not yet available, many research directions were identified, with the highest priorities being to develop plantation stock that is less susceptible to defoliation and to develop attractants for leaf beetles.
机译:在澳大利亚,桉树人工林需要进行管理,以防止当地的金龟子叶甲虫对经济造成损害,通常是通过空中喷洒广谱杀虫剂来进行的。这些甲虫还对其他国家的种植园构成了严重威胁。由专家小组审查和评估了用于管理叶甲虫的多种选择,包括“景观”和“控制”选项。在有效性,使用的可行性,对环境的影响,可感知的社会接受度(包括认证机构)和可感知的成本方面对选项进行评分。在有效性,可行性和可感知的成本方面,没有一个选项和广谱杀虫剂获得评分,尽管实际上所有其他选项在环境和社会成果方面得分更高。排名最高的选项是景观选择树木以减少对昆虫的侵袭的敏感性,而控制选项则选择诱杀陷阱。接下来的三个等级是两个景观选择,旨在通过保护其越冬地点,替代食物和寄主,然后进行造林管理来提高天敌种群的效力。病虫害综合防治计划的最佳策略是结合景观选择,以减少虫害暴发的频率;如果发生暴发,则应喷洒生物杀虫剂,直到有诱杀陷阱时才可使用,可能还可以结合驱蚊喷剂在推挽策略中。如果控制措施未能防止破坏性的落叶,则可以对人工林施肥以促进恢复。由于大多数替代方案尚不可用,因此确定了许多研究方向,其中最优先的重点是开发不易脱叶的人工林和开发甲虫引诱剂。

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