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The effect of host condition on adult emerald ash borer (Agrilus planipennis) performance
Forestry ( IF 2.8 ) Pub Date : 2019-04-10 , DOI: 10.1093/forestry/cpz008
Chris J K MacQuarrie 1
Affiliation  

Abstract
For invasive species, how successful adult insects are in various life history processes influences how well invaders can colonize and reproduce. Emerald ash borer (EAB) is a significant invasive forest insect in North America that has killed millions of ash trees. While the effect of host condition on larval performance has been examined, the effect of host condition on adult performance has not. In this study, healthy trees were girdled to simulate poor host condition and then both artificially and naturally infested by EAB. The ensuing adults that developed and emerged were then assessed for their success in terms of number, lifespan, size, mating success and fecundity. Girdling reduced the number of insects that emerged from trees, and was associated with reduced lifespan, but had confounding effects on mating success and fecundity. Adult size was positively affected by girdling but negatively affected by crowding that larvae experienced during development. This suggests that it is not necessary to consider host condition when assessing the risk of EAB, as the dynamics of populations attacking poor-condition trees will be the same as the dynamics populations attacking healthy trees.


中文翻译:

寄主条件对成年翡翠bore虫(Agrilus planipennis)性能的影响

摘要
对于入侵物种,成虫在各种生命史过程中的成功程度会影响入侵者的定殖和繁殖能力。翡翠灰bore(EAB)是北美的一种重要的入侵性森林昆虫,已经杀死了数百万棵灰树。尽管已经研究了宿主条件对幼虫性能的影响,但宿主条件对成年小鼠性能的影响却没有。在这项研究中,对健康树木进行环剥以模拟恶劣的寄主状况,然后通过EAB对其进行人工和自然侵染。然后从数量,寿命,大小,交配成功和繁殖力等方面评估随后发育和出现的成年成年人的成功。环剥减少了从树上出现的昆虫的数量,并减少了寿命,但对交配成功和繁殖力产生了混淆作用。成年个体的大小受到环剥的积极影响,但受到幼虫在发育过程中经历的拥挤的负面影响。这表明在评估EAB风险时无需考虑宿主条件,因为攻击状况较差的树木的种群动态与攻击健康树木的种群动态相同。
更新日期:2020-04-17
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