The study determined variations in incidence, severity and damage of Glycaspis brimblecombei among Eucalyptus species and ecological zones, and the interaction between Eucalyptus species and ecological zones. Additionally, the study determined variation in pest abundance between the upper, middle and lower parts of the tree crown. The study was conducted in six districts located in four ecological zones in Malawi. Eucalyptus stands established in 2014–2016 or coppices from trees cut in that period were sampled for G. brimblecombei infestation. A significant interaction was found between Eucalyptus species and ecological zones on G. brimblecombei infestation. Significant differences were observed between ecological zones in G. brimblecombei infestation with lowest incidence, severity and damage being found in the cooler ecological zone M. Eucalyptus camaldulensis and Eucalyptus tereticornis showed high susceptibility to G. brimblecombei compared to Eucalyptus grandis. There were no significant differences in abundance between the upper, middle and lower tree crown parts of each Eucalyptus species. Control efforts for this psyllid should focus on breeding and planting of resistant Eucalyptus varieties in specifically recommended sites. The uniform distribution of the pest on different tree crown parts implies that use of contact insecticides on a large scale would be tedious and expensive.

中文翻译：

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在马拉维选定的生态区中，有3种桉树物种感染了青草（Glycaspis brimblecombei）（半翅目：木虱科）

该研究确定发病率，严重度和损伤变化Glycaspis brimblecombei间桉树物种和生态区，和之间的相互作用桉树物种和生态区域。此外，该研究还确定了树冠上部，中部和下部之间有害生物丰度的变化。这项研究是在马拉维四个生态区的六个地区进行的。在2014–2016年建立的桉树林或从该时期砍伐的林木中取样来进行青霉菌侵染。发现桉树物种与G. brimblecombei生态区之间存在显着的相互作用。侵扰。在生态区之间观察到的差异显著G. brimblecombei侵染发生率最低，严重性和损坏在冷却器生态区M.被发现赤桉和细叶桉表现出较高的敏感性brimblecombei G.相比巨桉。每种桉树树种的上部，中部和下部树冠部分之间的丰度没有显着差异。该木虱的控制工作应集中在抗性桉树的繁殖和种植上在特别推荐的网站上添加品种。有害生物在不同树冠部分的均匀分布意味着大规模使用接触杀虫剂既繁琐又昂贵。