The red palm mite, Raoiella indica Hirst (Tenuipalpidae), has mainly been registered on palm species (Arecaceae), and its expansion in Brazil has the potential to cause significant negative impact on cultivated as well as native palms. Here, we evaluate the potential of native palms from Northeast Brazil to act as hosts of R. indica. Specifically, we used in situ free-choice and confinement tests, in which sections of palm leaves/leaflets of various species were experimentally infested with R. indica. We tested the following species: Acrocomia aculeata, Acrocomia intumescens, Allagoptera caudescens, Attalea funifera, Attalea oleifera, Bactris acanthocarpa var. acanthocarpa, Bactris ferruginea, Bactris glassmanii, Bactris hirta var. spruceana, Bactris pickelii, Copernicia prunifera, Desmoncus orthacanthos, Desmoncus polyacanthos, Syagrus coronata and Syagrus schizophylla. All of these were compared with the mite’s preferred host, the coconut palm, Cocos nucifera. In the free-choice test, both male and female R. indica preferred C. nucifera in comparison to each of the native palms. In the confinement test, we observed significant differences in the survivorship between mites on native palms and those on coconut palms after the second day of infestation. By the fifth day, survivorship of mites on the native palms was almost always significantly lower than on C. nucifera (excepting for C. prunifera). We conclude that, among all the native palms evaluated, only the carnauba palm (C. prunifera) is at risk from R. indica. This result is relevant as this palm is an economically important species in the region.

中文翻译：

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巴西东北部的天然棕榈树种可能会成为入侵性螨Ra（Raoiella indica）（Acari：Tenuipalpidae）的寄主。

红棕螨印度小oi（Raoiella indica Hirst）（藤雀科）主要在棕榈树种（科）上注册，其在巴西的扩张有可能对栽培棕榈和本地棕榈产生重大负面影响。在这里，我们评估了巴西东北部天然棕榈树作为印度of的寄主的潜力。具体来说，我们使用了原位自由选择和限制测试，其中各种物种的棕榈叶/小叶的部分在实验上都受到了印度黑麦草的侵染。我们测试了以下种类：Acrocomia aculeata，Acrocomia intumescens，Allagoptera caudescens，Attalea funifera，Attalea油茶，仙人掌棘变种。棘皮果，Bactris ferruginea，Bactris glassmanii，Bactris hirta var。spruceana，Bactris pickelii，Copernicia prunifera，Desmoncus orthacanthos，Desmoncus polyacanthos，Syagrus coronata和Syagrus schizophylla。所有这些都与螨虫的首选寄主，椰子树，椰子树（Cocos nucifera）进行了比较。在自由选择测试中，男性和女性印度。均优先选择C. nucifera。与每个本地棕榈树相比。在封闭试验中，我们观察到在侵染第二天后，天然棕榈和椰子棕榈上螨的存活率存在显着差异。到了第五天，在本机手掌螨的存活率几乎总是比显著降低C.莲（除为Ç。prunifera）。我们得出的结论是，在所有评估过的本地棕榈中，只有巴西棕榈（C. prunifera）受到印度R的威胁。这个结果是有意义的，因为这种棕榈是该地区的重要经济物种。