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首页> 外文期刊>Nematropica >HOST STATUS OF WOODY ORNAMENTAL PLANTS NATIVE TO SOUTHEASTERN U.S.A. TO THREE MELOIDOGYNE SPECIES
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HOST STATUS OF WOODY ORNAMENTAL PLANTS NATIVE TO SOUTHEASTERN U.S.A. TO THREE MELOIDOGYNE SPECIES

机译：美国东南部至三个扇贝类木本观赏植物的居留状况

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Use of indigenous (native) plants in landscapes is of interest because of their perceived low maintenance requirements, and possible resistance to pests including plant-parasitic nematodes. Meloidogyne spp. (root-knot nematodes) damage many ornamental landscape plants in the southeastern U.S.A. Infected plants may be stunted and can lose aesthetic value due to chlorosis, wilting, and leaf margin necrosis. We assessed reproduction of three root-knot nematode species, Meloidogyne arenaria, M. incognita, and M. javanica, on five plant taxa native to the southeastern U.S.A. and three non-native species commonly used in landscapes. The native taxa were: Hydrangea quercifolia 'Oakleaf,' Viburnum obovatum 'Densa,' Itea virginica 'Little Henry,' Illicium parviflorum, and Clethra alnifolia 'Ruby Spice.' The non-native shrubs were: Ligustrum japonicum 'Texanum,' Ilex crenata 'Compacta,' and Buxus microphylla 'Wintergem.' An interaction between plant taxa and Meloidogyne species was observed (P 0.0001), and galling and nematode eggs were abundant on roots of the three non-native taxa. Among the plant species tested, highest galling (10) was observed on roots of I. crenata 'Compacta' infected with M. incognita, but largest number of eggs (6,397 eggs/g of roots) was observed in plants of this cultivar inoculated with M. javanica. Few or no galls were observed on roots of the five native plant taxa, and nematode eggs were recovered only from roots of I. virginica 'Little Henry' inoculated with M. arenaria and M. javanica (13 and 20 eggs/g of roots, respectively). Weight of shoots or roots of all species was not affected by nematode inoculation. Due to lack of root gall development and little or no reproduction on the native taxa, we conclude that these are poor or non-hosts to the three species of Meloidogyne. Landscape plantings of these plants, therefore, should be recommended as alternatives in sites with soil infested by Meloidogyne arenaria, M. incognita, or M. javanica.
机译：在景观中使用本土（原生）植物是令人感兴趣的，因为它们的维护要求低，并且可能对包括植物寄生线虫在内的害虫具有抗性。根结线虫属（根结线虫）破坏了美国东南部的许多观赏园林植物。受感染的植物可能因萎黄，萎和叶缘坏死而发育迟缓，并可能失去美学价值。我们评估了三种根结线虫物种（Meloidogyne arenaria，M。incognita和Java M.javanica）在美国东南部的五种植物类群和景观中常用的三种非本土物种的繁殖情况。本地的分类单元是：八仙花绣球花（Oakleaf），荚莲荚莲（Viburnum obovatum）“登萨”（Densa），伊提琴弗吉尼亚州（Little Ithen），小花八角菊（Illicium parviflorum）和苜蓿克氏菊（Clethra alnifolia）“ Ruby Spice”。非本地灌木是：女贞，德州冬青，小叶冬青，小叶黄杨。观察到植物类群与根结线虫物种之间的相互作用（P = 0.0001），并且在三个非本地类群的根部上有大量的虫卵和线虫卵。在所测试的植物物种中，感染隐身梭状芽胞杆菌的“ I. crenata'Compacta”的根系观察到最高的咬伤（10），但是在该品种接种了该菌的植物中，观察到最大数量的卵（6,397卵/根）。 M. javanica。在五个天然植物类群的根部几乎没有或没有观察到s虫，线虫卵仅从接种了沙雷氏菌和爪哇分枝杆菌的维吉尼亚州“小亨利”的根中回收（13/20个鸡蛋/ g根，分别）。线虫接种不影响所有物种的芽或根的重量。由于缺乏根胆发育并且在天然分类单元上几乎没有繁殖或没有繁殖，我们得出的结论是，这些是Meloidogyne的三种物种的贫瘠或非寄主。因此，应建议在有南方根结线虫，隐孢子虫或爪哇分枝杆菌侵染的土壤中，将这些植物的景观种植作为替代品。

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