Common problems of Rhododendron L. in the Central Botanical Garden of the National Academy of Sciences of Belarus

Proceedings of the National Academy of Sciences of Belarus, Biological Series Pub Date : 2022-02-01 DOI:10.29235/1029-8940-2022-67-1-43-53

L. A. Golovchenko, I. K. Volodko, N. G. Dishuk, V. Timofeeva, S. O. Stahovich, Ya. V. Kovalev

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Abstract

Rhododendrons are some of the most attractive flowering shrubs in the landscape. The article presents the results of studying the common problems of Rhododendron collection in the Central Botanical Garden of the National Academy of Sciences of Belarus, conducted in 2012-2020. There are several diseases and pests that commonly occur on rhododendrons every year. These include powdery mildew (Erysiphe azaleae), fungal leaf spots (Pestalotiopsis rhododendri, Colletotrichum gloeosporioides, Alternaria spp., Sphaerulina azaleae, Phyllosticta concentrica, Phyllosticta rhododendricola), black vine weevil (Otiorhynchus sulcatus), garden foliage beetle (Phyllopertha horticola), click beetle (Hemicrepidius niger), red spider mite (Tetranychus urticae), physiological leaf spots, oedema, winter injury, chlorosis. Less common on rhododendrons are stem diseases (Botryosphaeria dothidea, Cadophora spp., Hymenoscyphus spp.), wilt (Fusarium oxysporum), bud blight (Seifertia azaleae), leaf and flower gall (Exobasidium rhododendri), rhododendron lacebug (Stephanitis rhododendri), greenhouse whitefly (Trialeurodes vaporariorum). There were identified that all evergreen and half evergreen rhododendrons have some resistance to powdery mildew, deciduous rhododendrons are more resistant to fungal leaf spots than evergreens. Damage to rhododendrons by insect pests usually does not cause significant harm but heavy feeding results in an unsightly plants.

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白俄罗斯国家科学院中央植物园杜鹃花常见问题

杜鹃花是景观中最吸引人的开花灌木之一。本文介绍了2012-2020年对白俄罗斯国家科学院中央植物园杜鹃花馆藏常见问题的研究结果。每年都有几种常见的病虫害发生在杜鹃花上。这些疾病包括白粉病(杜鹃花赤藓)、真菌叶斑病(杜鹃花拟盘多毛藓、gloeosporioides、Alternaria spp.)、杜鹃花芽孢杆菌、集中毛枝芽孢杆菌、杜鹃花芽孢杆菌)、黑藤象鼻虫(Otiorhynchus sulcatus)、园林叶甲虫(Phyllopertha horticola)、点虱(Hemicrepidius niger)、红蜘蛛螨(Tetranychus荨麻疹)、生理叶斑病、水肿、冬季伤害、褪绿。杜鹃花上较少见的是茎病(Botryosphaeria dothidea, Cadophora spp.， Hymenoscyphus spp.)，枯萎病(Fusarium oxysporum)，芽枯病(Seifertia azaleae)，叶瘿和花瘿(Exobasidium rhododendri)，杜鹃花(Stephanitis rhododendri)，温室粉虱(Trialeurodes vaporariorum)。结果表明，所有常绿和半常绿杜鹃对白粉病均有一定的抗性，落叶杜鹃对白粉病的抗性较常绿杜鹃强。害虫对杜鹃花的伤害通常不会造成重大伤害，但大量取食会导致植物难看。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the National Academy of Sciences of Belarus, Biological Series

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