{"id":14345,"date":"2019-03-16T12:33:55","date_gmt":"2019-03-16T11:33:55","guid":{"rendered":"https:\/\/www.plantenplagen.nl\/plantenplagen\/rose\/"},"modified":"2023-12-11T14:55:12","modified_gmt":"2023-12-11T13:55:12","slug":"rose","status":"publish","type":"encyclopedia","link":"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/rose\/","title":{"rendered":"Rose"},"content":{"rendered":"<div class=\"wpb-content-wrapper\" id=\"wpb-content-root\"><p>[vc_row][vc_column width=&rdquo;2\/3&Prime;][vc_column_text el_id=&rdquo;topentry&rdquo; el_class=&rdquo;topentry&rdquo;]Rose, shrub, belonging to the rose family. Wild or botanical roses have their origins in the temperate regions of the northern hemisphere.<br>\n<!--more-->[\/vc_column_text][\/vc_column][vc_column width=&rdquo;1\/3&Prime;][\/vc_column][\/vc_row][vc_row content_placement=&rdquo;middle&rdquo; css=&rdquo;.vc_custom_1627123481876{padding-top: 0px !important;padding-right: 5px !important;padding-bottom: 0px !important;padding-left: 5px !important;background-color: #ccffff !important;border-radius: 20px !important;}&rdquo; el_id=&rdquo;mobile&rdquo;][vc_column offset=&rdquo;vc_hidden-lg vc_hidden-md vc_hidden-sm&rdquo;][vc_column_text css=&rdquo;.vc_custom_1627123409680{padding: 0px !important;border: 0px initial !important;}&rdquo; el_id=&rdquo;mobiel&rdquo;]<\/p>\n<p style=\"text-align: center;\"><span style=\"color: #000099;\">You are viewing the mobile-adapted version of the page.<\/span><br>\n<span style=\"color: #000099;\">The one for tablets, laptop and desktop also provides general information, such as origin, toxicity and cultivation.<\/span><\/p>\n<p>[\/vc_column_text][\/vc_column][\/vc_row][vc_row gap=&rdquo;35&Prime; css=&rdquo;.vc_custom_1532162142715{background-color: #e6e6e6 !important;}&rdquo;][vc_column width=&rdquo;1\/2&Prime; offset=&rdquo;vc_hidden-xs&rdquo;][vc_single_image image=&rdquo;3649&Prime; img_size=&rdquo;medium&rdquo; add_caption=&rdquo;yes&rdquo; style=&rdquo;vc_box_rounded&rdquo; onclick=&rdquo;img_link_large&rdquo;][vc_column_text el_id=&rdquo;entrytxt&rdquo; el_class=&rdquo;entrytxt&rdquo; css=&rdquo;.vc_custom_1552735203990{padding-left: 10px !important;}&rdquo;]<\/p>\n<ul>\n<li>Roses are not poisonous; jam is made from the rose hips of the beach rose <em>(Rosa rugosa)<\/em>.<\/li>\n<\/ul>\n<p>[\/vc_column_text][\/vc_column][vc_column width=&rdquo;1\/2&Prime; css=&rdquo;.vc_custom_1649260557912{background-color: #e6e6e6 !important;}&rdquo; offset=&rdquo;vc_hidden-xs&rdquo;][vc_column_text el_id=&rdquo;topentry&rdquo; el_class=&rdquo;topentry&rdquo;]<strong>Rose<\/strong> &ndash; <em>(Rosa)<\/em>, shrub, belonging to the rose family <em>(Rosaceae)<\/em>. Wild or botanical roses have their origins in the temperate regions of the northern hemisphere. Over 100 species of botanical roses form the basis of the more than 13,000 <abbr title=\"varieties\">cultivars<\/abbr>. That number increases every year.<br>\nThe botanical roses dog rose <em>(Rosa canina)<\/em>, sweetbriar rose <em>(Rosa rubiginosa)<\/em> and burnet rose <em>(rosa pimpinellifolia)<\/em> still populate ruins, native gardens and wastelands.<br>\nRoses like nutritious soil (light clay is preferred) and a sheltered spot in full sun. In drought, water promptly, as roses tolerate drought poorly.<\/p>\n<p>File <a href=\"https:\/\/www.plantenplagen.nl\/en\/files\/rose-varieties\/\" target=\"_blank\" rel=\"noopener noreferrer\">rose varieties<\/a> provides an overview of the many varieties of improved roses.[\/vc_column_text][\/vc_column][\/vc_row][vc_row equal_height=&rdquo;yes&rdquo;][vc_column width=&rdquo;1\/3&Prime;][vc_custom_heading text=&rdquo;Bugs&rdquo; font_container=&rdquo;tag:h4|text_align:center|color:%23ffffff&rdquo; google_fonts=&rdquo;font_family:Lato%3A100%2C100italic%2C300%2C300italic%2Cregular%2Citalic%2C700%2C700italic%2C900%2C900italic|font_style:400%20regular%3A400%3Anormal&rdquo; css=&rdquo;.vc_custom_1532164328547{background-color: #585858 !important;}&rdquo;][vc_column_text el_class=&rdquo;entrytxt&rdquo;]<\/p>\n<figure id=\"attachment_7335\" aria-describedby=\"caption-attachment-7335\" style=\"width: 500px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/www.plantenplagen.nl\/wp-content\/uploads\/Bladluis_roos_.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-7335 size-medium\" src=\"https:\/\/www.plantenplagen.nl\/wp-content\/uploads\/Bladluis_roos_-500x352.jpg\" alt=\"recognize aphids\" width=\"500\" height=\"352\" srcset=\"https:\/\/www.plantenplagen.nl\/wp-content\/uploads\/Bladluis_roos_-500x352.jpg 500w, https:\/\/www.plantenplagen.nl\/wp-content\/uploads\/Bladluis_roos_-768x541.jpg 768w, https:\/\/www.plantenplagen.nl\/wp-content\/uploads\/Bladluis_roos_.jpg 913w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\"><\/a><figcaption id=\"caption-attachment-7335\" class=\"wp-caption-text\"><a href=\"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/aphids\/\" target=\"_blank\" title=\"[vc_row][vc_column][vc_column_text]Aphids are small, plant-eating insects; see: overview aphids, aphid, black bean aphid, black cherry aphid, catalpa aphid, cabbage aphid, currant blister aphid, green peach aphid, green apple aphid, holly aphid, Hydrangea scale, Scale insect, mealybug, lettuce-root aphid, woolly beech aphid, cypress aphid.[\/vc_column_text][\/vc_column][\/vc_row]\" class=\"encyclopedia\">Aphids<\/a> on rose, photo: PlantEnPlagen<\/figcaption><\/figure>\n<p><a href=\"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/aphid_aphidoidea\/\">Aphids<\/a> on the leaves, flower buds and stems. Sometimes accompanied by ants that &ldquo;milk&rdquo; the aphids for <a href=\"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/honeydew\/\" target=\"_blank\" title='[vc_row][vc_column width=\"2\/3\"][vc_column_text el_id=\"topentry\" el_class=\"topentry\"]Honeydew - sugar-rich sticky liquid secreted by aphids. [\/vc_column_text][\/vc_column][vc_column width=\"1\/3\"][\/vc_column][\/vc_row][vc_row gap=\"35\" css=\".vc_custom_1532162142715{background-color: #e6e6e6 !important;}\"][vc_column width=\"1\/2\"][vc_single_image image=\"6657\" img_size=\"medium\" add_caption=\"yes\" style=\"vc_box_rounded\" onclick=\"img_link_large\"][\/vc_column][vc_column width=\"1\/2\" css=\".vc_custom_1532162092980{background-color: #e6e6e6 !important;}\"][vc_column_text el_class=\"entrytxt\"]Honeydew - sugar-rich sticky liquid secreted by aphids. Aphids suck plant sap from leaves; some of these sugars are consumed for energy and the rest is excreted. The&hellip;' class=\"encyclopedia\">honeydew<\/a>.<\/p>\n<figure id=\"attachment_3733\" aria-describedby=\"caption-attachment-3733\" style=\"width: 500px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/plantenplagen.nl\/wp-content\/uploads\/Johanneskever_blad.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-3733 size-medium\" src=\"https:\/\/plantenplagen.nl\/wp-content\/uploads\/Johanneskever_blad-500x472.jpg\" alt=\"\" width=\"500\" height=\"472\" srcset=\"https:\/\/www.plantenplagen.nl\/wp-content\/uploads\/Johanneskever_blad-500x472.jpg 500w, https:\/\/www.plantenplagen.nl\/wp-content\/uploads\/Johanneskever_blad-768x725.jpg 768w, https:\/\/www.plantenplagen.nl\/wp-content\/uploads\/Johanneskever_blad.jpg 954w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\"><\/a><figcaption id=\"caption-attachment-3733\" class=\"wp-caption-text\"><a href=\"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/garden-chafer\/\" target=\"_blank\" title='[vc_row][vc_column width=\"2\/3\"][vc_column_text el_id=\"topentry\" el_class=\"topentry\"]Garden chafer; these 8 to 12 mm beetles are somewhat similar to the common cockchafer and summer chafer, but are smaller. The Garden chafer has reddish-brown, hairy wing cases (elytra). [\/vc_column_text][\/vc_column][vc_column width=\"1\/3\"][vc_column_text el_id=\"entrytxt\" el_class=\"entrytxt\" css=\".vc_custom_1678032784319{padding-left: 20px !important;}\"]Also known as: Garden foliage beetle[\/vc_column_text][\/vc_column][\/vc_row][vc_row gap=\"35\" css=\".vc_custom_1532162142715{background-color: #e6e6e6 !important;}\"][vc_column width=\"1\/2\"][vc_single_image image=\"3705\" img_size=\"medium\" add_caption=\"yes\" style=\"vc_box_rounded\" onclick=\"img_link_large\"][\/vc_column][vc_column&hellip;' class=\"encyclopedia\">Garden chafer<\/a><wbr><\/wbr>, photo: Cymothoa exigua &ndash; CC BY-SA 3.0<\/figcaption><\/figure>\n<p>Flower buds eaten away by the Garden chafer <em>(Phyllopertha horticola)<\/em>.<\/p>\n<p>Round bites were taken from the leaf edges: the <a href=\"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/vine-weevil\/\" target=\"_blank\" title='[vc_row][vc_column width=\"2\/3\"][vc_column_text el_id=\"topentry\" el_class=\"topentry\"]Vine weevil, this nearly 1 cm large dark gray weevil&nbsp;can be found on a wide range of ornamental plants. [\/vc_column_text][\/vc_column][vc_column width=\"1\/3\"][\/vc_column][\/vc_row][vc_row gap=\"35\" css=\".vc_custom_1532162142715{background-color: #e6e6e6 !important;}\"][vc_column width=\"1\/2\"][vc_single_image image=\"3599\" img_size=\"medium\" add_caption=\"yes\" style=\"vc_box_rounded\" onclick=\"img_link_large\"][\/vc_column][vc_column width=\"1\/2\" css=\".vc_custom_1532162092980{background-color: #e6e6e6 !important;}\"][vc_column_text el_class=\"entrytxt\"]Vine weevil (Otiorhynchus sulcatus). This nearly 1 cm large dark gray weevil&nbsp;can be found on a wide&hellip;' class=\"encyclopedia\">Vine weevil<\/a> <em>(Otiorhynchus sulcatus)<\/em> eats rose leaves, among other things, starting at the edges.<\/p>\n<figure id=\"attachment_3781\" aria-describedby=\"caption-attachment-3781\" style=\"width: 500px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/plantenplagen.nl\/wp-content\/uploads\/Anjerbladroller-rups.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-3781\" src=\"https:\/\/plantenplagen.nl\/wp-content\/uploads\/Anjerbladroller-rups-500x337.jpg\" alt=\"\" width=\"500\" height=\"337\" srcset=\"https:\/\/www.plantenplagen.nl\/wp-content\/uploads\/Anjerbladroller-rups-500x337.jpg 500w, https:\/\/www.plantenplagen.nl\/wp-content\/uploads\/Anjerbladroller-rups.jpg 760w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\"><\/a><figcaption id=\"caption-attachment-3781\" class=\"wp-caption-text\">Caterpillar of the <a href=\"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/carnation-tortrix\/\" target=\"_blank\" title='[vc_row][vc_column width=\"2\/3\"][vc_column_text el_id=\"topentry\" el_class=\"topentry\"]Carnation tortrix is a moth and belongs to the family of tortrix moths or leafroller moths. Characteristic for leafroller moths is that they live in a rolled or folded leaf or are spun between the leaves. [\/vc_column_text][\/vc_column][vc_column width=\"1\/3\"][vc_column_text el_id=\"entrytxt\" el_class=\"entrytxt\" css=\".vc_custom_1556808742696{padding-left: 20px !important;}\"]Also known as: Carnation tortrix[\/vc_column_text][\/vc_column][\/vc_row][vc_row gap=\"35\" css=\".vc_custom_1532162142715{background-color: #e6e6e6 !important;}\"][vc_column width=\"1\/2\"][vc_single_image&hellip;' class=\"encyclopedia\">carnation tortrix<\/a>, photo: Dr. Janos Bodor &ndash; CC Public Domain<\/figcaption><\/figure>\n<p>Caterpillars in rolled leaves or spun between the leaves; gnawing damage to buds and leaves: <a href=\"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/tortrix-moth\/\" target=\"_blank\" title='[vc_row][vc_column width=\"2\/3\"][vc_column_text el_id=\"topentry\" el_class=\"topentry\"]Tortrix moths are a family of moths. More than 2,500 species are found in Britain. Characteristic of tortrix moths is that they live inside a rolled or folded leaf or are spun in between leaves. [\/vc_column_text][\/vc_column][vc_column width=\"1\/3\"][vc_column_text el_id=\"entrytxt\" el_class=\"entrytxt\" css=\".vc_custom_1701282333262{padding-left: 20px !important;}\"]Do not confuse with: Leaf-rolling weevils (Attelabidae)[\/vc_column_text][\/vc_column][\/vc_row][vc_row gap=\"35\" css=\".vc_custom_1532162142715{background-color: #e6e6e6 !important;}\"][vc_column&hellip;' class=\"encyclopedia\">Tortrix moth<\/a> <em>(Tortricidae)<\/em>. The carnation tortrix <em>(Cacoecimorpha pronubana)<\/em> and the <a href=\"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/cyclamen-tortrix\/\" target=\"_blank\" title='[vc_row][vc_column width=\"2\/3\"][vc_column_text el_id=\"topentry\" el_class=\"topentry\"]Cyclamen tortrix is a moth and belongs to the leaf rollers. [\/vc_column_text][\/vc_column][vc_column width=\"1\/3\"][vc_column_text el_id=\"entrytxt\" el_class=\"entrytxt\" css=\".vc_custom_1556813018818{padding-left: 20px !important;}\"][\/vc_column_text][\/vc_column][\/vc_row][vc_row gap=\"35\" css=\".vc_custom_1532162142715{background-color: #e6e6e6 !important;}\"][vc_column width=\"1\/2\"][vc_single_image image=\"3775\" img_size=\"medium\" add_caption=\"yes\" style=\"vc_box_rounded\" onclick=\"img_link_large\"][\/vc_column][vc_column width=\"1\/2\" css=\".vc_custom_1532162092980{background-color: #e6e6e6 !important;}\"][vc_column_text el_class=\"entrytxt\"]Cyclamen tortrix (Clepsis spectrana) is a moth and belongs to the leaf rollers (Tortricidae). Characteristic for leafroller moths is that&hellip;' class=\"encyclopedia\">Cyclamen tortrix<\/a><i>(Clepsis spectrana<\/i>) are often found on roses.<\/p>\n<figure id=\"attachment_3767\" aria-describedby=\"caption-attachment-3767\" style=\"width: 368px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/plantenplagen.nl\/wp-content\/uploads\/Koolbladroller_rups_op_boerenkool.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-3767\" src=\"https:\/\/plantenplagen.nl\/wp-content\/uploads\/Koolbladroller_rups_op_boerenkool-368x500.jpg\" alt=\"\" width=\"368\" height=\"500\" srcset=\"https:\/\/www.plantenplagen.nl\/wp-content\/uploads\/Koolbladroller_rups_op_boerenkool-368x500.jpg 368w, https:\/\/www.plantenplagen.nl\/wp-content\/uploads\/Koolbladroller_rups_op_boerenkool.jpg 636w\" sizes=\"auto, (max-width: 368px) 100vw, 368px\"><\/a><figcaption id=\"caption-attachment-3767\" class=\"wp-caption-text\">Caterpillar of Cyclamen tortrix on <a href=\"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/kale\/\" target=\"_blank\" title='[vc_row][vc_column width=\"2\/3\"][vc_column_text el_id=\"topentry\" el_class=\"topentry\"]Kale belongs belongs to the species Brassica oleracea, as do broccoli, cauliflower and red cabbage. Kale is a leafy crop that can be grown on all types of soil. [\/vc_column_text][\/vc_column][vc_column width=\"1\/3\"][\/vc_column][\/vc_row][vc_row content_placement=\"middle\" css=\".vc_custom_1627123481876{padding-top: 0px !important;padding-right: 5px !important;padding-bottom: 0px !important;padding-left: 5px !important;background-color: #ccffff !important;border-radius: 20px !important;}\" el_id=\"mobile\"][vc_column offset=\"vc_hidden-lg vc_hidden-md vc_hidden-sm\"][vc_column_text css=\".vc_custom_1637503365530{padding-top: 0px !important;padding-right:&hellip;' class=\"encyclopedia\">kale<\/a>, photo: Rasbak &ndash; CC BY-SA 3.0<\/figcaption><\/figure>\n<p>[\/vc_column_text][\/vc_column][vc_column width=&rdquo;1\/3&Prime; css=&rdquo;.vc_custom_1532102781238{background-color: #ffffff !important;}&rdquo;][vc_custom_heading text=&rdquo;Fungi &amp; diseases&rdquo; font_container=&rdquo;tag:h4|text_align:center|color:%23ffffff&rdquo; google_fonts=&rdquo;font_family:Lato%3A100%2C100italic%2C300%2C300italic%2Cregular%2Citalic%2C700%2C700italic%2C900%2C900italic|font_style:400%20regular%3A400%3Anormal&rdquo; css=&rdquo;.vc_custom_1537885449118{background-color: #585858 !important;}&rdquo;][vc_column_text el_class=&rdquo;entrytxt&rdquo;]Round, gray to dark brown to <u>+<\/u> 1 cm spots develop on the leaves: <a href=\"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/dark-leaf-spot\/\" target=\"_blank\" title='[vc_row][vc_column width=\"2\/3\"][vc_column_text el_id=\"topentry\" el_class=\"topentry\"]Dark leaf spot is a fungus that mainly infect most Brassica species. [\/vc_column_text][\/vc_column][vc_column width=\"1\/3\"][vc_column_text el_id=\"entrytxt\" el_class=\"entrytxt\" css=\".vc_custom_1541416506448{padding-left: 20px !important;}\"][\/vc_column_text][\/vc_column][\/vc_row][vc_row gap=\"35\" css=\".vc_custom_1532162142715{background-color: #e6e6e6 !important;}\"][vc_column width=\"1\/2\"][vc_single_image image=\"2853\" img_size=\"medium\" add_caption=\"yes\" style=\"vc_box_rounded\" onclick=\"img_link_large\"][\/vc_column][vc_column width=\"1\/2\" css=\".vc_custom_1532162092980{background-color: #e6e6e6 !important;}\"][vc_column_text el_class=\"entrytxt\"]Dark leaf spot (Alternaria brassicae) is a fungus that primarily affects brassicas, but roses can also be infected. Cruciferous&hellip;' class=\"encyclopedia\">Dark leaf spot<\/a> <em>(Alter naria<wbr><\/wbr> brassicae)<\/em>.<\/p>\n<p>Irregular spots appear on leaves, first yellow, then brown, discoloring to purple. Leaf drop early. Young shoots may show purple spots: leaf and stem: <a href=\"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/septoria-blight\/\" target=\"_blank\" title='[vc_row][vc_column width=\"2\/3\"][vc_column_text el_id=\"topentry\" el_class=\"topentry\"]Septoria blight survives on seed. Infection occurs during periods of warm and humid weather (late summer, early fall). [\/vc_column_text][\/vc_column][vc_column width=\"1\/3\"][vc_column_text el_id=\"entrytxt\" el_class=\"entrytxt\" css=\".vc_custom_1701079830023{padding-left: 20px !important;}\"]Also known as: Septoria spot Septoria leaf spot Not to be confused with: Septoria leaf blotch (Zymoseptoria tritici)[\/vc_column_text][\/vc_column][\/vc_row][vc_row gap=\"35\" css=\".vc_custom_1532162142715{background-color: #e6e6e6 !important;}\"][vc_column width=\"1\/2\"][vc_single_image image=\"2525\" img_size=\"medium\" add_caption=\"yes\" style=\"vc_box_rounded\" onclick=\"img_link_large\"][\/vc_column][vc_column&hellip;' class=\"encyclopedia\">Septoria blight<\/a> <em>(Septoria spp).<\/em><\/p>\n<figure id=\"attachment_3691\" aria-describedby=\"caption-attachment-3691\" style=\"width: 500px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/plantenplagen.nl\/wp-content\/uploads\/Sterroetdauw-Zepherine.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-3691 size-medium\" src=\"https:\/\/plantenplagen.nl\/wp-content\/uploads\/Sterroetdauw-Zepherine-500x393.jpg\" alt=\"\" width=\"500\" height=\"393\" srcset=\"https:\/\/www.plantenplagen.nl\/wp-content\/uploads\/Sterroetdauw-Zepherine-500x393.jpg 500w, https:\/\/www.plantenplagen.nl\/wp-content\/uploads\/Sterroetdauw-Zepherine-768x604.jpg 768w, https:\/\/www.plantenplagen.nl\/wp-content\/uploads\/Sterroetdauw-Zepherine-1024x806.jpg 1024w, https:\/\/www.plantenplagen.nl\/wp-content\/uploads\/Sterroetdauw-Zepherine.jpg 1144w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\"><\/a><figcaption id=\"caption-attachment-3691\" class=\"wp-caption-text\">Rose bl<wbr><\/wbr>ack spot on Z&eacute;pherine Drouin, photo: Rasbak &ndash; CC BY-SA 3.0<\/figcaption><\/figure>\n<p>Star-shaped black spots on leaves and stems resulting in premature leaf fall: <a href=\"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/rose-black-spot\/\" target=\"_blank\" title='[vc_row][vc_column width=\"2\/3\"][vc_column_text el_id=\"topentry\" el_class=\"topentry\"]Rose black spot: This fungus causes the characteristic star-shaped spots on roses and laurel. [\/vc_column_text][\/vc_column][vc_column width=\"1\/3\"][\/vc_column][\/vc_row][vc_row gap=\"35\" css=\".vc_custom_1532162142715{background-color: #e6e6e6 !important;}\"][vc_column width=\"1\/2\"][vc_single_image image=\"3691\" img_size=\"medium\" add_caption=\"yes\" style=\"vc_box_rounded\" onclick=\"img_link_large\"][\/vc_column][vc_column width=\"1\/2\" css=\".vc_custom_1532162092980{background-color: #e6e6e6 !important;}\"][vc_column_text el_class=\"entrytxt\"]Rose black spot (Diplocarpon rosae). This fungus causes the characteristic star-shaped spots on roses and laurel. In humid weather, the fungus becomes&hellip;' class=\"encyclopedia\">Rose black spot<\/a> <em>(Diplocarpon rosae)<\/em>.<\/p>\n<p>White powdery spots on the leaves; in severe infestation, sometimes the underside is also covered with fungal spots. Young leaves become misshapen; reduced growth of the rose: <a href=\"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/powdery-mildew\/\" target=\"_blank\" title='[vc_row][vc_column width=\"2\/3\"][vc_column_text el_id=\"topentry\" el_class=\"topentry\"]Powdery mildew, one of the different species of Ascomycete fungi which affects a wide range of plants.[\/vc_column_text][\/vc_column][vc_column width=\"1\/3\"][vc_column_text el_id=\"entrytxt\" el_class=\"entrytxt\" css=\".vc_custom_1671373292008{padding-left: 20px !important;}\"]Do not confuse with: Downy mildew[\/vc_column_text][\/vc_column][\/vc_row][vc_row gap=\"35\" css=\".vc_custom_1532162142715{background-color: #e6e6e6 !important;}\"][vc_column width=\"1\/2\"][vc_single_image image=\"2065\" img_size=\"medium\" add_caption=\"yes\" style=\"vc_box_rounded\" onclick=\"img_link_large\"][\/vc_column][vc_column width=\"1\/2\" css=\".vc_custom_1532162092980{background-color: #e6e6e6 !important;}\"][vc_column_text el_class=\"entrytxt\"]Powdery mildew - one of the different species of the&hellip;' class=\"encyclopedia\">powdery mildew<\/a> <em>(Sphaerotheca pannosa)<\/em>.<\/p>\n<p>Purple to gray-black spots develop on leaves, stem, stem and petal. Leaf yellowing, mildew on the underside, leaves falling off prematurely: <a href=\"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/downy-mildew\/\" target=\"_blank\" title='[vc_row][vc_column width=\"2\/3\"][vc_column_text el_id=\"topentry\" el_class=\"topentry\"]Downy mildew is a water mould, a fungus-like microorganism. [\/vc_column_text][\/vc_column][vc_column width=\"1\/3\"][vc_column_text el_id=\"entrytxt\" el_class=\"entrytxt\" css=\".vc_custom_1679847316365{padding-left: 20px !important;}\"]Do not confuse with: Powdery mildew[\/vc_column_text][\/vc_column][\/vc_row][vc_row gap=\"35\" css=\".vc_custom_1532162142715{background-color: #e6e6e6 !important;}\"][vc_column width=\"1\/2\"][vc_single_image image=\"2553\" img_size=\"medium\" add_caption=\"yes\" style=\"vc_box_rounded\" onclick=\"img_link_large\"][\/vc_column][vc_column width=\"1\/2\" css=\".vc_custom_1532162092980{background-color: #e6e6e6 !important;}\"][vc_column_text el_class=\"entrytxt\"]Downy mildew (Peronosporaceae species) is a water mould (Oomycetes), a fungal microorganism. With downy mildew, the lint&hellip;' class=\"encyclopedia\">downy mildew<\/a> <em>(Pseudoperonospora sparsa)<\/em>.<\/p>\n<p>A few months after planting, roots are affected, leaves yellow, growth lags, rose dies: <a href=\"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/phytophthora\/\" target=\"_blank\" title='[vc_row][vc_column width=\"2\/3\"][vc_column_text el_id=\"topentry\" el_class=\"topentry\"]Phytophthora recognizable by the black spots in on the foliage of potatoes and tomatoes. [\/vc_column_text][\/vc_column][vc_column width=\"1\/3\"][vc_column_text el_id=\"entrytxt\" el_class=\"entrytxt\" css=\".vc_custom_1702811307671{padding-left: 20px !important;}\"]Also known as: Pink rot (potato, carrot) Late Blight (potato, tomato) Phytophthora root rot (rhododendrons, azaleas, rose)[\/vc_column_text][\/vc_column][\/vc_row][vc_row gap=\"35\" css=\".vc_custom_1532162142715{background-color: #e6e6e6 !important;}\"][vc_column width=\"1\/2\"][vc_single_image image=\"1301\" img_size=\"medium\" add_caption=\"yes\" style=\"vc_box_rounded\" onclick=\"img_link_large\"][\/vc_column][vc_column width=\"1\/2\" css=\".vc_custom_1532162092980{background-color: #e6e6e6 !important;}\"][vc_column_text el_class=\"entrytxt\"]Phytophthora&hellip;' class=\"encyclopedia\">Phytophthora<\/a> or Pythium <em>(<a href=\"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/pythium-spp\/\" target=\"_blank\" title='[vc_row][vc_column width=\"2\/3\"][vc_column_text el_id=\"topentry\" el_class=\"topentry\"]Pythium spp, a water mould that mainly affects young, weak plants. [\/vc_column_text][\/vc_column][vc_column width=\"1\/3\"][vc_column_text el_id=\"entrytxt\" el_class=\"entrytxt\" css=\".vc_custom_1696519080642{padding-left: 20px !important;}\"]Also known as: Stem rot (cannabis) Root rot (tulip) Pythium blight (grass)[\/vc_column_text][\/vc_column][\/vc_row][vc_row gap=\"35\" css=\".vc_custom_1532162142715{background-color: #e6e6e6 !important;}\"][vc_column width=\"1\/2\"][vc_single_image image=\"2387\" img_size=\"medium\" add_caption=\"yes\" style=\"vc_box_rounded\" onclick=\"img_link_large\"][\/vc_column][vc_column width=\"1\/2\" css=\".vc_custom_1532162092980{background-color: #e6e6e6 !important;}\"][vc_column_text el_class=\"entrytxt\"]Pythium spp. (Pythium spp.) This water mould (Oomycetes) can&hellip;' class=\"encyclopedia\">Pythium spp.<\/a>)<\/em>.<\/p>\n<figure id=\"attachment_3741\" aria-describedby=\"caption-attachment-3741\" style=\"width: 500px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/plantenplagen.nl\/wp-content\/uploads\/Roest_roos.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-3741 size-medium\" src=\"https:\/\/plantenplagen.nl\/wp-content\/uploads\/Roest_roos-500x333.jpg\" alt=\"\" width=\"500\" height=\"333\" srcset=\"https:\/\/www.plantenplagen.nl\/wp-content\/uploads\/Roest_roos-500x333.jpg 500w, https:\/\/www.plantenplagen.nl\/wp-content\/uploads\/Roest_roos-768x512.jpg 768w, https:\/\/www.plantenplagen.nl\/wp-content\/uploads\/Roest_roos-1024x683.jpg 1024w, https:\/\/www.plantenplagen.nl\/wp-content\/uploads\/Roest_roos.jpg 1200w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\"><\/a><figcaption id=\"caption-attachment-3741\" class=\"wp-caption-text\"><a href=\"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/rose-rust\/\" target=\"_blank\" title='[vc_row][vc_column width=\"2\/3\"][vc_column_text el_id=\"topentry\" el_class=\"topentry\"]Rose rust, this fungus causes the brown-black fungal spots on the leaves of roses in autumn and winter. [\/vc_column_text][\/vc_column][vc_column width=\"1\/3\"][\/vc_column][\/vc_row][vc_row gap=\"35\" css=\".vc_custom_1532162142715{background-color: #e6e6e6 !important;}\"][vc_column width=\"1\/2\"][vc_single_image image=\"3747\" img_size=\"medium\" add_caption=\"yes\" style=\"vc_box_rounded\" onclick=\"img_link_large\"][\/vc_column][vc_column width=\"1\/2\" css=\".vc_custom_1532162092980{background-color: #e6e6e6 !important;}\"][vc_column_text el_class=\"entrytxt\"]Rose rust (Phragmidium mucronatum). This fungus causes the brown-black fungal spots on the leaves of roses in autumn&hellip;' class=\"encyclopedia\">Rose rust<\/a> on the underside of a rose petal, photo: Sanjay Acharya &ndash; CC BY-SA 3.0<\/figcaption><\/figure>\n<p>In summer, patches of orange\/brown fungal spores appear on the underside of the leaves. In winter, the fungal spores turn brownish black: rose rust <em>(Phragmidium mucronatum)<\/em>.<\/p>\n<p>Leaves take on a silvery sheen: <a href=\"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/silver-leaf\/\" target=\"_blank\" title='[vc_row][vc_column width=\"2\/3\"][vc_column_text el_id=\"topentry\" el_class=\"topentry\"]Silver leaf is caused by the purple lichen fungus that gives the leaves of prunus species the characteristic silvery sheen when damaged. [\/vc_column_text][\/vc_column][vc_column width=\"1\/3\"][\/vc_column][\/vc_row][vc_row gap=\"35\" css=\".vc_custom_1532162142715{background-color: #e6e6e6 !important;}\"][vc_column width=\"1\/2\"][vc_single_image image=\"2299\" img_size=\"medium\" add_caption=\"yes\" style=\"vc_box_rounded\" onclick=\"img_link_large\"][\/vc_column][vc_column width=\"1\/2\" css=\".vc_custom_1532162092980{background-color: #e6e6e6 !important;}\"][vc_column_text el_class=\"entrytxt\"]Silver leaf (Chondrostereum purpureum). Purple lichen fungus that gives the leaves of prunus species&hellip;' class=\"encyclopedia\">silver leaf<\/a> <em>(Chondrostereum purpureum).<\/em>[\/vc_column_text][\/vc_column][vc_column width=&rdquo;1\/3&Prime; css=&rdquo;.vc_custom_1532102799994{background-color: #ffffff !important;}&rdquo;][vc_custom_heading text=&rdquo;Other&rdquo; font_container=&rdquo;tag:h4|text_align:center|color:%23ffffff&rdquo; google_fonts=&rdquo;font_family:Lato%3A100%2C100italic%2C300%2C300italic%2Cregular%2Citalic%2C700%2C700italic%2C900%2C900italic|font_style:400%20regular%3A400%3Anormal&rdquo; css=&rdquo;.vc_custom_1532164377225{background-color: #585858 !important;}&rdquo;][vc_column_text el_id=&rdquo;entrytxt&rdquo; el_class=&rdquo;entrytxt&rdquo;]A grafted rose languishes while the rootstock produces shoot after shoot. Usually the grafting goes well, occasionally not. Sometimes <abbr title=\"two varieties of the same species that do not interbreed\">graft incompatibility<\/abbr> occurs if the properties of the rootstock do not match those of the rose to be grafted. Replace the rose.<\/p>\n<p>Tree rose lags in growth, foliage yellowing as early as summer, with drought, drying out quickly. From the rootstock, the bark is (partially) scraped off: cats still like to sharpen their nails on tree roses. Wrap the trunk with netting.[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"author":14,"template":"","categories":[],"tags":[],"encyclopedia-category":[667],"encyclopedia-tag":[],"class_list":["post-14345","encyclopedia","type-encyclopedia","status-publish","hentry","encyclopedia-category-ornamental-garden"],"_links":{"self":[{"href":"https:\/\/www.plantenplagen.nl\/en\/wp-json\/wp\/v2\/encyclopedia\/14345","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.plantenplagen.nl\/en\/wp-json\/wp\/v2\/encyclopedia"}],"about":[{"href":"https:\/\/www.plantenplagen.nl\/en\/wp-json\/wp\/v2\/types\/encyclopedia"}],"author":[{"embeddable":true,"href":"https:\/\/www.plantenplagen.nl\/en\/wp-json\/wp\/v2\/users\/14"}],"wp:attachment":[{"href":"https:\/\/www.plantenplagen.nl\/en\/wp-json\/wp\/v2\/media?parent=14345"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.plantenplagen.nl\/en\/wp-json\/wp\/v2\/categories?post=14345"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.plantenplagen.nl\/en\/wp-json\/wp\/v2\/tags?post=14345"},{"taxonomy":"encyclopedia-category","embeddable":true,"href":"https:\/\/www.plantenplagen.nl\/en\/wp-json\/wp\/v2\/encyclopedia-category?post=14345"},{"taxonomy":"encyclopedia-tag","embeddable":true,"href":"https:\/\/www.plantenplagen.nl\/en\/wp-json\/wp\/v2\/encyclopedia-tag?post=14345"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}