{"id":12259,"date":"2021-07-10T12:38:41","date_gmt":"2021-07-10T10:38:41","guid":{"rendered":"https:\/\/www.plantenplagen.nl\/plantenplagen\/dahlia\/"},"modified":"2023-05-29T18:14:02","modified_gmt":"2023-05-29T16:14:02","slug":"dahlia","status":"publish","type":"encyclopedia","link":"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/dahlia\/","title":{"rendered":"Dahlia"},"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;]Dahlias belong to the composite family <em>(Asteraceae)<\/em> and have many species.<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_1649255717525{padding-top: 0px !important;padding-right: 0px !important;padding-bottom: 0px !important;padding-left: 0px !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 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;6971&Prime; img_size=&rdquo;medium&rdquo; add_caption=&rdquo;yes&rdquo; style=&rdquo;vc_box_rounded&rdquo; onclick=&rdquo;img_link_large&rdquo;][vc_single_image image=&rdquo;6967&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_1625912346198{padding-left: 10px !important;}&rdquo;]<\/p>\n<ul>\n<li>Dahlias are edible, both leaf and tuber. The taste is somewhat anise-like.<\/li>\n<\/ul>\n<p>[\/vc_column_text][\/vc_column][vc_column width=&rdquo;1\/2&Prime; css=&rdquo;.vc_custom_1649255695247{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>Dahlias<\/strong> belong to the composite family <em>(Asteraceae)<\/em> and have many species. The origin of today&rsquo;s dahlia is in Mexico where the original dahlia, a tall perennial, was cultivated for its edible fleshy roots. Today&rsquo;s dahlias are <a title=\"Glossary\" href=\"https:\/\/www.plantenplagen.nl\/en\/files\/glossary\/\" target=\"_blank\" rel=\"noopener\">hybrids<\/a>. There are many varieties: from single flowers to orchid-like. Flowering time is from July to November or until the first night frost.<br>\nThe dahlia is a frost-prone tuberous plant that should be dug up and stored in late fall. Preferably in a cool (<u>+<\/u>5&deg;C), frost-free dry room. Not all dahlias are equally sensitive to frost.<br>\nDo not remove the tubers from the ground immediately in autumn: the dahlia still draws nutrition from the above-ground green parts. Once the leaves start to wither, the tubers can be taken out of the ground.<br>\nThe overwintered tubers can be planted again after mid-May when the risk of night frost has decreased.&nbsp;When planting, make sure the dried out main stem is at the top. Planting depth is only ten centimeters. Dahlias like a nutritious, not too wet soil in a somewhat sheltered spot.<br>\nMultiply dahlias by tearing the tubers and planting them. Dahlias like to be in the sun and water regularly.[\/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_6965\" aria-describedby=\"caption-attachment-6965\" style=\"width: 340px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/plantenplagen.nl\/wp-content\/uploads\/Dahlia_luizen.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-6965\" src=\"https:\/\/plantenplagen.nl\/wp-content\/uploads\/Dahlia_luizen-340x500.jpg\" alt=\"recognize aphids on dahlia\" width=\"340\" height=\"500\" srcset=\"https:\/\/www.plantenplagen.nl\/wp-content\/uploads\/Dahlia_luizen-340x500.jpg 340w, https:\/\/www.plantenplagen.nl\/wp-content\/uploads\/Dahlia_luizen-696x1024.jpg 696w, https:\/\/www.plantenplagen.nl\/wp-content\/uploads\/Dahlia_luizen.jpg 720w\" sizes=\"auto, (max-width: 340px) 100vw, 340px\"><\/a><figcaption id=\"caption-attachment-6965\" 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 leaves and stem, photo: Anouschka Van Etten<\/figcaption><\/figure>\n<p>Aphids on leaves and stem.<\/p>\n<p>Holes appear in the leaves, sometimes they are completely eaten away: <a href=\"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/snails-and-slugs\/\" target=\"_blank\" title='[vc_row][vc_column width=\"2\/3\"][vc_column_text el_id=\"topentry\" el_class=\"topentry\"]Slugs are especially active at night; they like a moist environment. They live on fungi and dead material, as well as fruits and vegetables. [\/vc_column_text][\/vc_column][vc_column width=\"1\/3\"][vc_column_text el_id=\"entrytxt\" el_class=\"entrytxt\" css=\".vc_custom_1539424280540{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=\"2329\" img_size=\"medium\" add_caption=\"yes\" style=\"vc_box_rounded\" onclick=\"img_link_large\"][\/vc_column][vc_column width=\"1\/2\" css=\".vc_custom_1629021009877{background-color: #e6e6e6 !important;}\"][vc_column_text el_class=\"entrytxt\"]Slugs and snails are especially active at&hellip;' class=\"encyclopedia\">snails and slugs<\/a>.<\/p>\n<p>Flowers, leaves and buds are eaten: the <a href=\"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/earwig\/\" target=\"_blank\" title='[vc_row][vc_column width=\"2\/3\"][vc_column_text el_id=\"topentry\" el_class=\"topentry\"]Earwig, crawling insect susceptible to desiccation. Earwigs are omnivores: plants, animals and dead (plant) material. [\/vc_column_text][\/vc_column][vc_column width=\"1\/3\"][vc_column_text el_id=\"entrytxt\" el_class=\"entrytxt\" css=\".vc_custom_1539434246161{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=\"2343\" 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\"]Earwig - omnivorous insect; the common earwig (Forficula auricularia) is native to Europe. Earwigs (Forficulidae) belong&hellip;' class=\"encyclopedia\">earwig<\/a>. Sometimes they hide in the flowers.[\/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;]Brown spots appear on the leaves, the spots spread and grey fluffy mold. Buds and leaves dry out: <a href=\"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/gray-mold\/\" target=\"_blank\" title='[vc_row][vc_column width=\"2\/3\"][vc_column_text el_id=\"topentry\" el_class=\"topentry\"]Gray mold is a common fungus that affects plants when humidity is high. [\/vc_column_text][\/vc_column][vc_column width=\"1\/3\"][vc_column_text el_id=\"entrytxt\" el_class=\"entrytxt\" css=\".vc_custom_1710582027475{padding-left: 20px !important;}\"]Also known as: Grey mould Botrytis rot But rot (cannabis) Chocolate spot disease (broad bean) Botrytis blight (asparagus) Botrytis Leaf Blight (onion) Grey rot (endive, kohlrabi, purslane, lettuce) Leaf blight, dry crown rot&hellip;' class=\"encyclopedia\">Gray mold<\/a> <em>(Botrytis)<\/em>.<\/p>\n<figure id=\"attachment_6985\" aria-describedby=\"caption-attachment-6985\" style=\"width: 500px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/plantenplagen.nl\/wp-content\/uploads\/Dahlia_bladvlek.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-6985\" src=\"https:\/\/plantenplagen.nl\/wp-content\/uploads\/Dahlia_bladvlek-500x375.jpg\" alt=\"recognize fungus on dahlia\" width=\"500\" height=\"375\" srcset=\"https:\/\/www.plantenplagen.nl\/wp-content\/uploads\/Dahlia_bladvlek-500x375.jpg 500w, https:\/\/www.plantenplagen.nl\/wp-content\/uploads\/Dahlia_bladvlek-768x576.jpg 768w, https:\/\/www.plantenplagen.nl\/wp-content\/uploads\/Dahlia_bladvlek.jpg 960w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\"><\/a><figcaption id=\"caption-attachment-6985\" class=\"wp-caption-text\">Yellow-green spots on the leaves, photo: Julia Kruse &ndash; CC BY-SA 3.0<\/figcaption><\/figure>\n<p>Yellow-green spots appear on the leaves, multiply and turn gray: <em><a href=\"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/entyloma\/\" target=\"_blank\" title='[vc_row][vc_column width=\"2\/3\"][vc_column_text el_id=\"topentry\" el_class=\"topentry\"]Entyloma belongs to the smut fungi. [\/vc_column_text][\/vc_column][vc_column width=\"1\/3\"][vc_column_text el_id=\"entrytxt\" el_class=\"entrytxt\" css=\".vc_custom_1671962486603{padding-left: 20px !important;}\"]Also known as: Dahlia smut (dahlia)[\/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=\"6989\" 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\"]Entyloma belongs to the smut fungi. Smut spot on dahlias is caused by Entyloma dahliae, one of 180 species of&hellip;' class=\"encyclopedia\">Entyloma<\/a><\/em>.<\/p>\n<p>Plant wilts and leaves yellow. White (sometimes pink or brown) mold develops on stem and tendrils: <a href=\"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/ffusarium-wilt\/\" target=\"_blank\" title='[vc_row][vc_column width=\"2\/3\"][vc_column_text el_id=\"topentry\" el_class=\"topentry\"]Fusarium wilt is a soil-borne fungal disease that occurs worldwide and causes a lot of damage to i.e. crops. [\/vc_column_text][\/vc_column][vc_column width=\"1\/3\"][vc_column_text el_id=\"entrytxt\" el_class=\"entrytxt\" css=\".vc_custom_1670690528743{padding-left: 20px !important;}\"]Also known as: Basal rot Bulb rot (tulip)[\/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=\"3105\" 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\"]Fusarium wilt (Fusarium oxysporum) is&hellip;' class=\"encyclopedia\">Fusarium wilt<\/a> <em>(Fusarium oxysporum) <\/em>or <a href=\"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/verticillium-wilt\/\" target=\"_blank\" title='[vc_row][vc_column width=\"2\/3\"][vc_column_text el_id=\"topentry\" el_class=\"topentry\"]Verticillium wilt belongs to the soil fungi that causes wilt in greenhouses and on wet soils. [\/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=\"2563\" 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\"]Verticillium species are soil fungi that causes wilting,&nbsp;especially in hot greenhouses and on wet soils. However, various garden plants can&hellip;' class=\"encyclopedia\">Verticillium wilt<\/a> <em>Verticillium spp)<\/em>.<\/p>\n<p>Plants wilt, leaves die and brown or black spots appear on roots: Black scurf and stem canker <em>(<a href=\"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/rhizoctonia\/\" target=\"_blank\" title='[vc_row][vc_column width=\"2\/3\"][vc_column_text el_id=\"topentry\" el_class=\"topentry\"]Rhizoctonia is a soil fungus that causes a wide range of plant diseases. [\/vc_column_text][\/vc_column][vc_column width=\"1\/3\"][vc_column_text el_id=\"entrytxt\" el_class=\"entrytxt\" css=\".vc_custom_1703004700554{padding-left: 20px !important;}\"]Also known as: Brown rot (dahlia) Black scurf (potatoes) Root rot (beets) Belly rot (cucumber) Tulip bulb rot[\/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=\"2465\" 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\"]Rhizoctonia&hellip;' class=\"encyclopedia\">Rhizoctonia<\/a>)<\/em>.<\/p>\n<p>Light green to yellowish streaks appear on the leaves: <a href=\"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/mosaic-virus\/\" target=\"_blank\" title='[vc_row][vc_column width=\"2\/3\"][vc_column_text el_id=\"topentry\" el_class=\"topentry\"]Mosaic virus is an umbrella term for many harmful plant viruses that all cause a characteristic mosaic pattern on plants. [\/vc_column_text][\/vc_column][vc_column width=\"1\/3\"][vc_column_text el_id=\"entrytxt\" el_class=\"entrytxt\" css=\".vc_custom_1679658041550{padding-left: 20px !important;}\"]Known mosaic viruses: Zucchini Yellow Mosaic Virus (ZYMV). Cucumber mosaic virus (CMV) Cucumber green mottle mosaic virus (CGMMV) Tomato Brown Rugose Fruit Virus (ToBRFV) Tobacco mosaic&hellip;' class=\"encyclopedia\">Mosaic virus<\/a>.[\/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;]Dahlia suddenly falls over and leaves wither: the stems have been gnawed off just above the ground: <a href=\"https:\/\/www.plantenplagen.nl\/en\/plantenplagen\/mice\/\" target=\"_blank\" title='[vc_row][vc_column width=\"2\/3\"][vc_column_text el_id=\"topentry\" el_class=\"topentry\"]Mice, rodents that sometimes dig up seeds. [\/vc_column_text][\/vc_column][vc_column width=\"1\/3\"][vc_column_text el_id=\"entrytxt\" el_class=\"entrytxt\" css=\".vc_custom_1539422215298{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=\"2321\" img_size=\"medium\" add_caption=\"yes\" style=\"vc_box_rounded\" onclick=\"img_link_large\"][vc_single_image image=\"2323\" 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\"]Mouse Usually common vole (Microtus arvalis) gnaw on bulbs, roots and tree bark. Shrews (Soricidae) are useful insect hunters.&hellip;' class=\"encyclopedia\">mice<\/a>.[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"author":14,"template":"","categories":[],"tags":[],"encyclopedia-category":[],"encyclopedia-tag":[],"class_list":["post-12259","encyclopedia","type-encyclopedia","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.plantenplagen.nl\/en\/wp-json\/wp\/v2\/encyclopedia\/12259","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=12259"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.plantenplagen.nl\/en\/wp-json\/wp\/v2\/categories?post=12259"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.plantenplagen.nl\/en\/wp-json\/wp\/v2\/tags?post=12259"},{"taxonomy":"encyclopedia-category","embeddable":true,"href":"https:\/\/www.plantenplagen.nl\/en\/wp-json\/wp\/v2\/encyclopedia-category?post=12259"},{"taxonomy":"encyclopedia-tag","embeddable":true,"href":"https:\/\/www.plantenplagen.nl\/en\/wp-json\/wp\/v2\/encyclopedia-tag?post=12259"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}