{"id":175,"date":"2020-05-01T15:09:29","date_gmt":"2020-05-01T19:09:29","guid":{"rendered":"https:\/\/site.extension.uga.edu\/doughertyhort\/?p=175"},"modified":"2020-05-01T15:09:30","modified_gmt":"2020-05-01T19:09:30","slug":"powdery-mildew-on-ornamentals","status":"publish","type":"post","link":"https:\/\/site.extension.uga.edu\/doughertyhort\/2020\/05\/powdery-mildew-on-ornamentals\/","title":{"rendered":"Powdery Mildew on Ornamentals"},"content":{"rendered":"\n
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Powdery Mildew on dogwood
Photo by: James Morgan<\/figcaption><\/figure>\n\n\n\n

Lately, we have gotten our fair share of showers.\u00a0 These rains have created all sorts of problems from preventing farmers getting into their fields earlier to mosquitoes buzzing around everywhere.\u00a0 I can safely say that because of the wet and humid weather we have had to deal with, powdery mildew is at the peak of its seasonal occurrence.<\/p>\n\n\n\n

Last week I accidentally locked myself out of my house.\u00a0 Luckily, I gave a spare key to my secretary to keep at the office.\u00a0 As I was waiting for her to come to my rescue I started walking around in the back yard.\u00a0 I discovered that the dogwood tree, next to the house, had powdery mildew on some of the leaves.<\/p>\n\n\n\n

Powdery mildew is a disease that attacks crape myrtles, dogwoods, euonymus, roses, oaks, and various herbaceous plants like verbena, phlox, and gerbera daisy. This disease has been widespread and serious in Georgia.\u00a0 It is present on ornamentals from May to October but peaks in May and June.\u00a0\u00a0 Powdery mildew is fairly easy to recognize.\u00a0 Leaves, flowers and young shoots of ornamental trees are heavily coated with white to grayish powdery patches.\u00a0 The shoots, leaves and even flowers may later be distorted or stunted. \u00a0The fungi that make up powdery mildew penetrate the outermost layer of plant cells.\u00a0 Spores can be blown to surrounding plants, infecting plants of the same species.<\/p>\n\n\n\n

Powdery mildew is not detrimental to established trees and shrubs, but you want to prevent its spread to younger trees or flowering plants.\u00a0 In years past I noticed that powdery mildew shows up on crape myrtles sometime in late May to early June.\u00a0 Some trees just look like they are covered with a light snow if no measures are taken to prevent or control the disease.\u00a0 Suggested control practices include reducing humidity by increasing air circulation. \u00a0The removal of affected stems or leaves from the plant is also suggested.\u00a0 Rake and remove fallen plant litter.\u00a0 \u00a0\u00a0Fungicides such as myclobutanil, thiophanate methyl, tradimefon, and triforine can be applied at the first sign of infection.\u00a0 Do not wait until the entire leaf is covered with mildew.\u00a0 Reapply every two weeks until your plant shows signs of improvement.\u00a0 Please follow the directions on the label for recommended rates.\u00a0 If the problem occurs again in following years, avoid repeated use of a particular fungicide or fungicides with the same mode of action.\u00a0 This will help to minimize fungicide resistance.<\/p>\n","protected":false},"excerpt":{"rendered":"

Lately, we have gotten our fair share of showers.\u00a0 These rains have created all sorts of problems from preventing farmers getting into their fields earlier to mosquitoes buzzing around everywhere.\u00a0 I can safely say that because of the wet and humid weather we have had to deal with, powdery mildew is at the peak of […]<\/p>\n","protected":false},"author":273,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-175","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/site.extension.uga.edu\/doughertyhort\/wp-json\/wp\/v2\/posts\/175","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/site.extension.uga.edu\/doughertyhort\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/site.extension.uga.edu\/doughertyhort\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/site.extension.uga.edu\/doughertyhort\/wp-json\/wp\/v2\/users\/273"}],"replies":[{"embeddable":true,"href":"https:\/\/site.extension.uga.edu\/doughertyhort\/wp-json\/wp\/v2\/comments?post=175"}],"version-history":[{"count":1,"href":"https:\/\/site.extension.uga.edu\/doughertyhort\/wp-json\/wp\/v2\/posts\/175\/revisions"}],"predecessor-version":[{"id":177,"href":"https:\/\/site.extension.uga.edu\/doughertyhort\/wp-json\/wp\/v2\/posts\/175\/revisions\/177"}],"wp:attachment":[{"href":"https:\/\/site.extension.uga.edu\/doughertyhort\/wp-json\/wp\/v2\/media?parent=175"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/site.extension.uga.edu\/doughertyhort\/wp-json\/wp\/v2\/categories?post=175"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/site.extension.uga.edu\/doughertyhort\/wp-json\/wp\/v2\/tags?post=175"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}