{"id":6299,"date":"2017-01-15T18:34:41","date_gmt":"2017-01-15T23:34:41","guid":{"rendered":"http:\/\/www.whatgrowsthere.com\/grow\/?p=6299"},"modified":"2017-01-22T13:38:16","modified_gmt":"2017-01-22T18:38:16","slug":"powdery-mildew-disease-resistant-cultivars","status":"publish","type":"post","link":"https:\/\/whatgrowsthere.com\/grow\/2017\/01\/15\/powdery-mildew-disease-resistant-cultivars\/","title":{"rendered":"Powdery Mildew Disease Resistant Cultivars"},"content":{"rendered":"
\"Powdery<\/a>

Powdery mildew on herbaceous peony<\/p><\/div>\n

\"\"<\/a>

Powdery mildew on Garden Phlox<\/p><\/div>\n

Gardeners have learned to associate certain\u00a0plants with a troublesome disease(s). Powdery and downy mildews have become epidemic in many regions of the U.S. Best ways for managing mildew diseases are\u00a0prevention, good cultural practices, and spraying.<\/strong>. First, avoid planting susceptible cultivars. Plant in the proper\u00a0location and space plants far enough apart so they’re not touching. Surrounding vegetation should not block air movement\u00a0through the garden.<\/p>\n

Follow good cultural practices such as reducing or eliminating overhead irrigation practices. Fertilize to optimize plant health, but avoid over-fertilization with nitrogen as it stimulates young, succulent growth which can be\u00a0more susceptible to infection.<\/p>\n

Some moderately susceptible cultivars may require protection with fungicide sprays, particularly if environmental\u00a0conditions are highly\u00a0favorable for onset of mildew diseases. Dig up and eliminate susceptible cultivars of lilac, roses, crape myrtle, impatiens, zinnias or summer phloxes. Plant breeders continue to provide gardeners with better\u00a0disease resistant cultivars.\u00a0In recent years, notable examples of resistant plants include:<\/p>\n

Crape myrtles – ‘Catawba’, ‘Hopi’, ‘Cherokee’
\nCrabapples \u2013 \u2018Prairifire\u2019, \u2018Sugar Tyme\u2019, lots others
\nDogwood (Cornus florida<\/em>)\u2013 \u2018Cherokee Brave\u2019, \u2018Appalachian Joy\u2019, \u2018Appalachian Snow\u2019, \u2018Appalachian Mist’<\/p>\n

Dogwood hybrids (C. florida<\/em>\u00a0x\u00a0C.<\/em>\u00a0kousa<\/em>) –\u00a0‘Stellar Pink’, ‘Stardust’, ‘Galaxy’, ‘Constellation’ , ‘Aurora’
\nSycamore – \u2018Columbia\u2019, \u2018Liberty\u2019, Yarwood, Exclamation\u2122
\nSummer phlox \u2013 \u2018David\u2019, \u2018Robert Poore\u2019, \u2018Delta Snow\u2019, \u2018Speed Limit 45\u2019
\nLilac \u2013 \u2018Bloomerang\u2019, \u2018Betsy Ross\u2019, \u00a0S. meyeri<\/em>\u00a0<\/em>‘Miss Kim’,\u00a0S. pekinensis<\/em><\/p>\n

Monardas (beebalm) –\u00a0\u2018Marshall\u2019s Delight\u2019, \u2018Blaustrumph\u2019, \u2018Colrain Red\u2019.<\/p>\n

Rhododendrons –\u00a0R. yakushimanum, R. macrophyllum, R.<\/em>\u00a0\u2018Nova Zembla,\u2019\u00a0R.<\/em>\u00a0\u2018Palestrina\u2019
\nRoses –\u00a0Simplicity\u2122 and Meidiland\u2122 roses,\u00a0Rosa rugosa<\/em>\u00a0varieties
\nZinnias –\u00a0Z. angustifolius<\/em>\u00a0<\/em>‘Profusion or Zahara series;\u00a0Pulcino and African varieties<\/p>\n

One final thought<\/span>: if foliage infections break out\u00a0on garden plants in very late summer or fall, spraying a preventative fungicide is generally not necessary or impractical. Instead, practice good garden sanitation<\/strong>,\u00a0a thorough clean-up of infected leaves and stems. For infected annuals and perennials, gather up infected debris and discard. Do not add it to a compost pile, but throw it curbside for pickup or add to a burn pile, obtaining the proper burn permits.<\/p>\n","protected":false},"excerpt":{"rendered":"

Gardeners have learned to associate certain\u00a0plants with a troublesome disease(s). Powdery and downy mildews have become epidemic in many regions of the U.S. Best ways for managing mildew diseases are\u00a0prevention, good cultural practices, and spraying.. First, avoid planting susceptible cultivars. Plant in the proper\u00a0location and space plants far enough apart so they’re not touching. Surrounding […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[656,914,674,844,1030,1136,598,630,1114,113,1100],"tags":[],"_links":{"self":[{"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/posts\/6299"}],"collection":[{"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/comments?post=6299"}],"version-history":[{"count":8,"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/posts\/6299\/revisions"}],"predecessor-version":[{"id":9419,"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/posts\/6299\/revisions\/9419"}],"wp:attachment":[{"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/media?parent=6299"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/categories?post=6299"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/tags?post=6299"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}