![\"\"](\"https:\/\/site.extension.uga.edu\/tattnall\/files\/2018\/03\/onion-downy2.jpeg\")
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Treatment Options<\/h1>\n
(Provided by Cliff Riner, UGA Area Onion Agent)\u00a0 As far as products that can be used,\u00a0 know that there are numerous products with a label stating control of downy mildew.\u00a0 However, I want to provide some options and how I rank them in terms of potential.\u00a0 I use these as a TIER system of better products to somewhat beneficial.\u00a0 Below are the products and a brief justification.\u00a0 Hopefully this information can be utilized to help you make a decision, if the time comes that you want to spray for prevention of downy mildew.<\/p>\n
<\/p>\n
Tier 1 (Most Reliable, based on Data)<\/p>\n
Reason `\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Reason was the most effective at slowing Downy Mildew in a local trial that was conducted the year that the disease was so strong.<\/p>\n
Zampro\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Zampro was statistically as effective as Reason in that same trial.<\/p>\n
**Orondis\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Orondis is a new product from Syngenta.\u00a0 **Other trials have suggested that this product has very good efficacy on Downy and some residual activity, however we have no local UGA data to clarify this either way.<\/p>\n
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<\/p>\n
Tier 2 (Moderate)<\/p>\n
Omega 500\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Omega has shown benefit in the UGA trials, however it was slightly less effective than the two above.\u00a0 However, Omega is also very effective at preventing other fungal pathogens.<\/p>\n
Ridomil Bravo\u00a0\u00a0 Ridomil Bravo has multiple states with documentation of some control of downy.\u00a0 It has never been excellent, but it also is a cheaper option than most above.<\/p>\n
<\/p>\n
Tier 3 (Some benefit)<\/p>\n
Phosphoric Acid\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Phosphoric acids such as Phostrol, ProPhyt, and others have shown to be slightly effective at preventing downy in some studies. They are a cheaper option, and have some benefit to the overall fungicide program.<\/p>\n
Maneb\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Dithane, Pencozeb, etc\u2026 the maneb products are listed as somewhat effective.\u00a0 I wouldn\u2019t count on much help if we get to the point of seeing downy, but they may be offering some prevention.<\/p>\n","protected":false},"excerpt":{"rendered":"
Downy Mildew Found in Our Area Downy Mildew of Vidalia Onion (Peronospora destructor)\u00a0was confirmed in the Vidalia Onion growing region on March 19, 2018.\u00a0 This can be a highly destructive disease, causing serious losses in yield and bulb quality.\u00a0 Growers need to be aware of its presence in the area so they can make decisions […]<\/p>\n","protected":false},"author":97,"featured_media":831,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[73],"tags":[77,78,79,76,38,36,74],"class_list":["post-828","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-vidalia-onion","tag-downy","tag-downy-mildew","tag-georgia","tag-onion","tag-tattnall","tag-uga","tag-vidalia-onion"],"_links":{"self":[{"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/posts\/828","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/users\/97"}],"replies":[{"embeddable":true,"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/comments?post=828"}],"version-history":[{"count":2,"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/posts\/828\/revisions"}],"predecessor-version":[{"id":833,"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/posts\/828\/revisions\/833"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/media\/831"}],"wp:attachment":[{"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/media?parent=828"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/categories?post=828"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/tags?post=828"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}