{"id":1682,"date":"2016-04-08T08:57:08","date_gmt":"2016-04-08T12:57:08","guid":{"rendered":"http:\/\/site.extension.uga.edu\/applingcrop\/?p=1682"},"modified":"2016-04-08T08:57:08","modified_gmt":"2016-04-08T12:57:08","slug":"update-on-peanut-disease-2016","status":"publish","type":"post","link":"https:\/\/site.extension.uga.edu\/applingcrop\/2016\/04\/update-on-peanut-disease-2016\/","title":{"rendered":"Update on Peanut Disease 2016"},"content":{"rendered":"

Update on Peanut Disease 2016<\/strong><\/p>\n

Though still approximately 6 weeks away from the general start of the planting season, there are \u00a0issues regarding management of peanut diseases and nematodes affecting peanut that deserve attention now.<\/p>\n

    \n
  1. Choosing the right variety.<\/strong>\u00a0 Most of our acreage will be planted in \u2018Georgia-06G\u2019 and this continues to be an excellent variety.\u00a0 Seed for \u2018Georgia-12Y\u2019 is generally unavailable; however I encourage growers who are concerned about white mold to plant some if they can.\u00a0\u00a0If you have\u00a0root-knot nematode problems consider planting at least some acreage in \u2018Tifguard\u2019 or \u2018Georgia-14N\u2019, remembering that Georgia-14N is a later-maturing variety.\u00a0 Use the 2016 version of \u2018Peanut Rx\u2019 to determine the predicted risk to tomato spotted wilt, white mold and leaf spot diseases given the variety planted and production practices. \u00a0\u00a0With this information\u00a0you can make a better informed decision on\u00a0the disease management program.<\/li>\n
  2. Decisions regarding nematode control are critical now.<\/strong>\u00a0 Growers who anticipate a problem with peanut root-knot nematodes and who plan to applpy a nematicide will likely use Telone II or Velum Total.\u00a0Most of our acreage in Appling County is a\u00a0cotton\/peanut rotation, so\u00a0peanut rootknot nematode is not a huge problem. However, it is likely that some have dealt with this pest.\u00a0\u00a0The primary consideration in choosing between a resistant variety, Telone II and Velum Total is the size of the population of nematodes in a field. The economic threshold number is 10 per 100cc soil.\u00a0 Velum Total (18 fl oz\/A) is generally recommended where a grower would have used Temik 15G, 10 lb\/A at-plant, which would coincide with \u201clow-to-moderate\u201d nematode populations.\u00a0 Defining \u201clow-to-moderate\u201d populations is unsettling, but I would say anywhere from 10 to 100 root-knot nematodes per 100cc soil in a FALL-collected sample. As numbers increase beyond 100 per 100cc soil, a resistant variety or Telone II becomes increasingly important.\u00a0 Also, given that the root-knot nematodes are generally \u201cclumped\u201d in a field, it is likely that even a field described as \u201clow-to-moderate\u201d will have significant \u201chot spots\u201d in it. Telone II should be applied in-row at 4.5 gal\/A in-row 10-14 days ahead of planting with special awareness of soil conditions during this El Ni\u00f1o season.\u00a0 The possibility of frequent rain events could make fumigation challenging.\u00a0\u00a0 An insecticide for management of thrips is still required when Telone is used but not when Velum Total is applied.\u00a0 Velum Total should be applied at 18 fl oz\/A for peanuts and the product can be mixed with other fungicides and inoculants without concern.\u00a0 Whether choosing Telone II or Velum Total, accurate calibration and precise application are critical for maximum success.\u00a0 Growers should ensure that equipment is properly put together and tested for calibration.<\/li>\n
  3. By now, most growers are aware that Tilt-Bravo will be generally unavailable this season<\/strong> and the issues concerning sale of peanuts treated with propiconazole (the active ingredient in Tilt) to the European market could affect other products as well.\u00a0 For example, it is not clear how Artisan, a combination of flutolanil and propiconazole will be sold this season; however, Convoy\u00a0 (flutolanil alone) will be readily available.\u00a0 Syngenta will likely recommend a tank-mix of Bravo and Alto to replace Tilt-Bravo; products like Priaxor will also perform well in this early-season spot.\u00a0 As we move beyond planting, additional discussion regarding leaf spot management will be proposed.<\/li>\n
  4. White mold is of special concern this year<\/strong>, both because of anticipated short-rotations and because of the severe outbreak we had last year.\u00a0 Growers are reminded that early-season applications of Proline and, perhaps, Elatus can help to manage this important disease.\u00a0 Banded applications are typically made approximately 3-5 weeks after planting.\u00a0 NO FUNGICIDE PROGRAM CAN MAKE UP FOR SHORT ROTATIONS.\u00a0 However, using the right products at the right time sure can help.<\/li>\n<\/ol>\n

    What about AgLogic 15G?<\/strong><\/p>\n

    By know you have likely heard something about AgLogic and it being a replacement for Temik. Here is what we know about AgLogic:<\/p>\n

    AgLogic is labeled for use in soybeans,\u00a0cotton, peanuts, sugar beets, drybeans and sweet potatoes.<\/p>\n

    I do not know the price.<\/p>\n

    We (UGA) have\u00a0not tested it.\u00a0\u00a0However, we\u00a0do expect it to perform very similar to Temik 15G, but, again, have not tested it.<\/p>\n

    It will be in short-supply this year.<\/p>\n

    Growers who are able to get a hold of some will be required to take a 20-question test with the dealer who will sell them the product.<\/p>\n

    Update On El Nino Weather<\/strong><\/p>\n

    The climate of Georgia this winter has been strongly influenced by El Nino, which is related to cooler and wetter conditions than usual in the Southeast in the winter and spring when an El Nino is occurring.\u00a0 While December did not follow the pattern this year, with much above temperatures, the rest of winter has settled into a more typical El Nino regime.\u00a0 This is expected to continue through spring, which may mean wet conditions in the fields for the next few months.\u00a0 This may lead to delays in planting which could hurt yield, according to the peanut planting date tool at\u00a0www.agroclimate.org<\/a>.<\/p>\n

    El Nino is already starting to diminish and is expected to return to neutral conditions by May or June before swinging to the opposite phase, La Nina, later this summer.\u00a0 La Nina is associated with dry and warm conditions, which could hurt crop development later in the growing season, but could help with harvest.\u00a0 The only exception is in areas that are hit by tropical storms, which are often more numerous in La Nina years.\u00a0 If a La Nina does develop, next winter is likely to be warmer and drier than usual, leading to the possibility of drought returning to the Southeast in 2017.<\/p>\n

    Contributors:<\/p>\n

    Dr. Bob Kemerait, UGA Plant Pathologist<\/p>\n

    Pam Knox, Agriculture State Climatologist<\/p>\n

     <\/p>\n","protected":false},"excerpt":{"rendered":"

    Update on Peanut Disease 2016 Though still approximately 6 weeks away from the general start of the planting season, there are \u00a0issues regarding management of peanut diseases and nematodes affecting peanut that deserve attention now. Choosing the right variety.\u00a0 Most of our acreage will be planted in \u2018Georgia-06G\u2019 and this continues to be an excellent […]<\/p>\n","protected":false},"author":217,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-1682","post","type-post","status-publish","format-standard","hentry","category-peanuts"],"_links":{"self":[{"href":"https:\/\/site.extension.uga.edu\/applingcrop\/wp-json\/wp\/v2\/posts\/1682","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/site.extension.uga.edu\/applingcrop\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/site.extension.uga.edu\/applingcrop\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/site.extension.uga.edu\/applingcrop\/wp-json\/wp\/v2\/users\/217"}],"replies":[{"embeddable":true,"href":"https:\/\/site.extension.uga.edu\/applingcrop\/wp-json\/wp\/v2\/comments?post=1682"}],"version-history":[{"count":1,"href":"https:\/\/site.extension.uga.edu\/applingcrop\/wp-json\/wp\/v2\/posts\/1682\/revisions"}],"predecessor-version":[{"id":1683,"href":"https:\/\/site.extension.uga.edu\/applingcrop\/wp-json\/wp\/v2\/posts\/1682\/revisions\/1683"}],"wp:attachment":[{"href":"https:\/\/site.extension.uga.edu\/applingcrop\/wp-json\/wp\/v2\/media?parent=1682"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/site.extension.uga.edu\/applingcrop\/wp-json\/wp\/v2\/categories?post=1682"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/site.extension.uga.edu\/applingcrop\/wp-json\/wp\/v2\/tags?post=1682"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}