{"id":347,"date":"2019-05-29T10:38:23","date_gmt":"2019-05-29T14:38:23","guid":{"rendered":"http:\/\/site.extension.uga.edu\/benhillcoag\/?p=347"},"modified":"2019-05-29T10:38:23","modified_gmt":"2019-05-29T14:38:23","slug":"peanut-weed-update-may-23rd","status":"publish","type":"post","link":"https:\/\/site.extension.uga.edu\/benhillcoag\/2019\/05\/peanut-weed-update-may-23rd\/","title":{"rendered":"Peanut Weed Update May 23rd"},"content":{"rendered":"

Peanut Weed Control Update for May 23 (Prostko)<\/a><\/h3>\n
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A few things to think about in regards to peanut weed control given the current weather conditions:<\/p>\n

1)\u00a0 Rainfall events on Mother’s Day Weekend (May 9-13) caused some Valor related peanut problems in many areas of south Georgia (Figure 1).\u00a0 Since I have addressed this issue numerous times in other blogs, I feel no need to bloviate any further.\u00a0 But, this problem should not be a surprise to anyone who has ever used Valor in the past.\u00a0 Valor injury will almost always happen when rainfall events occur from cracking up until about 2-3 weeks later.\u00a0 Historically, this injury has been cosmetic only and not resulted in reduced peanut yields.<\/p>\n\n\n\n\n
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Figure 1.\u00a0 Valor injury at UGA Ponder Farm, May 14, 2019.<\/b><\/p>\n
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2) Cracking\/EPOST applications of paraquat mixtures or solo applied Storm or Ultra Blazer should be delayed as late as possible in peanut fields suffering from Valor injury.\u00a0 I would argue that if Valor injury has occurred, then good weed control has also occurred and a cracking treatment might not really be needed.\u00a0 Paraquat treatments can safely be applied in peanuts up to 28 days after cracking.<\/p>\n

3) Common paraquat mixtures include paraquat + Storm or Basagran + Dual Magnum or Warrant or Zidua.\u00a0 \u00a0I have\u00a0no preference<\/b>\u00a0between Dual Magnum, Warrant or Zidua.\u00a0 \u00a0There is no need for additional adjuvants with Dual Magnum mixes but a NIS (0.25% v\/v) should be used in Warrant or Zidua + paraquat tank-mixes.\u00a0 FYI, I am not a huge fan of paraquat + Dual Magnum or Warrant or Zidua without any Basagran\/Storm due to greater injury potential that might reduce yields (especially under these lava-like weather conditions<\/i>). Also, paraquat without Basagran\/Storm is not very effective on smallflower mg (Figure 2).<\/p>\n\n\n\n\n
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Figure 2.\u00a0 Smallflower morninglory<\/b><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
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3) With paraquat mixes, I prefer Storm (bentazon + acifluorfen) over Basagran (bentazon) due to the variety of weeds that can occur in any given peanut field in Georgia.\u00a0 My typical recommended use rate of Storm in EPOST paraquat tank-mixes is 16 oz\/A.\u00a0 If need be, growers can make their own “Georgia” Storm by mixing 16 oz\/A of Ultra Blazer 2SL + 8 oz\/A of Basagran 4SL (yes<\/i>,\u00a0this is a slightly hotter mix than 16 oz\/A of Storm<\/i>).<\/p>\n

4) It is very hot and very dry right now.\u00a0\u00a0Non-irrigated<\/b>\u00a0growers who were planning on using paraquat tank-mixes after peanut emergence might want to re-considering their options.\u00a0 Why?\u00a0 Rainfall\/irrigation is critical in helping peanut plants recover from paraquat injury.\u00a0 I do not think that\u00a0irrigated<\/b>\u00a0growers need to worry about this issue since they can help the peanut plants recover from paraquat injury with well-timed irrigation events.<\/p>\n

5) When paraquat + Storm\/Basagran + Dual\/Warrant\/Zidua mixtures are applied in peanut, there is no need to be a great ID’er of weeds since these mixes control just about everything (small grasses and small broadleaf weeds).\u00a0 But, if a\u00a0non-irrigated<\/b>\u00a0grower decides to go with something other than paraquat mixtures (which is fine<\/i>), such as Ultra Blazer or Strongarm or Cadre or 2,4-DB, they better know what is in the field since these herbicides are not as broad spectrum.\u00a0 I am not comfortable with very early applications of Cobra unless the peanut plants have reached the 6 true leaf stage.<\/p>\n

6) No matter what I say or do, if it don’t rain, it don’t matter! (That’s a famous quote from former UGA Extension Peanut Specialist, Dr. John Baldwin<\/i>)<\/div>\n","protected":false},"excerpt":{"rendered":"

Peanut Weed Control Update for May 23 (Prostko) A few things to think about in regards to peanut weed control given the current weather conditions: 1)\u00a0 Rainfall events on Mother’s Day Weekend (May 9-13) caused some Valor related peanut problems in many areas of south Georgia (Figure 1).\u00a0 Since I have addressed this issue numerous […]<\/p>\n","protected":false},"author":234,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,15,19],"tags":[],"class_list":["post-347","post","type-post","status-publish","format-standard","hentry","category-herbicides","category-peanuts","category-weeds"],"_links":{"self":[{"href":"https:\/\/site.extension.uga.edu\/benhillcoag\/wp-json\/wp\/v2\/posts\/347","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/site.extension.uga.edu\/benhillcoag\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/site.extension.uga.edu\/benhillcoag\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/site.extension.uga.edu\/benhillcoag\/wp-json\/wp\/v2\/users\/234"}],"replies":[{"embeddable":true,"href":"https:\/\/site.extension.uga.edu\/benhillcoag\/wp-json\/wp\/v2\/comments?post=347"}],"version-history":[{"count":1,"href":"https:\/\/site.extension.uga.edu\/benhillcoag\/wp-json\/wp\/v2\/posts\/347\/revisions"}],"predecessor-version":[{"id":348,"href":"https:\/\/site.extension.uga.edu\/benhillcoag\/wp-json\/wp\/v2\/posts\/347\/revisions\/348"}],"wp:attachment":[{"href":"https:\/\/site.extension.uga.edu\/benhillcoag\/wp-json\/wp\/v2\/media?parent=347"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/site.extension.uga.edu\/benhillcoag\/wp-json\/wp\/v2\/categories?post=347"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/site.extension.uga.edu\/benhillcoag\/wp-json\/wp\/v2\/tags?post=347"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}