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231225s2020 xx |||||o 00| ||eng c |
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|a 10.1094/PDIS-03-20-0547-RE
|2 doi
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|a eng
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|a Anco, Daniel J
|e verfasserin
|4 aut
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| 245 |
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|a Sixty-One Years Following Registration, Phorate Applied In-Furrow at Planting Suppresses Development of Late Leaf Spot on Peanut
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|c 2020
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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| 338 |
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 22.02.2024
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|a published: Print-Electronic
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|a Citation Status Publisher
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|a Late and early leaf spot are caused by Nothopassalora personata and Passalora arachidicola, respectively, and are damaging diseases of peanut (Arachis hypogaea L.) capable of defoliation and yield loss. Management of these diseases is most effective through the integration of tactics that reduce starting inoculum and prevent infection. The insecticide phorate was first registered in 1959 and has been used in peanut production for decades in-furrow at planting to suppress thrips. Phorate further provides significant suppression of Tomato spotted wilt virus infection beyond suppression of its thrips vector alone by activating defense-related responses in the peanut plant. From six experiments conducted from 2017 to 2019 in Blackville, SC, Reddick, FL, and Quincy, FL, significantly less leaf spot defoliation was exhibited on peanuts treated with phorate in-furrow at planting (26%) compared with nontreated checks (48%). In-season fungicides were excluded from five of the experiments, whereas the 2018 Quincy, FL, experiment included eight applications on a 15-day interval. Across individual experiments, significant suppression of defoliation caused by late leaf spot was observed from 64 to 147 days after planting. Although more variable within location-years, pod yield following phorate treatment was overall significantly greater than for nontreated peanut (2,330 compared with 2,030 kg/ha; P = 0.0794). The consistent defoliation suppression potential was estimated to confer an average potential net economic yield savings of $90 to $120 per hectare under analogous leaf spot defoliation. To our knowledge, these are the first data in the 61 years since its registration demonstrating significant suppression of leaf spot on peanut following application of phorate in-furrow at planting. Results support phorate use in peanut as an effective and economical tactic to incorporate to manage late and early leaf spot infections and development of fungicide resistance
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|a Journal Article
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|a Arachis hypogaea
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| 650 |
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|a Cercosporidium personatum
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| 650 |
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|a Nothopassalora personata
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| 650 |
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|a Thimet
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| 650 |
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|a groundnut
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| 700 |
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|a Thomas, James S
|e verfasserin
|4 aut
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| 700 |
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|a Wright, David L
|e verfasserin
|4 aut
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|a Dufault, Nicholas S
|e verfasserin
|4 aut
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| 700 |
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|a Small, Ian M
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Plant disease
|d 1997
|g (2020) vom: 08. Sept., Seite PDIS03200547RE
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|x 0191-2917
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|g year:2020
|g day:08
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|g pages:PDIS03200547RE
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|u http://dx.doi.org/10.1094/PDIS-03-20-0547-RE
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