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IMPORTANT NOTICE: Please read first!

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IMPORTANT NOTICE: Please read first!

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  1. DISCLAIMER: The following translated document originates from Brazil, is based on Brazilian data and experience, and was developed by EMBRAPA for Brazilian farmers. Aspects of SBR development and fungicide efficacy comparisons may not be the same under U.S. and Brazilian conditions. Similarly, certain control measures suggested by Brazilian officials reflect the unique SBR situation in Brazil, as well as year-round soybean production in certain parts of that country. Therefore, do not use this information for making fungicide purchasing or SBR control decisions in the U.S. Instead, use control measures developed by your state’s Land Grant University scientists. Be advised that fungicide product names for the same active ingredient and manufacturer are typically different for Brazil and the U.S.; however,  the common names for the active ingredient (such as tebuconazole or propiconazole or azoxystrobin) are the same in both countries. For more information or clarification about the translated document, contact: D. Hershman Extension Plant Pathologist University of Kentucky, Princeton, KY dhershma@uky.edu IMPORTANT NOTICE: Please read first!

  2. Chemical Control When to control ? Scouting fields/sentinels to observe at the earliest sign of infcetion. Spray right after first symptoms are observed (pustules on plant botton leaves) or spray preventively, considering: Presence of symptoms in the sentinel plots, Reduced operational capacity, Favorable weather conditions, Plant development stage, Rust present in the region, Incidence of other diseases (broad range fungicide).

  3. Number of sprays? Stage of plant development when rust occurs Reincidence of rust Cost/benefits of the treatment (V2?) Vegetative Reproductive W.M.Paiva

  4. Products Registered for rust control in Brazil AGROFIT www.agricultura.gov.br

  5. Soybean rust Active ingredient Rate (g i.a./ha) Comercial product 1 - Check 2 - azoxystrobin 50 Priori 3 - difenoconazole 50 Score 4 - tetraconazole 50 Domark 5 - fluquinconazole 62,5 Palisade 6 - flutriafol 62,5 Impact 7 - tebuconazole 250 100 Orius 8 - tebuconazole 200 100 Folicur 9 - myclobutanil 100 Systhane 10 - pyraclostrobin + epoxiconazole 66,5+25 Opera 11 - trifloxystrobin + ciproconazole 56,2+24 Sphere 12 - azoxystrobin + ciproconazole 60+24 Priori Xtra 13 - trifloxystrobin + propiconazole 50+50 Stratego 14 - propiconazole 125 Juno 15 - epoxiconazole 37,5 Opus

  6. Fungicidas registrados no MAPA para o controle da ferrugem da soja (Phakopsora pachyrhizi) - observar cadastro no estado continua

  7. continuação Fungicidas registrados no MAPA para o controle da ferrugem da soja (Phakopsora pachyrhizi) - observar cadastro no estado

  8. Spray Technology N.S. Almeida

  9. Efficiency of fungicides is closely related to spray techniques IMPORTANT Reach the target with an adequate coverage. (minimun 60 drops/cm2)) J.T. Yorinori

  10. The Green Bridge Problem Primavera do Leste, MT – 2003

  11. A. Tschanz A. Tschanz C.V.Godoy RESISTANCE Lesion type TAN – no necrosis J.T. Yorinori Lesion type RB - reddish brown

  12. Resistance: • There are four major genes: Rpp1, Rpp2, Rpp3 e Rpp4 • Resistant cultivars BRS 134 BRSMS Bacuri CS 201 FT-2 FT-3 FT-17 FT-2001 Campos Gerais KIS 601 Ocepar 7

  13. Tianá Pirarara

  14. Tianá MTBR 19923

  15. Screening Genotypes

  16. STRATEGIES FOR CONTROL • Crop Management between seasons • Eliminate volunteer plants • Avoid a second soybean crop (“safrinha”) • Avoid winter irrigated soybeans. Need 3-4 sprays

  17. Early sowing with early maturing cultivars = SCAPE Spray at the right time.

  18. W.M. Paiva W.M. Paiva Soybean Volunteer plant Kudzu (Pueraria lobata)

  19. Kudzu infected with rust and soybeans, side by side in Paraguai.

  20. Early plantings producing inocula for late plantings J.T. Yorinori

  21. Scouting and Chemical Control Plot Sentinels Susceptible cultivars sowed before normal time without fungicide treatment

  22. Scouting and Chemical Control Make the scouting as large as possible, keeping more attention to the first sowings and humid areas • Walking and frequency of sampling: • after emergence and intensify after flowering; • after evidences of infection in the region

  23. Scouting and Chemical Control Colect middle and bottom leaves J.T. Yorinori J.T. Yorinori

  24. Scouting and Chemical Control Look for symptoms of rust

  25. Scouting and Chemical Control Incubate leaves for easy diagnosis In case of doubt, send leaves to well trained laboratory for diagnosis J.T.Yorinori

  26. Laboratories localized in the principal regions http://www.cnpso.embrapa.br/alerta

  27. Rust Dispersion Information System http://www.cnpso.embrapa.br/alerta

  28. Thank you for yor attention!

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