| Autor: |
Mello, Flávia Elis de, Mathioni, Sandra Marisa, Matos, Victoria Oasis Regis Lessa, da Silva, Monikéli Aparecida, Marques, Douglas Braga, Rambach, Odile, Torriani, Stefano F. F., Deuner, Carolina Cardoso, Antunes, Ricardo Francisco Desjardins |
| Zdroj: |
Tropical Plant Pathology; 20230101, Issue: Preprints p1-10, 10p |
| Abstrakt: |
Anthracnose disease caused by Colletotrichumspecies has resulted in increased economic losses on soybean fields in Brazil. For the disease management, fungicide is the main disease control strategy used. Recently, variations in field performance of fungicides on anthracnose have been observed and were speculated to be a result of distinct Colletotrichumspecies occurring in the fields. Therefore, this study aimed to identify the species occurring in the sampled soybean fields and evaluate the sensitivity of 30 Colletotrichumsamples collected from 2021 and 2022 seasons to benzovindiflupyr (BVF), fluxapyroxad (FXD), inpyrfluxam (IPFX), difenoconazole (DFZ), prothioconazole (PTZ) and mefentrifluconazole (MFTZ). Twenty-three samples were identified as C. plurivorumand seven samples were identified as C. truncatumbased on molecular analysis. The SDHI fungicide BVF, and DMIs DFZ and PTZ, showed higher fungitoxicity against C. plurivorumand C. truncatumthan the other fungicides tested. BVF showed the same intrinsic activity on both C. plurivorumand C. truncatum. To our knowledge, this is the first study reporting the sensitivity of Colletotrichumspecies to six fungicides and showed the C. plurivorumand C. truncatumtested samples were more sensitive to BVF, PTZ, and DFZ than to FXD, IPFX, and MFTZ.These results add important information for anthracnose and anti-resistance management on soybean using SDHI and DMIs fungicides. |
| Databáze: |
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