Efficacy of Bordeaux mixture in reducing pecan scab in the southeastern USA
| Autor: | David I. Shapiro-Ilan, Timothy B. Brenneman, Michael W. Hotchkiss, R. F. Mizell, Lenny Wells, Clive H. Bock, Jason Brock |
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| Rok vydání: | 2018 |
| Předmět: |
Bordeaux mixture
Sowing Carya illinoinensis 04 agricultural and veterinary sciences Pecan scab 010501 environmental sciences Biology medicine.disease 01 natural sciences food.food Fungicide Horticulture food 040103 agronomy & agriculture medicine Organic farming 0401 agriculture forestry and fisheries Cultivar Orchard General Agricultural and Biological Sciences 0105 earth and related environmental sciences |
| Zdroj: | Organic Agriculture. 9:189-198 |
| ISSN: | 1879-4246 1879-4238 |
| DOI: | 10.1007/s13165-018-0218-x |
| Popis: | Pecan scab (Venturia effusa) is the most important yield-limiting disease of pecan (Carya illinoinensis) in the southeastern USA. On susceptible cultivars, which are widely grown, conventional fungicides are applied intensively to minimize losses to the disease. Producers of organic pecan must either select resistant cultivars at planting or find alternative methods to manage scab if the cultivars are susceptible. There has been little research on the efficacy of organic products against scab, although historically, Bordeaux mixture was applied (until the late 1950s). We assessed the efficacy of Bordeaux mixture on the cultivar Stuart at two locations in Georgia from 2011 to 2016. Rainfall varied among seasons and locations and impacted severity on the non-treated controls. Thus, on mature fruit at the end of the season, the most severe scab occurred at the Colquitt location (46.63 to 71.84% fruit area diseased) compared to the Byron location (2.98 to 25.27% fruit area diseased). There was a significant reduction in the severity of scab on fruit due to the Bordeaux mixture treatment at the Byron location in 2011 (F = 17.0, P |
| Databáze: | OpenAIRE |
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