In vitro studies on the effects of fungicides on beneficial fungi of peach twig mycoflora
In vitro studies were carried out to investigate a possible integrated use of chemical and biological means to control the peach twig blight pathogen, Monilinia laxa. Three fungal antagonists of M. laxa (Penicillium purpurogenum, Penicillium frequentans and Epicoccum nigrum) and six fungicides (vinclozolin, iprodione, thiram, captan, benomyl and thiophanate-methyl) were used in the study. Sensitivity of the fungal isolates to the fungicides was determined in vitro by calculating ED50 values. Benomyl and thiophanate-methyl were the most fungitoxic compounds and captan was the least fungitoxic. M. laxa and P. purpurogenum were the most sensitive to all chemicals tested, while E. nigrum and P. frequentans presented bigger differences in their sensitivity to chemicals compared to M. laxa. E. nigrum was consistently less sensitive to benomyl (ED50=2.26 ppm), thiophanate-methyl (ED50=9.61 ppm) and vinclozolin (ED50=3.89 ppm) than the other fungi. P. frequentans was less sensitive to captan, vinclozolin, iprodione, thiophanate-methyl and thiram than M. laxa (8, 7, 5, 4 and 2 times respectively). These results suggest that E. nigrum and P. frequentans could be successfully used in an integrated control programme that combines biological and chemical methods. © 1994 Kluwer Academic Publishers.
| Main Authors: | , , |
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| Format: | artículo biblioteca |
| Language: | English |
| Published: |
Springer
1994
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| Subjects: | Epicoccum nigrum, Fungicides, Integrated control, Monilinia laxa, Penicillium frequentans, Penicillium purpurogenum, |
| Online Access: | http://hdl.handle.net/20.500.12792/6068 http://hdl.handle.net/10261/291291 |
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| Summary: | In vitro studies were carried out to investigate a possible integrated use of chemical and biological means to control the peach twig blight pathogen, Monilinia laxa. Three fungal antagonists of M. laxa (Penicillium purpurogenum, Penicillium frequentans and Epicoccum nigrum) and six fungicides (vinclozolin, iprodione, thiram, captan, benomyl and thiophanate-methyl) were used in the study. Sensitivity of the fungal isolates to the fungicides was determined in vitro by calculating ED50 values. Benomyl and thiophanate-methyl were the most fungitoxic compounds and captan was the least fungitoxic. M. laxa and P. purpurogenum were the most sensitive to all chemicals tested, while E. nigrum and P. frequentans presented bigger differences in their sensitivity to chemicals compared to M. laxa. E. nigrum was consistently less sensitive to benomyl (ED50=2.26 ppm), thiophanate-methyl (ED50=9.61 ppm) and vinclozolin (ED50=3.89 ppm) than the other fungi. P. frequentans was less sensitive to captan, vinclozolin, iprodione, thiophanate-methyl and thiram than M. laxa (8, 7, 5, 4 and 2 times respectively). These results suggest that E. nigrum and P. frequentans could be successfully used in an integrated control programme that combines biological and chemical methods. © 1994 Kluwer Academic Publishers. |
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