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 | Acesso ao texto completo restrito à biblioteca da Embrapa Meio Ambiente. Para informações adicionais entre em contato com cnpma.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
22/12/2008 |
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Data da última atualização: |
18/11/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BETTIOL, W.; SILVA, H. S. A.; REIS, R. C. |
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Afiliação: |
WAGNER BETTIOL, CNPMA; Harllen S. A. SIlva, Instituto Biológico; Ronielli C. Reis, UFV. |
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Título: |
Effectiveness of whey against zucchini squash and cucumber powdery mildew. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
Scientia Horticulturae, v. 117, n. 1, p.82-84, 2008. |
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Idioma: |
Inglês |
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Conteúdo: |
The effectiveness of whey against powdery mildew (Podosphaera xanthii) of cucumber and zucchini squash was tested in greenhouse experiments. Plants were sprayed once or twice a week with whey at concentrations of 0, 5, 10, 15, 20, 25, and 30% in water. Severity of powdery mildew was estimated weekly by visual assessment of individual leaves and scored as percentage of leaf area affected. Effectiveness of treatments did not differ significantly when applied weekly compared to twice a week. In each instance, powdery mildew severity correlated negatively with whey concentration. For cucumber, the rate of the disease progress in the control ranged from 0.45 to 0.75. Disease progressedmore slowly in plants treated with 25?30% whey than when lower concentrations were used. The rate of disease progress varied from 0.12 to 0.33 in plants treated once a week and from 0.13 to 0.17 when applied twice a week. Similar tendencies were observed for zucchini, but disease progressedmore rapidly and the final disease severity was higher than in cucumber. Effectiveness of whey applied twice a week at concentrations of 15?30% did not differ significantly among treatments; in these treatments the rate of disease progress was about 0.23 and significantly higher than the value for the water controls (about 0.80). Plants treated with 30% whey often exhibited symptoms of phytotoxicity. The data indicated that whey effectively controlled powdery mildew in cucumber and zucchini. Further studies are needed to optimize the concentration and timing of whey applications for mildew management in commercial crops. MenosThe effectiveness of whey against powdery mildew (Podosphaera xanthii) of cucumber and zucchini squash was tested in greenhouse experiments. Plants were sprayed once or twice a week with whey at concentrations of 0, 5, 10, 15, 20, 25, and 30% in water. Severity of powdery mildew was estimated weekly by visual assessment of individual leaves and scored as percentage of leaf area affected. Effectiveness of treatments did not differ significantly when applied weekly compared to twice a week. In each instance, powdery mildew severity correlated negatively with whey concentration. For cucumber, the rate of the disease progress in the control ranged from 0.45 to 0.75. Disease progressedmore slowly in plants treated with 25?30% whey than when lower concentrations were used. The rate of disease progress varied from 0.12 to 0.33 in plants treated once a week and from 0.13 to 0.17 when applied twice a week. Similar tendencies were observed for zucchini, but disease progressedmore rapidly and the final disease severity was higher than in cucumber. Effectiveness of whey applied twice a week at concentrations of 15?30% did not differ significantly among treatments; in these treatments the rate of disease progress was about 0.23 and significantly higher than the value for the water controls (about 0.80). Plants treated with 30% whey often exhibited symptoms of phytotoxicity. The data indicated that whey effectively controlled powdery mildew in cucumber and zucchini. Further studies are ne... Mostrar Tudo |
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Thesagro: |
Controle biológico; Oídio. |
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Categoria do assunto: |
H Saúde e Patologia |
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Marc: |
LEADER 02098naa a2200169 a 4500
001 1015597
005 2019-11-18
008 2008 bl uuuu u00u1 u #d
100 1 $aBETTIOL, W.
245 $aEffectiveness of whey against zucchini squash and cucumber powdery mildew.$h[electronic resource]
260 $c2008
520 $aThe effectiveness of whey against powdery mildew (Podosphaera xanthii) of cucumber and zucchini squash was tested in greenhouse experiments. Plants were sprayed once or twice a week with whey at concentrations of 0, 5, 10, 15, 20, 25, and 30% in water. Severity of powdery mildew was estimated weekly by visual assessment of individual leaves and scored as percentage of leaf area affected. Effectiveness of treatments did not differ significantly when applied weekly compared to twice a week. In each instance, powdery mildew severity correlated negatively with whey concentration. For cucumber, the rate of the disease progress in the control ranged from 0.45 to 0.75. Disease progressedmore slowly in plants treated with 25?30% whey than when lower concentrations were used. The rate of disease progress varied from 0.12 to 0.33 in plants treated once a week and from 0.13 to 0.17 when applied twice a week. Similar tendencies were observed for zucchini, but disease progressedmore rapidly and the final disease severity was higher than in cucumber. Effectiveness of whey applied twice a week at concentrations of 15?30% did not differ significantly among treatments; in these treatments the rate of disease progress was about 0.23 and significantly higher than the value for the water controls (about 0.80). Plants treated with 30% whey often exhibited symptoms of phytotoxicity. The data indicated that whey effectively controlled powdery mildew in cucumber and zucchini. Further studies are needed to optimize the concentration and timing of whey applications for mildew management in commercial crops.
650 $aControle biológico
650 $aOídio
700 1 $aSILVA, H. S. A.
700 1 $aREIS, R. C.
773 $tScientia Horticulturae$gv. 117, n. 1, p.82-84, 2008.
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