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Registro Completo
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
04/05/1993 |
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Data da última atualização: |
01/06/2009 |
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Autoria: |
HENNING, A. A. |
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Afiliação: |
EMBRAPA-CNPSo. Londrina, PR. |
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Título: |
Evaluation of foliar fungicides on soybean. |
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Ano de publicação: |
1977 |
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Fonte/Imprenta: |
Mississippi State: Mississippi State University, 1977. |
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Páginas: |
68p. |
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Idioma: |
Inglês |
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Notas: |
M.Sc. Thesis. |
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Conteúdo: |
Soybean diseases frequently cause yield reductions and low quality seed. Recently, foliar application of fungicides has been reported to increase yield and improve seed quality in soybean. In this study, the effect of four foliar fungicides on leaf disease severity and leaf retention, yield components, yield, and seed infection, as well as the effect os spray timing and number of benomyl applications on the seed quality of Forrest soybean were investigated. Distinct differences were observed in the incidence of leaf diseases and leaf retention. Sprayed plants remained green longer than the controls. Yield increases were observed but they were not significant at the 5% level of probability. The effect of the fungicides on the yield components studied did not explain the observed yield increases; olny the 250-seed weight was significantly increased in some causes. The number of seed per pod and pods per plant were not increased by the treatments. Diaporthe phaseolorum was the most frequent fungus isolated from surface-sterilized seed. All fungicides reduced the incidence of seedborne fungi, but not statistically significant results were found. The overall results of this work showed that benomyl was, in all cases, the most effective fungicide, followed by chlorothalonil, thiabendazole, and pyrithione in order. In regard to seed quality, no advantage was found in adding a third fungicide application nor in delaying the normal spray schedule; although, the percentage of infected seed was reduced in both cases. Two fungicide applications (normal treatment) resulted in higher germination and vigor; however, only the vigor was significantly increased by the treatments. The 25-seed weight and the leaf retention were significantly increased over the control and other treatments when a third spray was adde to the normal schedule. MenosSoybean diseases frequently cause yield reductions and low quality seed. Recently, foliar application of fungicides has been reported to increase yield and improve seed quality in soybean. In this study, the effect of four foliar fungicides on leaf disease severity and leaf retention, yield components, yield, and seed infection, as well as the effect os spray timing and number of benomyl applications on the seed quality of Forrest soybean were investigated. Distinct differences were observed in the incidence of leaf diseases and leaf retention. Sprayed plants remained green longer than the controls. Yield increases were observed but they were not significant at the 5% level of probability. The effect of the fungicides on the yield components studied did not explain the observed yield increases; olny the 250-seed weight was significantly increased in some causes. The number of seed per pod and pods per plant were not increased by the treatments. Diaporthe phaseolorum was the most frequent fungus isolated from surface-sterilized seed. All fungicides reduced the incidence of seedborne fungi, but not statistically significant results were found. The overall results of this work showed that benomyl was, in all cases, the most effective fungicide, followed by chlorothalonil, thiabendazole, and pyrithione in order. In regard to seed quality, no advantage was found in adding a third fungicide application nor in delaying the normal spray schedule; although, the percentage of infected... Mostrar Tudo |
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Palavras-Chave: |
EUA; Evaluation; Foliar; Foliar fungicide; Fungicida foliar; Soybean; USA. |
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Thesagro: |
Fungicida; Glycine Max; Soja. |
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Thesaurus NAL: |
fungicides. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02484nam a2200265 a 4500
001 1444384
005 2009-06-01
008 1977 bl uuuu m 00u1 u #d
100 1 $aHENNING, A. A.
245 $aEvaluation of foliar fungicides on soybean.
260 $aMississippi State: Mississippi State University$c1977
300 $a68p.
500 $aM.Sc. Thesis.
520 $aSoybean diseases frequently cause yield reductions and low quality seed. Recently, foliar application of fungicides has been reported to increase yield and improve seed quality in soybean. In this study, the effect of four foliar fungicides on leaf disease severity and leaf retention, yield components, yield, and seed infection, as well as the effect os spray timing and number of benomyl applications on the seed quality of Forrest soybean were investigated. Distinct differences were observed in the incidence of leaf diseases and leaf retention. Sprayed plants remained green longer than the controls. Yield increases were observed but they were not significant at the 5% level of probability. The effect of the fungicides on the yield components studied did not explain the observed yield increases; olny the 250-seed weight was significantly increased in some causes. The number of seed per pod and pods per plant were not increased by the treatments. Diaporthe phaseolorum was the most frequent fungus isolated from surface-sterilized seed. All fungicides reduced the incidence of seedborne fungi, but not statistically significant results were found. The overall results of this work showed that benomyl was, in all cases, the most effective fungicide, followed by chlorothalonil, thiabendazole, and pyrithione in order. In regard to seed quality, no advantage was found in adding a third fungicide application nor in delaying the normal spray schedule; although, the percentage of infected seed was reduced in both cases. Two fungicide applications (normal treatment) resulted in higher germination and vigor; however, only the vigor was significantly increased by the treatments. The 25-seed weight and the leaf retention were significantly increased over the control and other treatments when a third spray was adde to the normal schedule.
650 $afungicides
650 $aFungicida
650 $aGlycine Max
650 $aSoja
653 $aEUA
653 $aEvaluation
653 $aFoliar
653 $aFoliar fungicide
653 $aFungicida foliar
653 $aSoybean
653 $aUSA
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