2009
DOI: 10.1590/s1413-70542009000300007
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Efeito de fungicidas sistêmico e protetores aplicados em diferentes estádios fenológicos no controle da ferrugem asiática da soja

Abstract: RESUMOObjetivou-se, neste trabalho, verificar o efeito dos fungicidas oxicloreto de cobre, tiofanato metílico, tiofanato metílico + clorotalonil e clorotalonil em diferentes estádios fenológicos V 6 , R 1 , R 5 , V 6 + R 1 , V 6 + R 5 e R 1 + R 5 no controle da ferrugem asiática da soja. O estudo foi conduzido na área experimental do Departamento de Agricultura da Universidade Federal de Lavras. Observou-se efeito significativo de controle da ferrugem asiática para todos os fungicidas avaliados. A aplicação de… Show more

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Cited by 7 publications
(7 citation statements)
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“…Pyraclostrobin + epoxiconazole (T5) showed the highest yield (3,964 kg ha -1 ), with an increase of 2,036 kg compared to the control, which had the highest AUDPC (Figure 1 and 2). The better average yields and greater efficacy in controlling Asian rust by the mixture of epoxiconazole + pyraclostrobin (T5) was reported by Silva Júnior et al (2009) and Reis et al (2007).…”
Section: Resultsmentioning
confidence: 91%
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“…Pyraclostrobin + epoxiconazole (T5) showed the highest yield (3,964 kg ha -1 ), with an increase of 2,036 kg compared to the control, which had the highest AUDPC (Figure 1 and 2). The better average yields and greater efficacy in controlling Asian rust by the mixture of epoxiconazole + pyraclostrobin (T5) was reported by Silva Júnior et al (2009) and Reis et al (2007).…”
Section: Resultsmentioning
confidence: 91%
“…In the county of Chapadão do Sul, MS (location one), the control plots had the highest AUDPC, followed by the separate applications of tebuconazole and cyproconazole, which did not differ among themselves or the control in terms of the percentage of defoliation or yield (Figure 2 and 3), demonstrating the loss of sensitivity in the rust population to some products in the triazole group, which did not show the same efficacy as previous crop seasons (REIS et al, 2007;SILVA JÚNIOR et al, 2009). Although the mixtures differed regarding their AUDPC values, they still significantly reduced the severity of the disease but there were no statistical differences among them regarding yield.…”
Section: Resultsmentioning
confidence: 95%
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“…A sobrevivência dos uredinosporos é bastante afetada pela temperatura e umidade relativa. Uredinosporos expostos a temperaturas acima de 40°C e umidade relativa entre 12 a 20%, mostraram-se inviaveis após 4 a 6 h. Esporos em folhas mantidas a 25° C, com 34% umidade relativa sobreviveram por apenas 15 h (Twizeyimana & Hartman 2010 (Del Ponte et al 2006;Del Ponte, 2007;Tsukahara et al 2008). …”
Section: Resultsunclassified
“…Esses resultados concordam com aqueles obtidos por Miles et al (2007), que também observaram menores níveis de severidade e de desfolha pela ferrugem asiática quando triazóis e estrobilurinas foram aplicados de forma conjunta em relação ao emprego isolado de triazóis. Da mesma forma, o fungicida piraclostrobina + epoxiconazol foi mais eficiente no controle da ferrugema asiática do que oxicloreto de cobre, tiofanato metílico, tiofanato metílico + clorotalonil e clorotalonil (Silva Júnior et al, 2009).…”
Section: Methodsunclassified