incidência de doenças fúngicas e sanidade de sementes de trigo sob diferentes doses de nitrogênio e aplicação de fungicida incidence of fungal diseases and wheat seed health, under different nitrogen rates, and fungicide application

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ID: 168269
2008
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Abstract
As doenças fúngicas na cultura do trigo são responsáveis pela redução da produtividade, além de aumentar o custo de produção da cultura, em virtude da necessidade de aplicação de fungicidas para o seu controle. Muitos patógenos são transmitidos pelas sementes e desempenham um importante papel na epidemiologia das doenças. O trabalho teve com objetivo verificar o efeito de doses de nitrogênio sobre a severidade de doenças fúngicas e a sanidade de sementes de duas cultivares de trigo, IAC-24 e IAC-60, com e sem aplicação do fungicida propiconazole. Os resultados mostraram efeito polinomial das doses de N para a severidade da mancha marrom (Bipolaris sorokiniana) nas folhas e linear para as sementes, na ausência do fungicida, para ambas as cultivares.
Many fungal diseases on wheat are responsible for yield loss and besides increasing production cost due to the fungicide application. Many pathogens are seedborne and play an important role in disease epidemiology. The present work was carried out to verify the effect of nitrogen rates and propiconazole application on fungal disease severity and seed health of two wheat cultivars, 'IAC-24' and 'IAC-60'. The results showed a polinomial effect of N rates on the severity of Bipolaris sorokiniana on leaves and a linear effect on seeds, in the absence of fungicide application, for both cultivars.
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Authors ;Maria Aparecida de Souza Tanaka;José Guilherme de Freitas;Priscila Fratin Medina
Journal research on chemical intermediates
Year 2008
DOI
10.1590/S0100-54052008000400002
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-54052008000400002
Keywords
triticum aestivum

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