Healthy And Diseased Area Of The Leaf
Mostrando 1-3 de 3 artigos, teses e dissertações.
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1. Alternativas para avaliaÃÃo de severidade da mancha-angular no feijoeiro comum / Alternatives for evaluation of angular leaf spot severity in the common bean
A expansÃo da cultura do feijÃo contribuiu decisivamente para o aumento da sua produÃÃo e da produtividade. Contudo, a semeadura durante todo o ano tem proporcionado o aparecimento de alguns problemas, entre eles o aumento de determinadas doenÃas, especialmente a mancha-angular, causada pelo fungo Pseudocercospora griseola. A adoÃÃo de cultivares resi
Publicado em: 2008
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2. Avaliação de danos e efeito de variáveis ambientais na mancha de alternaria (Alternaria helianthi) em Girassol. / Damage assessment and effect of environmental variables on alternaria leaf spot (Alternaria helianthi) in sunflower.
The development and implementation of integrated disease-management system on sunflower (Helianthus annuus) require precise and accurate information on the damage caused by Alternaria leaf spot (Alternaria helianthi). The objectives of this thesis were: to develop and to validate a diagrammatic scale for Alternaria leaf spot; to determine the influence of te
Publicado em: 2002
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3. Effects of Powdery Mildew Infection on the Efficiency of CO2 Fixation and Light Utilization by Sugar Beet Leaves
Sugar beet leaves (Beta vulgaris L.) infected with powdery mildew (Erysiphe polygoni D.C.) show declining rates of net photosynthesis as the disease develops; relative to healthy controls, reductions of 35, 70, and 75% were observed at 9, 16, and 22 days after inoculation, respectively. A leaf gas exchange procedure in which an air stream flowed through the