Evaluación de sensores ópticos para el diagnóstico de Plasmopara viticola en vides

  • A. Calcante Department of Agricultural and Environmental Science, Section of Agricultural Engineering. Università degli Studi di Milano, via Celoria 2, 20133 Milan
  • A. Mena Department of Agricultural and Environmental Science, Section of Agricultural Engineering. Università degli Studi di Milano, via Celoria 2, 20133 Milan
  • F. Mazzetto Faculty of Science and Technology. Free University of Bozen. Piazza Università 5, 39100 Bozen
Palabras clave: Crop Circle, diagnóstico de hongos fitopatógenos, estado sanitario de la planta, GreenSeeker, NDVI, sensores locales

Resumen

El presente estudio describe la posibilidad de utilizar dos sensores ópticos comerciales, el GreenSeeker RT100 y el Crop Circle, para identificar diferentes niveles de síntomas de mildiu en vid. La experimentación ha sido realizada en hojas de vid cv. Cabernet Franc infectadas por Plasmopara viticola. Las hojas se dividieron en ocho clases homogéneas por nivel de infección y analizadas (en las caras superiores) con instrumentos ópticos y con un espectrofotómetro Vis/NIR (visible/infrarrojo), utilizado como testigo. Los resultados muestran la presencia de una regresión lineal entre el porcentaje de superficie foliar con síntomas y el índice NVDI calculado por medio de los sensores ópticos (R2 = 0,708 para GreenSeeker; R2 = 0,599 para Crop Circle; R2 = 0,950 para el espectrofotómetro). La regresión obtenida con el GreenSeeker es más significativa que la obtenida con el Crop Circle. Esto sugiere una mayor capacidad del GreenSeeker para detectar diferentes niveles de infección. Por último, las mediciones realizadas por medio de los dos sensores comerciales en el envés de las hojas mostraron valores de NVDI menores que los obtenidos en la cara superior, así como un menor rango de valores. Por lo tanto, la identificación de las diferentes clases de infección fue más difícil de realizar en el envés de las hojas. El presente estudio permitirá, en el futuro, aplicar estos sensores ópticos al diagnóstico directamente en los viñedos.

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Biografía del autor/a

A. Calcante, Department of Agricultural and Environmental Science, Section of Agricultural Engineering. Università degli Studi di Milano, via Celoria 2, 20133 Milan
Department of Agricultural Engineering, Assistant Professor

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Publicado
2012-07-09
Cómo citar
Calcante, A., Mena, A., & Mazzetto, F. (2012). Evaluación de sensores ópticos para el diagnóstico de Plasmopara viticola en vides. Spanish Journal of Agricultural Research, 10(3), 619-630. https://doi.org/10.5424/sjar/2012103-619-11
Sección
Agricultural engineering