IMICO   27341
INSTITUTO DE INVESTIGACION EN MICOLOGIA Y MICOTOXICOLOGIA
Unidad Ejecutora - UE
artículos
Título:
Development and validation of diagrammatic scales to evaluate damage by the two-spotted spider mite (Tetranychus urticae) in peanut
Autor/es:
CRENNA ANA CECILIA; GIUGGIA JORGE ANTONIO; FERRARI SANTIAGO; ODDINO CLAUDIO; GIORDANO FRANCISCO; GIOVANINI DIEGO
Revista:
Revista De La Facultad De Ciencias Agrarias UNCuyo
Editorial:
Centro Coordinador de Ediciones Académicas (UNCuyo)
Referencias:
Lugar: Mendoza; Año: 2021 vol. 53 p. 254 - 261
ISSN:
1853-8665
Resumen:
Argentina is the second largest peanut (Arachis hypogaea L.) exporter in the world. The main peanut pest in our country is the two-spotted spider mite (Tetranychus urticae Koch 1836). To date, there is no validated method to quantify this pest. The aim of this work was to develop and validate a logarithmic diagrammatic scale to assess damage by the two-spotted spider mite in peanut. In 2015-16, 200 leaflets were collected from a plot infested with the pest. Damaged leaf area (DLA) was calculated using SisCob software. Six-, seven-, eight- and nine-class scales were proposed. Mean values for each class and scale were obtained with 2-LOG. Leaflets were analyzed by 13 raters who used the four proposed scales. Precision and accuracy were determined by simple linear regression between the DLA and estimated damaged leaf area. Reproducibility was determined by linear regression between estimates of raters combined in pairs. The seven-class scale was the best validated one for all the parameters. Most raters showed constant deviations and overestimated DLA, whereas only one rater presented systematic deviations. This seven-class scale is the first developed and validated one to evaluate two-spotted spider mite damage to peanut in Argentina.