Elaboración y validación de un diagrama de área estándar para la cuantificación de la mancha foliar en arroz

Abstract

CONDITION FOR PUBLICATION OF PROJECT. Rice is one of the most important crops in the world. Its production is affected by biotic and abiotic factors, posing a risk to food security. Alternaria padwickii is part of the complex of organisms responsible for grain discoloration and is the main cause of stackburn disease. Currently, there’s no tool available to estimate the severity of this disease on leaves. So, the objective of this study is to develop a Standard Area Diagram (SAD) to facilitate such estimations. The SAD was developed using real images and the R programming language through the pliman library. The data were analyzed using equivalence tests and mean comparisons via Student’s t-tests. The results showed that the developed SAD significantly improved (p < 0.05) the precision, accuracy, and agreement when is used by experienced evaluators. However, when used by inexperienced evaluators, the t-test showed that the SAD didn’t improve accuracy. Therefore, the developed SAD greatly enhances precision, accuracy, and agreement when used by experienced evaluators. Keywords: stackburn disease, R, pliman, SAD, agreement