Epidemiological aspects of Septoria spot (Septoria apiicola Speng) in the cultivation of celery Spain on four sowing dates.

Abstract

Septoria is the most important disease of celery in Pamplona, Colombia, and there are few scientific results on this disease in the country. The objective was to evaluate some epidemiological aspects of Septoria apiicola Speng in celery cultivation at four sowing dates. Four sowing dates were evaluated, March, April, August and September of 2022. Meteorological data were taken at the research place. The variables incidence, severity and the Area Under the Disease Progress Curve (ABCPE) were estimated. Correlation and regression analyses were performed with the SPSS statistical package. Septoria appeared between the fourth and fifth week of crop age, with no statistical difference between sowing dates. A correlation of incidence and severity with crop age was evident on all sowing dates, but not always with meteorological variables. Linear and multiple regression models were obtained that were highly significant with crop age and meteorological conditions. The regression analysis showed very high R2 for incidence as a function of crop age with the quadratic model and R2 above 0.82 for severity as a function of age with the logistic model.