Efecto de Agrozoil en el control de Mildiú Velloso (Pseudoperonospora cubensis) en el cultivo de zucchini (Cucurbita pepo L.) variedad “Modena

Abstract

The objective of the research was to evaluate the effect of ozonized oil in the control of downy mildew in the zucchini crop (Cucurbita pepo L.) variety "Modena", in the San Jose hamlet belonging to the Constantino Fernandez parish, Ambato canton of the province of Tungurahua, in open field. A split-plot experimental design was used, being the main plot the three doses of Agrozoil (3cc/L; 5cc/L; 7cc/L) and the sub-plots the frequencies (7 days, 14 days and 21 days) of application, structured in randomized blocks, with three replications. The applications were carried out during two months at 35 days after sowing the crop. The variables evaluated were the percentage of severity and incidence of Pseudoperonospora cubensis on leaves and fruit (number, size, diameter, weight and yield). The results, according to the statistical analysis at the end of data collection (60 days after the first application), showed that the best treatments were D2F2 (5cc/L; 14 days) with values of 55.43% in the incidence control and 25.71% in the severity control (30 days after the first application). Regarding the fruit variables studied, the treatments that obtained the best results were D2F2 (5cc/L; 14 days) with a number of fruits of 2.67, a diameter of 7.67 cm, caliber of 30.40cm, weight of 2041.75g with an average yield per kilogram of fruit per plant and expressed in Kg/Ha with a value of 25206. 74Kg/Ha, which shows that the D2F2 treatment (5cc/L. 14 days) obtained the best results; 14 days) obtained the best results, demonstrating that ozonized oil is effective in controlling Pseudoperonospora cubensis, preventing the plant from reducing its yield.