Abstract

HENRIQUEZ-DIAZ, Félix Michel et al. Effect of Quitomax on downy mildew control in the cucumber crop (Cucumis sativus L.). Ecosistemas y recur. agropecuarios [online]. 2020, vol.7, n.2, e2479.  Epub Dec 22, 2020. ISSN 2007-901X.  https://doi.org/10.19136/era.a7n2.2479.

The effect of Quitomax ® on the incidence and severity of downy mildew (Pseudoperonospora cubensis Rostw.) in cucumber planted on protected crop was evaluated. Cucumber seedlings cv. HA-436, ATAR with 15 days were transplanted to a greenhouse type A12, where they received the phytotechnical work. Three doses of Quitomax ® (300, 500 and 1000 mg ha -1) were applied as treatments, at two moments, 15 and 40 days after transplantation (DDT), as well as the Verita® fungicide, all treatments distributed in a completely randomized experimental design. with four replicas. The incidence and severity of mildew at 30, 40, 50 and 60 DDT, the yield and quality of fruits were evaluated. It was found that 1000 mg ha -1 of Quitomax ® applied at 15 and 40 days provoked a lower incidence and severity of the disease than the fungicide treatment, as well as a higher yield with 90.5 t ha -1 and a greater quantity of first quality fruits.

Keywords : Disease; vegetable; incidence; chitosan; severity.

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