Evaluación de dos fungicidas y tres bioproductos para el control de Plasmodiophora brassicae Woronin en el rendimiento del brócoli (Brassica oleracea var. italica).

Abstract

This research aimed to evaluate the effect of two fungicides and three bioproducts to control the Plasmodiophora brassicae Woronin on the yield of broccoli (Brassica oleraceae var italica). A randomized complete block design with five treatments, a control and four replicates were used. Each experimental unit consisted of 32 plants. These were evaluated on incidence and severity of the disease, height, head weight, head diameter, fresh weight of roots and yield. For the evaluation of incidence, symptoms were observed every 8 days after transplanting, height was evaluated every 15 days after transplanting, the diameter of the head was measured 73 days after transplanting every 15 days. Severity, head weight, fresh weight of roots and yield were determined at the time of harvest, and it was expressed in kg/ha. The variables were analyzed statistically using R Studio software version 4.2.2. The results showed that the plants treated with cyazofamide in the severity variable obtained the lowest degree of affectation with 62 %; while Fluazinam, Trichoderma harzianum, Bacillus subtilis, Trichoderma harzianum + B. subtilis and control presented 79 %, 82 %, 78 %, 76 % and 78 % respectively. Thus, it was concluded that cyazofamide generated the best yield with 13 923 kg/ha. It is recommended to study different doses of cyazofamid to improve the efficacy.