Avaliação Preliminar Do Uso De Torta De Mamonano Manejo Da Hérnia Das Crucíferas Em Couve-Flor

Abstract

The production of cauliflower and other brassicas has been impacted worldwide due to the occurrence of the disease clubroot,caused by Plasmodiophora brassicae (Wor.). Therefore, it is necessary to search for disease management strategies that may contribute to reducing the losses caused. The objective of this work was to evaluate the effects ofdoses of castor bean cake(CK) on the severityof the disease and on the growth of cauliflower plants. Two experiments were carried out in a greenhouse where, in tubes and pots, respectively. In the first one, the effects of CK doses (0, 10, 20 and 40 Mg ha-1) on the disease incidence and dry mass of the aerial part of plants (DMAP) were evaluated.In the second, theeffects of thedoses of CK (0, 10, 20, 30 and 40 Mg ha-1) on disease severity, root attributes and biomass accumulation in plants were evaluated. Significant differences were observed in incidence, which decreased, and DMAP, that increased,as a function of doses. There were decreases in the severity of the disease and increasesin the growth of healthy roots. In addition, positive effects on plant height, number of leaves and dry mass of leaves, stemsand roots were observed. It is concluded that the use of castor bean cake was promising and further studies should be performed under field conditions and with longer cycle times