Strategies for reducing the impact of clubroot on broccoli cultivation in tropical mountain regions

Brassica spp. production can be negatively affected by clubroot, which is caused the protozoan Plasmodiophora brassicae Woronin. Most of information on clubroot control derived from studies in temperate regions. Here, management strategies were evaluated to reduce broccoli (Brassica oleracea L. var. italica Plenck) crop losses owing tropical mountain The first experiment revealed effect green manure coriander (Coriandrum sativum L.), sunn hemp (Crotalaria juncea sweet corn (Zea mays and spontaneous vegetation (control) associated with seedlings 4 different sizes. In second experiment, soil amendments (limestone steel slag) conjunction poultry litter (fresh or composted for 45 days) without (control), was assessed. Both field experiments sought evaluate disease intensity, plant development (root growth, biomass, nutrient accumulation), yield. Sunn biomass resulted higher healthy root volumes dry weights broccoli. However, such benefits not treatment. Compared smaller (10 mL cell 20 days age, 16 24 age), use larger (35 28 50 32 age) lower intensity increased average yield 143% summer crops. Steel slag, like limestone, corrected acidity growth; however, significantly affected. Fresh percentage diseased roots compared control; treatments. Using (sunn coriander) well-developed recommended as a strategy induced during cultivation.