The Occurrence of Clubroot in Colombia and Its Relationship with Climate and Agronomic Practices

Clubroot, caused by Plasmodiophora brassicae, is a major disease of cruciferous crops in Colombia. Limited information available, however, regarding its distribution or epidemiology this country. The objectives study were to determine the occurrence clubroot main regions Colombia where are grown, and examine relationship between pathogen inoculum density likelihood field infestation with crop management practices climatic information. In total, 127 fields surveyed across eight departments, was estimated, obtained, farmers on their practices. More than half (53.7%) visited found be clubroot-infested DNA detected 91.3% fields. only department symptoms not observed Nariño. infested fields, P. brassicae varied 3 × 102 1 106 resting spores per gram soil, highest Norte de Santander. All other departments had comparable spore loads. Inoculum positively affected field, both loads infestations average temperature.