The Application of Bacillus thuringiensis to Treat Root Knots on Pogostemon cablin Benth

Abstract

Abstract Root knots, caused by Meloidogyne spp. is among the plant pathogens that lead to significant yield loss in patchouli plants. Farmers have used synthetic nematicides to control the pathogen for many years. In fact, the chemicals not only harm the environment but also might degrade quality of agriculture products. Therefore, in this study, we examined several dosages of Bacillus thuringiensis (Bt) to control Meloidogyne spp. on Pogostemon cablin Benth. Three dosages of Bt suspension (30, 40, and 50 ml/plant) were applied to the rhizosphere to observe the incubation period, disease intensity, number of galls, and the population of nematode. The results show that 40 ml/plant of Bt significantly prolongs the incubation time, reduces the disease intensity, and the number of root-knots. None of the dosages tested showed a significant impact on the nematode population. This study showcases the potential of Bt to control Meloidogyne spp. on patchouli plants. More research is required to confirm the efficacy of this approach.