Efficacy of Paenibacillus polymyxa P1 1.5 billion CFU/mL SC against clubroot disease and its safety on pakchoi
In order to evaluate the efficacy of Paenibacillus polymyxa P1 1.5 billion CFU/mL SC against clubroot disease on pakchoi,laboratory bioactivity determination and field trial were carrieded out.The results of laboratory bioactivities showed that Paenibacillus polymyxa P1 had good effects on clubroot disease.The results of laboratory safety test showed that Paenibacillus polymyxa P1 1.5 billion CFU/mL SC had little influences on its emergence and growth.The results of field efficacy trial showed that Paenibacillus polymyxa P1 1.5 billion CFU/mL SC had significant efficacies against clubroot disease and was safe to pakchoi.At the dosages of 15,22.5,30 L/hm2,the control effects were 49.5%-71.8%,60.2%-75.5%,66.0%-80.4%,respectively.