The biocontrol effect improved gradually with concentration of the aseptic filtrate solution.
防效随滤液浓度的增加而提高。
PGPR microbial agent also has obvious biocontrol effect and decreased the infection ratio of stem rot caused by S. sclerotiorum.
油菜PGPR菌剂具有明显的生防效果，能降低油菜菌核病的发病率；
The field propagation agent for the biocontrol fungus has the yield increasing effect to the crops after being applied.
生防真菌田间扩繁剂施用后对作物还有一定的增产效果。
It's mainly because the effect of biocontrol agents is not as good as chemical fungicide and the fermentation technology of biocontrol agents is not so perfect.
其原因多是由于生防菌单独使用难以达到化学杀菌剂的效果，或活菌制剂的发酵工艺不够完善。
It's mainly because the effect of biocontrol agents is not as good as chemical fungicide and the fermentation technology of biocontrol agents is not so perfect.
其原因多是由于生防菌单独使用难以达到化学杀菌剂的效果，或活菌制剂的发酵工艺不够完善。
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