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Effect of bacteria isolates in powdery mildew control in flowering dogwoods (Cornus florida L.) |
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| Affiliation: | 1. China Agricultural University, China;2. Cereal and Oil Crops Institute, Hebei Academy of Agriculture and Forestry Sciences, China;3. Hebei University of Engineering, China;1. College of Materials Science and Engineering, Xi''an Shiyou University, Xi''an 710065, PR China;2. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, PR China |
| Abstract: | Five bacterial isolates collected from dogwood leaves were evaluated for powdery mildew control in shadehouse and greenhouse environments by using foliar sprays and/or root drenching. Two isolates displayed superior bioactivity and suppressed powdery mildew similar to conventional fungicide thiophanate methyl (Cleary’s 3336F®). The two bacteria disrupted powdery mildew spore germination and ruptured spore membranes causing spore lyses. Bacterial filtrates without bacterial cells were also effective in suppressing powdery mildew and disrupting spore germination and suggested the involvement of secondary metabolites. The two biocontrol agents (BCAs) colonized roots endophytically and promoted plant growth. |
| Keywords: | Ornamentals Fungicides Oidium spp. Biological control |
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