Short communicationIdentification of and antimicrobial activity of plant extracts against Pseudomonas putida from rot fruiting bodies of Pleurotus eryngii

- Pseudomonas putida could lead to Pleurotuseryngii fruit body rot,bringing a great loss in production.
- Plant extracts had potential antimicrobial activity against this pathogen in vitro.
- The extract of Ginkgo biloba had the highest efficiency against the rot disease in vivo and vitro.

Recently, rot disease caused by bacteria has seriously affected the yield of Pleurotus eryngii in China, as well as spreading so quickly that brought enormous economy loss to the mushroom industry. Therefore, we isolated and identified the pathogen according to morphologic characteristic and 16S rDNA sequence, which demonstrated that the pathogen was Pseudomonas putida. Simultaneously, the active ingredients of twelve plants were extracted and their antimicrobial activities against the pathogen were evaluated by measuring the inhibition zone. Four better essential oils were selected for further investigation of their disease control efficiency by spraying them on the surface of the mushroom. Overall, the extract of Ginkgo biloba presented the highest efficiency in controlling the rot disease. The results from this research suggest that the extract of plants has a good potential for controlling rot disease in P. eryngii.