Potassium phosphite enhances the antagonistic capability of Bacillus amyloliquefaciens to manage tomato bacterial wilt

Lv Su, Pengfei Qiu, Zhiying Fang, Juan Sun, Xingxia Mo, Yunpeng Liu, Eiko Kuramae, Ruifu Zhang, Biao Shen (Corresponding author), Qirong Shen

Research output: Contribution to journal/periodicalArticleScientificpeer-review

Abstract

Bacterial wilt caused by Ralstonia solanacearum is a distributed and worldwide soil-borne disease. The application of biocontrol microbes or agricultural chemicals has been widely used to manage tomato bacterial wilt. However, whether and how agricultural chemicals affect the antagonistic ability of biocontrol microbes is still unknown. Here, we combined potassium phosphite (K-Phite), an environmentally friendly agricultural chemical, and the biocontrol agent Bacillus amyloliquefaciens QPF8 (strain F8) to manage tomato bacterial wilt disease. First, K-Phite at a concentration of 0.05% (w/v) could significantly inhibit the growth of Ralstonia solanacearum. Second, 0.05% K-Phite enhanced the antagonistic capability of B. amyloliquefaciens F8. Third, the greenhouse soil experiments showed that the control efficiency for tomato bacterial wilt in the combined treatment was significantly higher than that of the application of B. amyloliquefaciens F8 or K-Phite alone. Overall, our results highlighted a novel strategy for the control of tomato bacterial wilt disease via application and revealed a new integrated pattern depending on the enhancement of the antagonistic capability of biocontrol microbes by K-Phite.
Original languageEnglish
JournalPlant Disease
Volumein press
Early online date2021
DOIs
Publication statusE-pub ahead of print - 2021

Keywords

  • international
  • Plan_S-Compliant_NO

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