Figure 3.

Control efficiencies of B‐36 post‐inoculation on lotus rot caused by Fusarium oxysporum. The pathogen F. oxysporum was pre‐inoculated on all the lotus plants tested. Negative and positive controls were set up by injecting sterilized water into lotus stems (a) and spraying carbendazim on lotus leaves (b), respectively. At 7 dpi, B‐36 was inoculated on lotus plants as follows: foliar spraying of B‐36 suspension (c) and injecting 200 (d), 400 (e), and 800 μl B‐36 suspension (f) per plant into stems. Growth status and disease index of lotus plants with different treatments were investigated at 30, 60, and 90 dpi of B‐36 (g) (□ disease index; ■ control effects). Values are means ± SE, n = 6. Different letters above the bars denote a significant difference at P < 0·05 according to Duncan’s multi‐range test. [Colour figure can be viewed at https://www.wileyonlinelibrary.com]