Fig 2. The symptoms on the bird’s-nest fern leaves 21 days after inoculated with different host-origin Aphelenchoides besseyi isolates.

The bird’s-nest fern leaves inoculated with the (A) Fm, (B) Fsx and (C) Fgk isolates showed typical dark-brown patches. No symptoms were observed on bird’s-nest fern leaves inoculated with the rice-origin (D) Rl and (E) Rdg isolates. Leaves treated with Alternaria citri hyphal suspensions were used as (F) controls. The scale bars represent 10 cm.