1, leaves: it can occur from seedling stage to adult stage, with light green spots on the front of the leaves, and then gradually turn yellow to round spots, with white paint blisters on the back. The front of the lesion is yellowish green with yellow halo around it.

2. Stem: The lesion on the stem is a long oval white blister, and the lesion is swollen and curved, showing a "faucet shape".