皇帝苗的叶子是怎么一回事?

tehxijian

这是自家栽种的皇帝苗，固定浇水没放任何农药，请问叶子表面为什么会出现这样的褐色圈圈？
如果吃进肚子对健康会有影响吗?

nobi_suka

Raise awareness of isolation and self-isolation upon returning from epidemic areas to limit the spread of covid-19 to the community. time calculator