Tall bamboo shoots are also known as wild rice, water bamboo shoots, wild rice shoots, foot white bamboo shoots, mizuna, mizuna vegetables and so on. It is a unique aquatic vegetable. Ancient people called water bamboo as "Zizania". Before the Tang Dynasty, wild rice was cultivated as a food crop, and its seeds were called Mizuso rice or carving Hu, which is one of the "six grains" (sticky rice, millet, grain, sorghum, wheat, and Mizuso). Later, it was discovered that some mizutaki were infected with black powder fungus and did not twig, and the plant was free of disease, and the stems continued to expand, gradually forming spindle-shaped fleshy stems, which is now edible wild rice. In this way, the black powder fungus is used to prevent wild rice from flowering and fruiting, and the deformed plant with the disease is propagated as a vegetable. Generally, a few black spots do not affect the food, but if too much, try not to eat, because the formation of asparagus is due to the asparagus plant body parasitic black powder fungus stimulation, black spots are also due to the black powder fungus, so a few black spots is not a big problem. However, when the asparagus matures too much and becomes "gray wild rice", it cannot be eaten. "At this point, the black powder mycelium will form a black-brown thick membrane spores, high shoots of the organization is full of black spots, and even all will become black powder, resulting in poor quality or not beneficial to the human body.