wild rice increased in popularity in the late 20th century, and commercial cultivation began in the U.S. and Canada to supply the increased demand. In 1950, James and Gerald Godward started experimenting with wild rice in a one-acre meadow north of Brainerd, Minnesota. They constructed dikes around the acre, dug ditches for drainage, and put in water controls. In the fall, they tilled the soil. Then, in the spring of 1951, they acquired of seed from Wildlife Nurseries Inc. They scattered the seed onto the soil, diked it in, and flooded the paddy. Much to their surprise, since they were told wild rice needs flowing water to grow well, the seeds sprouted and produced a crop. They continued to experiment with wild rice throughout the early 1950s and were the first to officially cultivate the previously wild crop. In the United States, the main producers are California and Minnesota (where it is the official state grain), and it is mainly cultivated in paddy fields. In Canada, it is usually harvested from natural bodies of water; the largest producer is Saskatchewan. Wild rice is also produced in Hungary and Australia. In Hungary, cultivation started in 1974 on the rice field of Szarvas. Manchurian wild rice Manchurian wild rice (), gathered from the wild, was once an important grain in ancient China. It is now very rare in the wild, and its use as a grain has completely disappeared in China, though it continues to be cultivated for its stems. The swollen crisp white stems of Manchurian wild rice are grown as a vegetable, popular in East and Southeast Asia. The swelling occurs because of infection with the smut fungus Ustilago esculenta. The fungus prevents the plant from flowering, so the crop is propagated asexually, the infection being passed from mother plant to daughter plant. Harvest must be made between about 120 days and 170 days after planting, after the stem begins to swell, but before the infection reaches its reproductive stage, when the stem will begin to turn black and eventually disintegrate into fungal spores. The vegetable is especially common in China, where it is known as gāosǔn (高筍) or jiāobái (茭白). In Japan it is known as makomodake (:ja:マコモダケ). Other names which may be used in English include coba and water bamboo. Importation of the vegetable to the United States is prohibited in order to protect North American species from