乳浆大戟是北美草原上的一种多年生杂草,在美国常年造成5千万美元的经济损失,对其进行化学防治既不经济又相当困难,经接种试验,交链孢真菌可用于防治乳浆大戟,该菌对乳浆大戟以外的植物,要在较长的露湿期才能侵染。经毒素的生物测定,交链孢真菌能产生毒素已得到初步测定。 Millettia Euphorbia is a perennial weed in the North American grasslands, causing perennial US $ 50 million economic losses in the United States, its chemical control is not economical and very difficult, after inoculation test, Alternaria fungus can be used for control Whey Euphorbia, the bacteria on the Euphorbia cream outside the plant, to be exposed to a longer dew wet. Biological determination of toxins, Alternaria fungus can produce toxins have been initially determined.