Biology 11th Edition by Gerald Audesirk,Teresa Audesirk,Bruce Byers

تمرين 3

Dutch elm disease in the United States is caused by an exotic -that is, an organism (in this case, a fungus) introduced from another part of the world. What damage has this introduction done? What other fungal pests fall into this category? Why are parasitic fungi particularly likely to be transported out of their natural habitat? What can governments do to limit this importation?