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Unformatted text preview: How does it apply to Dutch Elm Disease? Sanitation includes insecticidal sprays and the removal of old or weak wood where elm bark beetles breed. Infected trees should be removed from the area to prevent infected through root grafts. DED can be controlled by decreasing the susceptibility of the elm trees in an area by these sanitation practices. 5. (2 pts) In your opinion, what significant consequences resulted from the introduction of Cryphonectria parasitica , the causal organism of Chestnut Blight, into the American forests? The American chestnut has nearly been eliminated from the eastern hardwood forests. Bonus (1 pt): How is hypovirulence utilized as a control of Chestnut Blight? Hypovirulence is the practice of inoculating a lethal canker on a chestnut with a blight fungus that is nonlethal. This practice allows the tree to form bark-callus tissue and heal over the original canker....
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- Spring '08