CDFA Pest Prevention Plant Regulation Practice Exam

Which type of tree is more likely to be infected by Dutch elm disease?

1. A. Pine trees

2. B. Elm trees

3. C. Maple trees

4. D. Birch trees

The correct answer is: B. Elm trees

Dutch elm disease is specifically associated with elm trees, which makes them particularly vulnerable to this fungal infection. The disease is caused by the fungus Ophiostoma ulmi, which is spread by elm bark beetles. Elm trees have a unique vascular system that can be blocked by the fungus, leading to wilting and death of the tree. In contrast, pine, maple, and birch trees are not the primary hosts for this disease, and while they may face other types of diseases and pests, they do not have the same susceptibility to Dutch elm disease as elm trees do. Thus, elm trees are the most likely type of tree to be infected by this specific disease, confirming that the answer is indeed elm trees. Understanding the connection between specific diseases and their host trees is crucial for effective pest management and tree conservation efforts.