CDFA Pest Prevention Plant Regulation Practice Exam

What is persimmon wilt caused by?

1. Fungus

2. Bacteria

3. Virus

4. Mechanical injury

The correct answer is: Fungus

Persimmon wilt is caused by a fungal pathogen, specifically the fungus "Fusarium." This fungus attacks the vascular system of the persimmon trees, leading to wilting symptoms, yellowing of leaves, and ultimately tree decline or death if not managed properly. The identification of Fusarium as the causative agent is critical, as it can help guide appropriate management practices, such as avoiding overhead irrigation that promotes fungal spread and applying fungicides when necessary. Understanding that persimmon wilt is a result of a fungus allows for targeted interventions that can mitigate the impact of this disease, relying on knowledge of the life cycle and conditions favorable for the fungus's growth. This awareness underscores the importance of proper identification in disease management strategies for agricultural practices.