CDFA Pest Prevention Plant Regulation Practice Exam

Which organism is responsible for causing Ozonium root rot?

1. A. virus

2. B. bacteria

3. C. fungus

4. D. nematode

The correct answer is: C. fungus

Ozonium root rot is primarily caused by a specific type of fungus known as Ozonium. This organism infects the roots of various plants, leading to significant damage and often resulting in poor plant health or death if left untreated. Fungal pathogens like Ozonium thrive in wet or poorly drained soils, which enhances their ability to attack the root systems of susceptible plants. The presence of this fungus can disrupt the plant's ability to absorb water and nutrients, leading to symptoms such as wilting, yellowing of leaves, and ultimately root decay. Understanding that Ozonium is a fungus highlights the importance of proper soil management and plant care practices in preventing root rot diseases.