CDFA Pest Prevention Plant Regulation Practice Exam

Pear-juniper rust is classified as which type of disease?

1. Bacterial disease

2. Virus disease

3. Fungus disease

4. Parasite

The correct answer is: Fungus disease

Pear-juniper rust is classified as a fungal disease. This classification stems from the pathogen responsible for the disease, which is a type of fungus belonging to the genus Gymnosporangium. Fungal diseases are caused by organisms that reproduce through spores and can affect a wide range of plant species, often leading to symptoms such as leaf spots, wilting, and other forms of tissue damage. In this case, pear-juniper rust specifically affects pear trees and juniper shrubs, demonstrating the life cycle known as a heteroecious rust, where the fungus requires two different host plants to complete its lifecycle. Understanding the nature of such diseases is crucial for effective management and control strategies in agricultural practices. Recognizing pear-juniper rust as a fungal disease helps in applying the appropriate fungicides and cultural practices to mitigate its impact during the growing season.