CDFA Pest Prevention Plant Regulation Practice Exam

Quick decline of citrus is classified as which type of disease?

1. Parasite

2. Fungus disease

3. Virus disease

4. Bacterial disease

The correct answer is: Virus disease

Quick decline of citrus is classified as a virus disease. This classification is based on the specific nature of the pathogens that cause quick decline, which involve viral agents. In particular, the symptoms associated with quick decline can be linked to the presence of certain viruses that infect citrus plants, leading to rapid deterioration of the tree's health and productivity. Virus diseases typically affect the cellular processes of plants, leading to stunted growth, yellowing of leaves, and reduced fruit quality. Quick decline specifically manifests as a sudden drop in tree vigor and can result in severe economic losses for citrus growers. Unlike other pathogenic classes, such as fungi or bacteria, virus diseases require specific understanding of transmission vectors, often involving insect pests that spread the viral particles. This understanding of the viral nature of quick decline is crucial for developing effective management strategies, as it can help in the implementation of preventative measures against vectors and in the choice of resistant plant varieties.