Structural Pest Control Applicator Practice Exam

Which of the organisms are associated with plant disease?

1. Bacteria and viruses.

2. Amoebas and algae.

3. Fungi and nematodes.

4. a and c.

The correct answer is: a and c.

Organisms associated with plant diseases include various types of pathogens that can infect and harm plants. Bacteria can cause a range of plant diseases, leading to symptoms such as wilting, leaf spots, and rotting. Viruses, which are smaller infectious agents, can invade plant cells and disrupt normal growth and development, resulting in stunted growth or other visual symptoms. Fungi are another major group of pathogens responsible for many plant diseases. They can lead to issues such as blight, rust, and mildew in plants. Nematodes, which are microscopic roundworms, also play a significant role in plant disease; they can invade plant roots and cause root galls, stunted growth, and other damage. Thus, the correct response combines both groups of organisms, as bacteria and viruses as well as fungi and nematodes are significant contributors to plant disease. This makes the option that includes both sets—bacteria and viruses along with fungi and nematodes—the most comprehensive choice.