What is a true statement regarding plant diseases?

The statement that pesticides are labeled for specific pests is correct because pesticide manufacturers conduct extensive research and testing to identify the effectiveness of their products on particular pests. This labeling is crucial for ensuring the safe and effective use of pesticides, as it provides users with the necessary information on which pests the product targets, as well as the recommended application methods and rates. This specificity helps to minimize harm to non-target organisms and the environment, ensuring that the correct product is used for the intended problem.

In contrast, the idea that fungi are responsible for all plant diseases is inaccurate, as plant diseases can arise from a variety of pathogens, including bacteria, viruses, and nematodes, in addition to fungi. The claim that all pesticides are safe for all plants is misleading because different plants can respond differently to specific chemicals, which may lead to harm or phytotoxicity in sensitive species. Lastly, while some plant diseases can be difficult to control, it is not true that they cannot be managed; various cultural, biological, and chemical strategies are available for disease management, providing options for control in many situations.