What is a key strategy in managing viral plant diseases?

Using resistant plant varieties is a highly effective strategy in managing viral plant diseases. This approach involves the selection and cultivation of plant species or cultivars that have been genetically modified or bred to resist particular viruses. Such resistance can significantly reduce the incidence of disease and its associated impacts on crop yields and quality.

By employing resistant varieties, growers can minimize the need for chemical interventions and other management practices that may be less environmentally friendly or more labor-intensive. Additionally, these resistant plants can help in breaking disease cycles and reducing the overall spread of viruses within a growing area.

In contrast, increasing pesticide usage may not effectively target viral diseases, as many typical pesticides are designed to combat fungal or insect problems rather than viruses. Limiting water availability does not directly address the problem of viral infections and may stress plants, making them more susceptible to disease. Similarly, maximizing sunlight exposure is essential for plant health and growth but does not specifically mitigate the effects of viral infections.