Which of the following describes a primary benefit of starting with disease-free plants?

Starting with disease-free plants is crucial for planting success and overall crop health. The primary benefit of using disease-free plants lies in the significant reduction in the risk of disease spread. When plants are free from pathogens, the likelihood of introducing diseases to the growing environment is minimized, which helps maintain a healthy plant population. This proactive approach can lead to better yields, as plants will be less stressed and more capable of thriving.

In contrast, while soil erosion and water retention are important factors in horticulture and agriculture, they are not directly related to the initial health status of the plants being used. Also, beginning with healthy plants typically reduces the need for chemical treatments rather than increasing them, as healthy plants are less susceptible to diseases and pests that often require chemical intervention.