Why should pruning and grafting tools be sterilized to reduce plant disease?

Sterilizing pruning and grafting tools is a critical practice in plant pathology because it prevents the mechanical transmission of pathogens between plants. When tools are used on an infected plant, they can become contaminated with bacteria, fungi, or viruses. If these tools are not disinfected before being used on healthy plants, they act as vectors, introducing the inoculum directly into healthy tissue and spreading the disease throughout a garden or orchard.1

Disinfection is a key component of disease eradication, which focuses on eliminating disease agents after they have established themselves. By regularly cleaning and sterilizing equipment, growers effectively break the cycle of infection, ensuring that pruning and other maintenance activities do not inadvertently contribute to the spread of harmful pathogens.1