Disinfecting Tools, Equipment, Pots, Flats and Benches

Disinfectants are used to decontaminate equipment surfaces or plant surfaces. First, prewash tools, equipment, pots, flats, and benches to remove soil and plant debris because disinfectants do not penetrate these well. Once cleaned, disinfect equipment with a method or material noted in the table below. Finally, store clean, dry tools on clean newspaper or plastic sheeting or in an empty, clean container. Or you can hang them up, so they do not become contaminated with soil or plant debris.

A non-chemical method of disinfectation is the use of steam or dry heat.  This method is used to disinfect potting soil and reused materials like pots, flats, or other containers. 

Several chemicals can be used to disinfect surfaces. Most of the materials listed below are registered as pesticides with the EPA. Follow the instructions on the label of disinfectants; the label will explain the methods of product application, the time required for the product to disinfect, and any personal protective equipment (PPE) requirements.  Also, read the label to determine if the products should be rinsed with clear water following treatment.  After treatment, allow the equipment to air dry. 

Here are a few more tips:

• Do not walk on greenhouse potting soil, benches, or equipment that must be kept free of soilborne plant pathogens unless your shoes have been dipped in disinfectant, covered with sterile booties, or wrapped in clean plastic.
• When using pruning tools, disinfectants can be carried in a squeeze or spray bottle or poured into dipping cups. Thoroughly wet the tool’s cutting surfaces with the disinfectant, then allow the tool to drain and air dry. If sap or resin builds up on the tool, scrub this off with a rag that is kept in the disinfectant. Then dip, pour, or spray more disinfectant onto the tool. Let it drain and air dry, or let it soak in the disinfectant for the time specified on the label. When pruning specifically to remove diseased plant parts, it is best to alternately use two tools so that one can soak in disinfectant while the second is in use.