Extension

Pesticides can be valuable tools for managing insects, weeds and diseases in the lawn, landscape and garden. However, because these products are biologically active substances, they must be used, stored and disposed of properly to protect people, pets and the environment.

The best way to avoid having leftover pesticides is to purchase only the amount needed for a specific job. However, it’s not always easy to know exactly how much product will be required. When pesticides do need to be stored, safety should be the top priority.

Because pesticides can be toxic, store them in a dry, locked cabinet that is out of reach of children and pets. Avoid areas where temperatures can exceed 100 F or drop below freezing, as extreme temperatures can affect the effectiveness of some products. Never store pesticides near food, animal feed, medications or other household products.

Always keep pesticides in their original containers with the original labels intact. A readable label provides important information about proper use, storage and disposal. Before returning a pesticide to storage, make sure the container is tightly sealed and check the container for leaks or damage. It’s also a good practice to store herbicides separately from insecticides and other pesticides to help prevent accidental misuse.

Over time, pesticides can undergo chemical changes, particularly when exposed to extreme temperatures or stored for long periods. If an old pesticide is no longer needed or the product is no longer usable, it must be disposed of properly.

Improper disposal can contaminate soil and water and pose a serious risk to people, pets and wildlife. Never pour leftover pesticides into a storm drain, culvert or ditch. These drainage systems can carry chemicals directly into streams, rivers and lakes.

Pesticides should also never be poured down a toilet or sink. Wastewater treatment plants are not designed to remove many pesticide compounds, meaning the chemicals could eventually be discharged into surface water.

The best approach is to plan ahead when purchasing pesticides. Buy only what you need for the job, since disposing of leftover pesticides can be costly. Hazardous waste facilities may accept pesticides, but disposal fees can range from $10 to $100 per pound, depending on the product and facility.

Fortunately, Oklahoma gardeners have another option. The Oklahoma State University Extension Unwanted Pesticide Disposal Program periodically holds free pesticide collection events at locations throughout the state. These events provide an environmentally responsible way for homeowners and agricultural producers to dispose of unwanted pesticides.

Gardeners should watch for announcements about upcoming collection events and check with their local OSU Extension county office to find out if a disposal day is planned nearby.

A little planning when purchasing, storing and disposing of pesticides can go a long way toward protecting your family, pets, wildlife and Oklahoma’s water resources.