Jesse Fulbright, MSU Liberty County Extension
In the throes of winter, we all do our best to winterize and protect our homes, our equipment, and anything else that might suffer from being exposed to the elements. For producers, this includes making sure that pesticides are stored in a secure location where hopefully they won’t freeze.
Always read the pesticide product label to determine whether a pesticide can freeze with no adverse effects. Even if the product seems usable after being frozen, the separation of active ingredients and inert carriers often occurs. A previously frozen pesticide can plug spray equipment, have poor product performance and damage crops if the proper thawing and mixing procedures aren’t followed.Before attempting to thaw a pesticide, the container should be checked to make sure it is not ruptured or cracked from the expansion of the frozen liquid. If the container is cracked, place a waterproof container or bucket under the damaged pesticide product container prior to thawing. If sound, the container should be brought to room temperature by placing the container in a heated room. The thawing process may take several days. Once the liquid has thawed, the container should be agitated by rolling or shaking to return the contents to a uniform suspension. The container should also be inverted several times to ensure the product is completely dissolved. Pesticide manufacturers caution if a pesticide cannot be totally dissolved (crystals are still present) the pesticide should not be used.
In general, pesticides should be stored in a cool, dry location away from extreme temperatures, ignition sources, animals and children. Always store pesticides in their original containers and do not reuse pesticide containers.
For further questions about pesticides and cold weather storage, I would encourage you to visit with your local county Extension office.