Wettable powders, water dispersible granules, and dry flowables: add 1 tablespoon for each pound per 100 gallons of final spray mixture. Types of compatibility agent products include Blendex® and Unite®.ģ. Compatibility agents are adjuvants used to reduce incompatibility (lack of mixing) of pesticides or pesticide and liquid fertilizer mixtures. Add ¼ teaspoon of compatibility agent to one jar, but not the second jar (equivalent to 2 pints per 100 gallons of spray solution). Measure 1 pint of carrier (water or liquid fertilizer) to each of 2 quart jars.Ģ. When performing compatibility tests, remember you must wear the personal protective equipment listed on the most restrictive label.ġ. By using two jars for mixing various pesticides and fertilizers, you can determine compatibility before you tank mix. Impurities in your spray tank, the order in which you mixed the pesticides, the types of formulations being mixed water temperature, and the amount of time the mixture has sat in the tank are reasons for incompatibility to occur.Ī sure way to insure the formulations you are mixing are compatible is to use a standard 2-jar compatibility test. When a solution is incompatible it will clog nozzle heads, limit distribution uniformity of the active ingredient, costing you valuable time and money. Another symptom of incompatible solutions will be heat generating from the mixture. Incompatible solutions will end up with flakes, crystals, oily clumps or noticeable separation. When pesticides don’t mix together properly or will not form a uniform solution the formulations you have combined are considered incompatible. So how do you know if the pesticide formulations you want to mix are compatible or not? If this is the case you must take precautions as pesticide label compatibility charts usually refer to only two pesticide active ingredients. There may be times when you want to mix more than two active ingredients or confirm that two different inert ingredients such as emulsifiers and wetting agents will mix properly. So read the label after all it is the law! However, unless expressly prohibited by a pesticide’s label, mixing is legal. You can find this information on the label in what is called a pesticide label compatibility chart. When choosing to tank-mix various chemicals, the applicator should always be aware of which pesticides can and can’t be mixed. However if you mix with Improper combinations you can cause phytotoxicity to crops or ornamental plants, damage equipment and in the long run spend more money. Tank mixes save time, labor, money, equipment wear, and crop damage. ![]() Sometimes you may want to mix a pesticide with fertilizer, or mix two herbicides together to increase weed control. ![]() Tanks mixes can consist of a fungicide and an insecticide to control both a fungus and insects at the same time. When you do combine ingredients you are creating what is known as a tank mix. There may be a time when you want to combine and apply two or more pesticides plus fertilizer for either convenience, to save money, or to reduce equipment wear.
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