![]() ![]() ![]() Spray drift occurs when liquid pesticide leaves the intended area. Drift can be in the form of vapor, particles or spray. Pesticide drift is the movement of pesticide off target by wind or air currents. Michigan growers should also familiarize their selves with the Irrigation Generally Accepted Agriculture Management Practices. In Michigan, farmers who chemigate should refer to Michigan State University ( MSU) Extension Bulletin E-2349, “Protect Your Water Supply From Agricultural Chemical Backflow” by Dr. To ensure there is no drift, wind speed and direction needs to be closely monitored and if the wind speed is over five miles per hour chemigation should not be used. When using chemigation growers should apply the minimum amount of water to ensure proper pesticide application, but not too much water where there is potential for runoff or leaching. This is not a common or legal practice since it offers no means of backflow protection. The pesticide must not be injected on the suction side of the pump. Growers who use chemigation need to closely monitor the irrigation system to make sure that all backflow devices are effective and working properly. ![]() The downside of chemigation is the equipment. There is also less damage to the crops caused by machinery and hazards to farmers are reduced. One of the benefits of chemigation is a more uniform application of the pesticide growers should check their irrigation systems uniformity every three to five years. Not all pesticides can legally be applied through chemigation, so farmers need to read the pesticide label carefully. This practice is an excellent means of applying pesticides. There are two other methods of pesticide and water interaction that can cause an effect water quality, chemigation and pesticide drift.Ĭhemigation is the practice of injecting chemicals through irrigation systems. The obvious mode of contamination is direct contact through runoff, leaching or accidental spillage. The movement of pesticides off the target organism can have a tremendous impact on water quality. ![]()
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