Many garden insects are beneficial, but some are bad. No doubt you’ve used a pesticide on occasion to try to prevent a pesky insect from destroying a beloved plant.
But have you ever used a pesticide only to find it didn’t control the pest? You may have attributed it to the weather, applicator error or pest resistance. Or maybe you figured that you simply bought the wrong product. One thing you probably didn’t consider: the pH of the water you used to mix the pesticide. It makes a difference in how effectively the pesticide works.
Most pesticides are sold in concentrated form, and have to be dissolved or suspended in water before they can be applied to plants. The water can come from various sources such as wells, ponds, rivers or municipal water supplies.
Water naturally varies in the number of dissolved minerals, organic matter and pH, depending on its source. The pH of water from natural sources can vary throughout the season.
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