June is traditionally a big spray month. When it comes to spraying, one of the major concerns is spray drift. The chemicals moving to off target location. Besides wind, the biggest contributor to spray drift is inversions. An inversion is when the lowest levels of the atmosphere are cooler than the air above it. Meaning, if you spray into the inversion, the colder air near the surface tends to hinder the spray particles from reaching the plants. Instead, the tendency is for the spray particles to move horizontally. This is why it is a violation of label instructions to spray when an inversion is present. Download the NDAWN inversion app and you’ll know when inversions are present.