Spring has arrived at your barn—a welcome bit of warmth and renewal, no doubt, after a long winter. Far less welcome is the fly season that will soon follow, with all the associated swishing, twitching and agitation. Insects aren’t just a nuisance, though. They have the potential to transmit disease, stress horses to the point of weight loss and prompt enough foot-stomping to crack hooves and loosen shoes.
Our weapons against these pests are familiar. Year after year we all return to the same time-tested fly control methods—sprays, parasitic wasps and fly masks. Yet results vary. One farm may have a barely noticeable fly population, while another down the road is overrun. The difference, say experts, is not so much in the individual fly control components, but the overall strategy…