May 25, 2017

Oxalic Acid Registered for Varroa Control

Click here to read the oxalic acid label. The toxicity of oxalic acid (OA) to Varroa has been known for nearly three decades based on experiments conducted in Asia and later in Europe. The initial tests compared spraying weak OA solutions on bees, trickling OA sugar syrups into honey bee colonies and OA fumigation (vaporization). All of these methods demonstrated very high efficacy and were … [Read more...]