Linda from St Cloud, Fl writes
For fly control on horses, Martin's Permethrin 13.3% is mixed at 8 fl oz per 66.5 gallons of water to treat the entire animal. For spot treatment application, the mix rate is 2 fl oz in 1.33 gallons of water or 16 fl oz in 3.3 gallons of water. Apply at as a low pressure spray using ½ oz per ear or 2 to 4 oz on face or 12 to 16 oz along the backline. Please refere to the mix rate table for Pests On Large Animals on page 13 of the product label for more information.
Answer last updated on: 04/23/2021