This guide provides an outline of practices for the management of external arthropod pests such as flies,lice, mites and grubs on organic dairy farms. Left uncontrolled, these pests negatively impact animal health and production. While organic...

, decaying vegetation 20 to 30 days > 20 miles Remarks: Blood feedi ng results in decreased performance production. Foot stomping is good indication of fly presence. Horse fly, Tabanus atratus several species 4, 5 (on front) 1 to 3 years Margins...
species to one year Remarks: Transmit bluetongue and encephalitis; feed in evening and at night. Mosquitoes, Culex spp. 11 7 to 30 days several species Aedes spp. water-filled holes, animal wastes, swamps Stagnant water containing organic matter...

Moore (Organic Dairy Producers, Moore Farms, Nichols, NY) Diane Schivera (Organic Livestock Specialist, Maine Organic Farmer’s and Gardeners Association, ME) Linda Tikofsky (DVM, Quality Milk Productions, Cornell University) *Pesticide Information...
(Dairy Specialist, Cornell Cooperative Extension) Andrew Dunn (DVM, Large Animal Veterinarian, Eastview Veterinary Clinic, Penn Yan, NY) Lisa Engelbert (Organic Dairy Producer and Certifier for Northeast Organic Farming Association of NY). Michael Helms...

The two principal fly pests of confined livestock are house flies and stable flies. House flies, Musca domestica (fig. 1), are non biting insects that breed in animal droppings, manure piles, decaying silage, spilled feed, bedding, and other organic matter...
at each meal. Cows’ stomping of feet is a good indication that stable flies are present because they normally attack legs and bellies (fig. 4). Production performance declines in infested herds because of the painful bites the cows sustain and the animals...