Biological Fly Control and Manure Management



Q: What are the advantages of using bait trapping methods along with fly exterminators?
A:Bait trapping is highly recommended to accompany fly parasite releases for adult flies. Using some non-poisonous materials or chemicals can be useful when they are made into sugar baits and fed to the adult flies. It is both economical and safe to use bait traps to kill large numbers of adult flies without interfering with biological controls. In order to lessen the fly problems during the first few weeks of summer it is important to lower the adult fly density before seasonal hot weather arrives and also during the period of time it takes for the beneficials to reproduce to larger numbers in the manure. In areas with humid weather and wet manure accumulations both releases of parasites and bait stations are needed to give excellent fly management. Inside each barn or shady area one bait trap should be set up when you start releasing parasites. The number of traps should be increased along with parasite releases until the adult flies are gone.

Q: What are the advantages of using bait trapping methods along with fly exterminators?
A:In order to have a successful integrated fly control program it is imperative to keep the number of adult flies down because a single fly can lay up to 800 eggs and a single parasite will attack less than 50 fly pupae developing from all those fly eggs. An advantage the flies have is that they have a shorter life cycle (8 days in hot weather and up to 14 days in moderate weather), giving greater reproductive capability and are capable of traveling greater distances. Flies tend to resist the effect of pesticides more than the parasites do because the population of fly parasites need continuous reinforcement through augmentative releases of parasites to maintain a high level of fly control.

Q: Will removing manure from my pasture or barn help to control fly populations?
A:In order to help limit fly problems it is imperative to practice good sanitation which will then eliminate the conditions which are favorable to fly breeding. Removing manure frequently reduces fly parasite breeding areas. While leaving a little of the top layer of manure in place in order to leave some of the complete complex of beneficials to keep destroying the flies. Keep manure dry and eliminate wet areas where possible while maintaining ventilation. Clean up feed spills where possible. Use hydrated lime where animals urinate frequently. In cases where there are large amounts of manure, the manure can be managed in a pond or a storage area where non-aerobic digestion is accomplished or by aerobic composting systems. Manure which is unprocessed can be piled and covered which will reduce the surface and heat built up to reduce fly breeding. Dry manure does not breed flies, but a moisture content of 50% to 80% is where fly breeding occurs and is also where the fly parasites work best.