Fly and Mosquito Control in Poultry and Livestock Farms
In poultry houses across the Delta, flies multiply quickly in summer because of humidity, wet litter and spilled feed. Flies do not just annoy birds; they carry salmonella and E. coli and cause stress that lowers production. Mosquitoes disturb birds at night and transmit fowl pox in some areas. Owners often resort to spraying a strong insecticide inside the house without calculation, harming birds and eggs and possibly leaving residues in meat. This guide explains how to start with litter and water management, then use the right product at the right time and place.
Why flies build up in poultry houses
A fly needs moist organic matter to lay eggs, and wet litter around feeders and drinkers is the perfect site. Water leaking from drinkers, high humidity and poor ventilation create a damp layer where the fly cycle continues from one week to ten days in hot weather. Spilled feed adds another food source.
Flies do not stay inside the house; they move to the feed store, workers housing and neighbouring homes, then return. Spraying the house alone will not solve the problem if manure heaps or old litter outside are exposed. Real control starts with locating breeding sites, not with counting sprays.
Diseases carried by flies and mosquitoes
Flies carry salmonella, campylobacter and E. coli on their legs and bodies and cause enteritis with diarrhoea, pasted vents and poor feed conversion. They also cause chronic stress because birds spend time repelling flies instead of eating, and flies can carry tapeworm eggs.
Mosquitoes transmit fowl pox, which appears as scabs and blisters on the comb, wattles and around the eye, along with other viruses. Mosquito breeding needs standing water, so any small pool, broken pipe or abandoned container behind the house becomes a source. Removing standing water is cheaper and more effective than any spray.
- Diarrhoea and droppings stuck to the vent.
- Reduced feed intake and growth rate.
- Scabs and blisters on comb and wattles from fowl pox.
- Constant stress, restlessness and poor resting.
- Higher mortality in young chicks.
Litter and water management first
Fix leaking drinkers immediately and adjust their height to bird age to prevent spills. Add fresh dry litter wherever an area becomes wet, and turn the litter daily in hot weather. Provide enough ventilation to remove humidity, because flies do not thrive where litter dries. Remove old litter to a distant covered site and never leave it exposed behind the house.
Manure heaps must be far from the house and covered or composted, because they are the largest fly source. Remove standing water from pits and discarded containers, and repair any leak in farm pipes. These steps alone cut fly numbers substantially before any insecticide is considered and reduce the need for repeated spraying.
Insecticides: type, timing and method
Choose an insecticide registered for poultry farms and read the label for active ingredient, concentration and safety interval. Pyrethroid products such as cypermethrin are used on surfaces and walls, not directly on birds. Spray walls, corners and doors early in the morning or after lights on, and remove birds if the label requires it.
Never mix two insecticides, and never increase the concentration hoping for a better result; overdosing poisons birds and leaves residues. Rotate the active ingredient periodically to prevent resistance. Use a product such as CMOTEX concentrate at a rate calculated by a specialist, and place sticky stations such as CoverBed traps where spraying cannot reach.
Protecting birds, eggs and withdrawal periods
Do not spray during or just before egg collection, and cover eggs, equipment and feed. Let the house ventilate before birds return, and respect the safety interval on the label before selling eggs or birds. In layers, insecticide residues can pass into eggs, so non-chemical methods are preferable near nesting areas.
Insecticides are toxic to bees, fish and cats, so keep them in a locked cabinet away from children and animals. Never reuse empty containers and never dispose of them in canals. Record the date, product and dose, and consult a vet or pest control specialist if mortality or nervous signs appear after spraying. More equipment is available in our poultry supplies and pest control supplies.
Conclusion
Flies and mosquitoes are a management problem before they are an insecticide problem. Dry the litter, fix drinkers and remove standing water and exposed manure, then use a registered product at the correct dose. Birds in a dry, clean house need less spraying and produce better.
This article is general guidance and is not a substitute for examining your animal by a licensed veterinarian. In emergencies, contact your vet immediately.
