Maxiban™ (narasin and nicarbazin)

A combination product for coccidiosis prevention in broilers

Monteban™ (narasin)

A great finish for broiler chickens
Poultry Hemicell

Hemicell™ (β-Mannanase)

An energy sparing enzyme
Poultry Hemicell™ Supreme

Hemicell™ Supreme (β-mannanase)

An Energy Sparing Enzyme

Rumensin™ (monensin as sodium monensin)

Prevent coccidiosis in broilers and layer replacement pullets
Poultry Flubenol

Flubenol™ (flubendazole)

The broad spectrum wormer for poultry
Poultry Larvadex

Larvadex™ (cyromazine)

Long-acting fly control in poultry production


Customised in-feed probiotic solution

Larvadex™ (cyromazine)
Larvadex™ (cyromazine)

Long-acting fly control in poultry production

Larvadex™ 1% is an insect growth regulator which controls larvae of nuisance flies in poultry manure. Treatment is commenced in the feed when fly activity is noticed, and continued for 4-6 weeks or until the fly population is under control. This action of larval control enables a reduction in insecticide application frequency and costs. When used as directed, Larvadex™ has no adverse effects on beneficial manure-inhabiting insects which prey on fly eggs and larvae1.

When blended into a poultry ration, according to the Directions for Use, Larvadex™ 1% Premix controls certain fly species' maggot development in poultry manure. This disruption of the fly's life cycle, and reduction of the fly population over time is an effective way to achieve control of flies in poultry houses. Since Larvadex affects the moulting process of fly larvae2, an adulticide product is recommended for use between Larvadex treatments.

Important Safety Information

Always read and follow the label directions.

Withholding Period

If manure from poultry fed Larvadex™ is applied to land that is used for growing food crops, particularly grain, finite crop residues may occur. To avoid illegal residues:

  • DO NOT apply manure to soil at rates > 4 dry tonnes/ha/yr.
  • If supplying manure to a third party, ensure that they are made aware of this restraint.

Directions For Use

Larvadex™ affects the moulting process of fly larvae. It does not kill adult flies. The elimination of adult flies is therefore gradual.

Situation Insect Rate Comments
Poultry housing, for broilers, breeders and layers. Flies 500 g of Larvadex 1% premix per tonne of normal poultry feed.
  1. DO NOT add Larvadex™ 1% Premix directly to the feed. Use a mixing process which will ensure that the product is evenly distributed through the feed.
  2. Commence treatment when fly activity is noticed. Continue for 4 to 6 weeks or until the fly population is under control. Revert to untreated feed until the flies build up again, when use of treated feed should be resumed.
  3. Any spillage of premix or of feed mixed with the premix should be cleaned up immediately, preferably by recovery and use in or as poultry feed.
  4. The use of an adulticide is recommended between Larvadex™ treatments. DO NOT apply adulticides directly onto manure as they may harm beneficial insects that breed in the manure.

Elanco recommends that Larvadex™ be used as part of an integrated fly control program.
Integrated fly control involves sanitary and management practices to compliment chemical control methods consisting of adulticides and larvicides. The following practices help eliminate potential fly breeding sites:

  • promptly remove broken eggs and dead birds
  • repair leaks that contribute to wet manure (undesirable odour and an ideal breeding site for flies). Larvadex™ encourages manure drying.
  • reduce feed spills in manure pits and clean up feed spills and manure spills, especially if wet.
  • ensure good shed ventilation to reduce moisture in manure in the pits.
  • ensure good site drainage to avoid ground moisture "wicking" into manure cones.
  • ensure any other fly-infested animal operations in close proximity to the poultry operation do not act as a source of invading flies.
  • DO NOT spray non-specific insecticides onto manure as this may inhibit biological control.
  • In certain situations, retention of a dry manure pad (~20 cm high) following clean out of layer sheds will give superior fly control by 1) providing a suitable habitat for beneficial, manure-inhabiting predatory insects and mites that eat fly eggs and larva and 2) facilitating drying of additional manure strata.


1 Axtell, R.C & Edwards, T.D. 1983. "Efficacy and Nontarget Effects of Larvadex™ as a Feed Additive for Controlling House Flies in Caged-Layer Poultry Manure". Poultry Science 62:2371-2377

2 Paige, John & Lindauer, Kristin. 1992. “Technical Summary, Larvadex” Pg.1-94

Registered pursuant to the ACVM Act 1997, No. P003267.
See for registration conditions