Poultry red mite (Dermanyssus gallinae) control with predatory mites (Androlaelaps casalis, Cheyletus eruditus), silica/diatomaceous earth and heat — instead of illegal fipronil and carbamate/pyrethroid sprays

Replaces: fipronil (illegal in food animals), carbamates, organophosphates and pyrethroids in layer houses · Species: poultry · Evidence: medium–high

The chemical problem#

The poultry red mite (Dermanyssus gallinae) hides in cracks and feeds on hens’ blood at night. It causes anaemia, stress, feather pecking, lower egg production and death, and costs the EU industry hundreds of millions of € per year. It also carries pathogens (Salmonella, avian influenza, Erysipelothrix). Because few legal products existed and mites are resistant to pyrethroids and carbamates, some operators used the veterinary drug fipronil, which is forbidden in food-producing animals. This caused the 2017 EU fipronil egg scandal: millions of eggs were recalled across more than 40 countries and hundreds of farms were blocked. OPs and carbamates remain in use in many countries.

Product overview#

Integrated red mite management:

1. Predatory mites: Androlaelaps casalis and Cheyletus eruditus, released from sachets or bulk into cage and aviary structures and hiding places. Sold commercially by EU biocontrol suppliers. Farm trials report substantial reductions in mite populations with regular releases.
2. Silica / diatomaceous earth (DE) and synthetic amorphous silica: dusted or sprayed as a liquid onto perches and cracks. The mites dehydrate. No resistance, and allowed in organic farming.
3. Heat treatment of empty houses (above 45 °C for 48 h or more) between flocks.
4. Plant-derived acaricides (e.g. essential-oil and neem products): partial, with variable evidence.
5. Monitoring with traps (e.g. cardboard/AVIVET traps) for early intervention; house design (fewer hiding places, smooth surfaces).
6. A newer veterinary drug in drinking water (fluralaner, a synthetic isoxazoline with a zero-day egg withdrawal) is available as a legal chemical backup; it is not bio, but far safer than illegal fipronil.

Active ingredient / Composition#

• Predatory mites (for example 50–100 predators per hen per release, repeated; per supplier).
• Silica: amorphous SiO₂ (DE or synthetic).

Key facts#

Advantages#

• No residues in eggs, so no risk of a fipronil-type scandal.
• Works on acaricide-resistant red mites.
• Safe for workers (masks against dust for DE application).
• Suitable for organic and free-range systems.

Mode of action#

• Predators hunt all red mite stages in cracks and hiding places.
• Silica sorbs the mite’s cuticular lipids, so it dehydrates and dies (days).
• Heat kills all stages in empty houses.

Application#

Limitations#

• Predators need an early (preventive) start; they cannot quickly clean up a massive infestation.
• DE dust affects air quality (respiratory health of hens and workers), so prefer liquid formulations.
• Efficacy varies with house design.

Evidence of displacement — D1: works, adoption not proven#

Assessment (hand-reviewed): Generic: biopesticides grew from 1% to ~10% of the global pesticide market (1998–2022).

Figures found (verified as quoted, but the assessment above explains why they do not count as displacement evidence for this substitution):

• displacement — The global biopesticide market share grew from 1% in 1998 to approximately 10% in 2022. (global, 1998-2022; peer-reviewed: mdpi.com)
• displacement — Synthetic acaricides account for approximately 72% of global consumption, while natural or biological acaricides represent around 28% share. (global, not specified; weak: globalmarketstatistics.com)
• performance — Silica-based products are an effective alternative to synthetic acaricides for controlling poultry red mite populations in commercial chicken houses. (Germany, 2020; peer-reviewed: link.springer.com)
• performance — Nearly 55% of commercial farms combine chemical acaricides with biological control methods. (global, not specified; weak: globalmarketstatistics.com)

Suppliers — real products and services (from the vendor index)#

Honest finding: the vendor index has no poultry red-mite biocontrol supplier. This is recorded as a supplier gap.

Companies below are active vendors in the vendor index whose own card (profile / official website) shows this product or service — matched 2026-10-05 by keyword and checked by hand against the card text. Being listed is not an endorsement; open each card for evidence, contacts and status.

Update 2026-10-05: the new Europe dataset adds the closest capabilities — rows marked Europe below; the gap noted above still stands.

Government funding signals#

Public grants for a specific technology are a leading indicator: governments fund what regulators want to replace and what is close to practical adoption. Searched on 2026-09-27 in: EU CORDIS (FP7, Horizon 2020, Horizon Europe), US federal awards (USAspending: USDA NIFA/ARS/APHIS/Forest Service, EPA, DOE, NOAA, USAID; plus NSF and NIH), UK UKRI Gateway to Research, Australian Research Council. Each grant below was reviewed by hand for relevance. China, Brazil and India are covered in the subsection below (publication-acknowledged grants). Not covered: Russia (RSF, FASIE — not reachable from the research environment) and national agencies outside these databases. Amounts are the funder’s contribution as recorded (US NIH/UKRI: per award or fiscal year).

Signal: Moderate. 3 relevant grant(s) · about €1.5M in total · jurisdictions: UK.

China, Brazil, India — national research grants acknowledged in publications#

Chinese, Brazilian and Indian funders have no open grant databases reachable here, so this measures scientific papers published since 2015 that acknowledge national government grants, taken from the grant numbers publishers deposit with Crossref. Only papers whose title contains this article’s key terms are counted (a conservative lower bound; “100+” = search window full). It shows research-funding intensity, not budgets. Funders: China — NSFC, National Key R&D Program, China Agriculture Research System; Brazil — CNPq, CAPES, FAPESP, Embrapa, FAPEMIG; India — DBT, DST, ICAR, SERB, CSIR, BIRAC. Rating per country: Strong ≥50 papers · Moderate 10–49 · Weak 1–9.

Scientific evidence#

• Sparagano OAE, George DR, Harrington DWJ, Giangaspero A (2014). Significance and control of the poultry red mite, Dermanyssus gallinae. Annual Review of Entomology 59: 447–466.
• Lesna I, Wolfs P, Faraji F, et al. (2009). Candidate predators for biological control of the poultry red mite Dermanyssus gallinae. Experimental and Applied Acarology 48: 63–80.
• Kilpinen O, Steenberg T (2009). Inert dusts and their effects on the poultry red mite (Dermanyssus gallinae). Experimental and Applied Acarology 48: 51–62.
• George DR, Finn RD, Graham KM, et al. (2015). Should the poultry red mite Dermanyssus gallinae be of wider concern for veterinary and medical science? Parasites & Vectors 8: 178.

Bioeconomy value#

Predatory mites reared by biological producers, plus a natural fossil silica, replace neurotoxic and illegal acaricides. This protects the trust of the egg chain.