Forest defoliator control (Siberian silk moth, spongy/gypsy moth, nun moth, pine moths) with Bt kurstaki, nucleopolyhedrovirus (NPV) and pheromone mating disruption — instead of aerial chemical insecticides
Aerial spraying of pyrethroids (cypermethrin, deltamethrin), organophosphates, and chitin-synthesis inhibitors (diflubenzuron) over forests
Boreal and temperate forests; Siberia and Far East (Siberian silk moth Dendrolimus sibiricus), European Russia (spongy moth Lymantria dispar, nun moth L. monacha), pine forests (pine beauty, pine looper)
Suppliers 2
| Andermatt Group | Switzerland | active |
| Biochemtech SRL | Moldova | active |
Route into Russia / EAEU PEST
- Regulator
- Ministry of Agriculture (Minselkhoz)
- Typical time
- 2-3 years (registration trials over seasons)
- Legal basis
- Federal Law 109-FZ (19.07.1997); registration trials, expert assessment, entry in the State Catalogue of pesticides and agrochemicals permitted in the RF; microbial and viral biopesticides are pesticides (EEC)
Information, not legal advice — confirm the procedure for your product.
Proof 4 claims
Synthetic chemical insecticides (e.g., organophosphates like Fenitrothion).
Bacillus thuringiensis (Bt) based biopesticides (e.g., Btk) applied via aerial spraying.
- Displaced at scale?
- yes
- Caveats
- While Bt has largely replaced synthetic insecticides for certain lepidopteran defoliators in Canada and parts of Europe, this displacement is not universal. Baculoviruses remain niche due to high production costs, lack of sustained demand, and regulatory hurdles. Furthermore, effective biological agents for sawfly pests are largely lacking, leading to continued reliance on chemical insecticides in some regions.
- Hand review
- D3 National: Bt products replaced synthetic insecticides in Canada's spruce budworm programmes (1985–1990).
- checked
- 2026-10-06
| Between 1985 and 1990, Bacillus thuringiensis products gradually replaced synthetic insecticides in spruce budworm control programmes across Canada. “As a result, between 1985 and 1990 B. thuringiensis products gradually replaced synthetic insecticides in spruce budworm control programmes across Canada (van Frankenhuyzen 2000) .” Canada · 1985-1990 · large measured reduction of the old process | peer-reviewed ✓ exa.ai |
| The development of products based on Bacillus thuringiensis Berliner has almost entirely replaced synthetic insecticides in forest protection in Canada. “The second success was the development of products based on Bacillus thuringiensis Berliner (Bacillaceae), which have almost entirely replaced synthetic insecticides in forest protection.” Canada · 2015 · large measured reduction of the old process | peer-reviewed exa.ai |
| Applying Btk every 2 years is the most profitable approach to protect forest against spruce budworm and has a lower operational cost compared to standard and intensive scenarios. “Consequently, applying Btk every 2 years is not only the most profitable approach to protect forest against spruce budworm but also its lower operational cost as compared with the two aforementioned scenarios would allow to protect additional area without the need to increase the budget allocated to forest protection.” Canada (Quebec) · 2010-2021 · | peer-reviewed annforsci.biomedcentral.com |
| Public opposition to large-scale aerial application of chemical insecticides contributed to the adoption of B. thuringiensis in Canadian forestry. “The adoption of B. thuringiensis in the context of public opposition to large-scale aerial application of chemical insecticides no doubt contributes to this acceptance.” Canada · 2015 · | peer-reviewed exa.ai |
References 4
- van Frankenhuyzen K (2000). Application of *Bacillus thuringiensis* in forestry. In: Charles JF, Delécluse A, Nielsen-LeRoux C (eds) *Entomopathogenic Bacteria: NOT CHECKED — regulation …
- Tobin PC, Blackburn LM (eds) (2007). *Slow the Spread: A National Program to Manage the Gypsy Moth*. USDA Forest Service General Technical Report NRS-6. NOT CHECKED — regulation …
- Moscardi F (1999). Assessment of the application of baculoviruses for control of Lepidoptera. *Annual Review of Entomology* 44: 257–289. VERIFIED DOI · cited by 650
- Kharuk VI, Im ST, Ranson KJ, Yagunov MN (2017). Climate-induced northerly expansion of Siberian silkmoth range. *Forests* 8: 301. VERIFIED DOI · cited by 39
Details
Replaces: aerial chemical insecticides over forests · Scope: forest protection · Evidence: high
The chemical problem#
Outbreaks of defoliating caterpillars can strip millions of hectares. The Siberian silk moth outbreaks in Krasnoyarsk, Tomsk, Irkutsk and Yakutia have killed dark-coniferous taiga over huge areas, and are expanding north with warming. Aerial spraying with pyrethroids or diflubenzuron over forests and streams kills non-target insects, and the parasitoids and diseases that naturally collapse outbreaks.
Product overview#
- Bacillus thuringiensis subsp. kurstaki (Btk): Foray and DiPel (worldwide); Lepidocid and other domestic Btk products (Russia). It is the main forest insecticide in Canada (spruce budworm) and the USA, and is used in Russian forest protection against the Siberian silk moth. It is selective to caterpillars.
- Species-specific nucleopolyhedroviruses (NPV): Gypchek (spongy moth NPV, US Forest Service), TM-Biocontrol-1 (Douglas-fir tussock moth), Virin-series NPV preparations (Russia, historical). They are highly specific and self-spreading, and trigger the natural epizootics that end outbreaks.
- Mating disruption and pheromone monitoring: the US “Slow the Spread” program uses aerial pheromone flakes (disparlure) and monitoring on millions of hectares to slow the spongy moth’s invasion front.
- Silvicultural measures: mixed-species stands, monitoring (pheromone traps, egg-mass counts), early detection by satellite, and conservation of parasitoids and birds.
Active ingredient / Composition#
Btk spores + Cry1 crystals (aerial ULV formulations, e.g. about 20–30 BIU/ha); NPV occlusion bodies; disparlure dispensers/flakes.
Key facts#
| Parameter | Value |
|---|---|
| Class | Microbial insecticides + semiochemicals |
| Group code | IRAC 11A (Btk), 31 (NPV) |
| Application | Aircraft/drones at the young-larva stage (L2–L3) |
| Non-target | Btk: Lepidoptera only; NPV: single host genus |
Advantages#
- Spares bees, aquatic insects, birds and most natural enemies.
- NPVs and conserved parasitoids shorten outbreaks naturally.
- Russia can produce Btk and NPV at domestic biofactories.
Mode of action#
Btk: Cry toxins make pores in the larval gut. NPV: the virus replicates systemically and dead larvae spread new virus. Pheromones: males cannot locate females.
Application#
| Pest | Measure | Specifics |
|---|---|---|
| Siberian silk moth | Aerial Btk at young larvae; monitoring via pheromone traps and satellite damage maps | Timing with the 2–3-year life cycle; remote areas need aircraft |
| Spongy moth | Btk or Gypchek; mating disruption at the invasion front | Egg-mass surveys |
| Nun moth, pine moths | Btk; pheromone monitoring | – |
Limitations#
- Timing and weather matter; Btk has a short residual.
- NPV production is small-scale (produced in living larvae).
- In remote taiga, the logistics limit any treatment.
Evidence of displacement — D3: proven displacement at scale#
Assessment (hand-reviewed): National: Bt products replaced synthetic insecticides in Canada’s spruce budworm programmes (1985–1990).
Verified figures (the number is in the quoted sentence and the sentence is on the source page):
- displacement — Between 1985 and 1990, Bacillus thuringiensis products gradually replaced synthetic insecticides in spruce budworm control programmes across Canada. (Canada, 1985-1990; peer-reviewed: exa.ai)
Suppliers — real products and services (from the vendor index)#
Honest finding: the vendor index has no forest-defoliator biocontrol or pheromone 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.
| Company | Region · Country | What the index shows | Card |
|---|---|---|---|
| Andermatt Group | Europe · Switzerland | baculovirus bioinsecticides, microbials and pheromone traps (forest use not stated) | card |
| Biochemtech SRL | Europe · Moldova | Insecto™ pheromone traps and semiochemicals for agricultural and forest pests (target species not stated on the card) | card |
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: Strong. 2 relevant grant(s) · about €32.8M in total · jurisdictions: USA.
| Funder / programme | Project | Lead organisation | Start | Amount | Link |
|---|---|---|---|---|---|
| US federal — Forest Service | Gypsy moth slow the spread trapping & treatment program | Gypsy Moth Slow The Spread Foundation Inc (US) | 2015 | 19,418,039 USD | link |
| US federal — Forest Service | Gypsy moth slow the spread | Gypsy Moth Slow The Spread Foundation Inc (US) | 2009 | 16,278,203 USD | link |
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.
| Country | Papers funded (2015–2026) | Signal | Main funders (grant acknowledgements) | Example grant → funded paper |
|---|---|---|---|---|
| China | 45 | Moderate | NSFC (50), National Key R&D Program (6) | NSFC 31770687 → Effects of Rearing Density on Developmental Traits of Two Different Biotypes of the Gypsy Moth, Lymantria… (2021) doi |
| Brazil | 0 | None | – | – |
| India | 0 | None | – | – |
Scientific evidence#
- van Frankenhuyzen K (2000). Application of Bacillus thuringiensis in forestry. In: Charles JF, Delécluse A, Nielsen-LeRoux C (eds) Entomopathogenic Bacteria: From Laboratory to Field Application. Kluwer, Dordrecht.
- Tobin PC, Blackburn LM (eds) (2007). Slow the Spread: A National Program to Manage the Gypsy Moth. USDA Forest Service General Technical Report NRS-6.
- Moscardi F (1999). Assessment of the application of baculoviruses for control of Lepidoptera. Annual Review of Entomology 44: 257–289.
- Kharuk VI, Im ST, Ranson KJ, Yagunov MN (2017). Climate-induced northerly expansion of Siberian silkmoth range. Forests 8: 301.
Bioeconomy value#
Microbes and pheromones protect forest carbon stocks and timber without contaminating forest ecosystems.