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herbicide for the control of the Tree of heaven (Ailanthus altissima)
Control of the
Tree of Heaven
with a
occurring antagonist
Bernard Blum Award 2019
2nd place
Bernard Blum Award for
Novel Biocontrol Solutions 2019

*Approved as a herbicide (Pfl.Reg.Nr. 4498-0) according to Art. 53 Reg. (EC) 1107/2009 from 04.05.2024 to 31.08.2024 in forests, ornamentals, pomiculture and viticulture and from the 15.04.2024 - 30.06.2024 and the 01.09.2024 - 13.10.2024, respectively, on ways and places, rails and non-crop land.

Use plant protection products safely. Always read the label and product information before use. Observe warning notices and symbols in the instructions for use!
The Tree of Heaven and its natural antagonist
The harmful organism
Ailanthus altissima

Lechner, Y.; Maschek, O.; Kirisits, T.; Halmschlager, E. (2023): Further pathogenicity testing of Verticillium nonalfalfae, a biocontrol agent against the invasive Tree of Heaven (Ailanthus altissima), on non-target tree species in Europe. Phytoparasitica.; 51(1):113-130 FullText

Dauth, B.; Maschek, O.; Steinkellner, S.; Kirisits, T.; Halmschlager, E. (2022): Non-target effects of Verticillium nonalfalfae isolate Vert56 used for biological control of Ailanthus altissima on agricultural crops known to be generally susceptible to Verticillium spp.. BIOL CONTROL.; 174, 10503 FullText

Halmschlager, E; Maschek, O. (2018): Sustainable control of Ailanthus altissima using the bioherbicide „Ailantex“. [Non-native tree species for European forests, Vienna, AUSTRIA, SEPT 12-14, 2018] In: Pötzelsberger, E; Spiecker, H; Hasenauer, H; Konnert, M; Mohren, GMJ; Gazda, A, Non-native tree species for European forests - Experiences, Risks and Oppertunities, Institute of Silviculture, University of Natural Resources and Life Sciences, Vienna, Peter-Jordan-Straße 82, 1190 Vienna

Maschek, O. (2018): Biologische Bekämpfung von Ailanthus altissima mit dem Welkepilz Verticillium nonalfalfae. Dissertation am Inst. f. Forstentomologie, Forstpathologie und Forstschutz, 96; Universität für Bodenkultur Wien

Maschek, O.; Halmschlager, E.: Effects of Verticillium nonalfalfae on Ailanthus altissima and associated indigenous and invasive tree species in eastern Austria. EUR J FOREST RES. 2018; 137(2): 197-209. FullText

Maschek, O.; Halmschlager E. (2017): Biologische Bekämpfung des Götterbaums – realistische Option in naher Zukunft? Natur&Land 3, 32-33.

Maschek, O.; Halmschlager, E.: Natural distribution of Verticillium wilt on invasive Ailanthus altissima in eastern Austria and its potential for biocontrol. FOREST PATHOL. 2017; 47(5): FullText

Maschek, O.; Halmschlager, E.: A rapid, reliable and less-destructive method for stem inoculations on trees. FOREST PATHOL. 2016; 46(2): 171-173. FullText

Maschek, O.; Halmschlager, E.: First Report of Verticillium Wilt on Ailanthus altissima in Europe Caused by Verticillium nonalfalfae. PLANT DIS. 2016; 100(2): 529-529. FullText
Treatment process with a long lasting effect

vor Behandlungsbeginn
before application
nach einem Jahr
after one year
nach sechs Jahren
after six years
Mode of action

The spore suspension is injected into the water transport tissue (xylem, sapwood) of Ailanthus (Tree of Heaven). The fungal spores are distributed in the sap stream. Germinated spores form local mycelium aggregations, which release enzymes and toxins into the water transport tissue. This leads to withering and subsequent decay of the plants. The first symptoms can occur 4 - 6 weeks after inoculation if applied under favourable conditions. For larger trees, the effect is usually only visible the following year.

  • PfeilSelective control of the Tree of Heaven with a naturally occurring antagonist
  • PfeilSustainable control of the root suckers and stump sprouts
  • PfeilNo effects on non target organisms
  • PfeilNatural active substance
Efficacy trials

Effizienz Studie von Ailantex
Result of an efficacy trials of Ailantex against the Tree of Heaven Ailanthus altissima 2020 - 2021
Fields of application

  • PfeilForest
  • PfeilNon-cultivated land, such as railway tracks or areas not used for agricultural purposes (eg. pipeline routes)
  • PfeilOrnamentals plant cultivation, including parks and paths
  • PfeilViticulture
  • PfeilAgriculture

Forst städtischen Bereich Zierpflanzenbau Weinbau
städtischen Bereich städtischen Bereich städtischen Bereich
Zierpflanzenbau städtischen Bereich Nichtkulturland Leitungstrassen
städtischen Bereich Forst städtischen Bereich Leitungstrassen

Application - easy, fast and with a long lasting effect

Ailantex® - das Präparat
The product
Fungal spore suspension with a concentration of 1 x 106 conidia per millilitre. Store away from light in the refrigerator. Use remaining contents quickly.

Tools for application
Ailantex is applied directly into the sapwood of the Tree of Heaven, where it is immediately absorbed by the tree.

Ailantex® - Holzeisen und Holzschlägel
Woodcarving tool or gauge and a wooden mallet
A wooden mallet is used to drive the woodcarving gouge into the sapwood at a shallow angle (15-20° above the horizontal plane) about 1.5 cm into the wood. The blade width and curvature should be adjusted to the tree diameter (e.g. Stubai Hohlbeitel Stich 5, size 10 mm for trees with a diameter at breast height of 1 to 5 cm and size 20 mm for trees with a diameter at breast height larger than 5 cm).

Ailantex® - Pipette
Using a pipette, drip 3 ml into the well of the gouge. The liquid is quickly absorbed by the tree.

Favourable time of application: depending on the climatic zone spring and/ or autumn during the trees vegetative period. The ambient temperature should be below 25°C.

Long lasting effect
The Tree of Heaven is difficult to control due to its stump sprouts and vigorous formation of root runners. Simply cutting the trees without further treatment leads to aggressive new growth. Ailantex however, is transported through the sap stream into neighbouring shoots. Therefore, particularly in dense stands, each shoot need not be treated individually

Ailantex® - Anwendung
Ailantex® - Anwendung
Ailantex® - Anwendung
Ailantex® - Anwendung

Contact and purchase
Kapleigasse 16 • 1110 Wien
Phone: +43 (0)1 769 9 769 • fax: DW 16

Opening hours:
March - September: Monday to Friday: 7.30 - 17.00 Uhr
October - February: Monday to Friday: 8.00 - 16.00 Uhr
International Contact:
Emma Blackwell-Arpaci
Mobil: +43 (0)664 918 92 95

Imprint & Privacy
biohelp - biological plant protection, Nützlingsproduktions-, Handels- und Beratungs-GmbH

Kapleigasse 16
1110 Wien, Austria

Phone: (+43 1) 76 99 769
Fax: (+43 1) 76 99 769 16
E-Mail: office@biohelp.at
Homepage: www.biohelp-profi.at

UID: ATU 575 898 08
FN 243 084b
Company court: Commercial Court Vienna
Managing Director: Dr. Michael Groß (responsible for the content)

Bank details: Volksbank Wien-Baden AG
IBAN: AT37 4300 0303 4246 0000

Disclaimer: No liability can be accepted for the content and information on this website.
The publisher of this website does not identify itself with the contents of external websites (links) and assumes no liability for them. At the time the links to external websites were created, there were no illegal contents on these websites. However, an ongoing review of these links is not possible from an editorial point of view. The link liability according to E-Commerce Law (ECG) Austria applies.

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Data Protection
1. personal data
biohelp - biologischer Pflanzenschutz Nützlingsproduktions-, Handels- und Beratungs-GmbH collects, processes and uses your personal data only with your consent, order or order for the purposes agreed with you, or if there is any other legal basis in accordance with the DSGVO; this in compliance with data protection and civil law provisions. Only such personal data will be collected which are necessary for the execution and processing of our services or which you have voluntarily made available to us. Personal data are in particular data that contain individual details about personal or factual circumstances, such as name, address, e-mail address, telephone number, date of birth, age, gender, social security number.

2. information and deletion
As a customer, business partner or generally as a data subject, you have the right at any time - subject to compliance with any statutory obligation of confidentiality - to obtain information about your stored personal data, its origin and recipient and the purpose of the data processing as well as the right to correction, data transmission, objection, restriction of processing as well as blocking or deletion of incorrect or inadmissibly processed data. Insofar as changes occur to your personal data, you must inform us of these. You have the right to revoke your consent to the use of your personal data at any time. Your request for information, deletion, correction, objection and/or data transmission, in the latter case, provided that this does not cause a disproportionate effort, can be directed to the address stated in point 10 of this declaration or to the biohelp data coordinator. If you are of the opinion that the processing of your personal data by us violates the applicable data protection law or that your data protection claims have been violated in any other way, you have the possibility of complaining to the responsible supervisory authority. In Austria, the data protection authority is responsible for this.

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The protection of your personal data takes place through appropriate organisational and technical precautions. These precautions relate in particular to protection against unauthorised, illegal or accidental access, processing, loss, use and manipulation. Irrespective of our efforts to maintain a reasonably high level of due diligence at all times, it cannot be ruled out that information that you disclose to us via the Internet may be viewed and used by other persons. Please note that we therefore accept no liability whatsoever for the disclosure of information due to errors in data transmission not caused by us and/or unauthorised access by third parties (e.g. hacking of email accounts or telephone, interception of faxes, etc.)

4. use of the data
We will not process the data provided to us for purposes other than those covered by the contract or your order and by your consent or otherwise by any provision in accordance with the DSGVO. Excluded from this is the use for statistical purposes, provided that the data provided has been anonymized. Within the scope of informing our customers, we will only send you e-mails if you have expressly provided us with your e-mail address.

5. transmission of data to third parties
It may also be necessary to pass on your data to third parties in the context of customer service and fulfilment of the purpose of the contract. Your data will be forwarded exclusively on the basis of the DSGVO. Some of the above-mentioned recipients of your personal data are located outside your country or process your personal data there. However, biohelp only transfers your personal data to countries for which the EU Commission has decided that they have an adequate level of data protection and we take measures to ensure that all recipients have an adequate level of data protection, for which we conclude standard contractual clauses (2010/87/EC and/or 2004/915/EC). Your data will not be sold to third parties.

6. disclosure of data breakdowns
We make every effort to ensure that data breakdowns are detected at an early stage and, if necessary, reported immediately to you or the responsible supervisory authority, taking into account the respective data categories affected.

7. storage of data
We will not store data for longer than is necessary to fulfil our contractual or legal obligations, for archiving purposes in the public interest and to ward off any liability claims.

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9. our contact data
The protection of your data is particularly important to us. You can contact us at any time with your questions or revocation using the contact details below.
biohelp - biological plant protection
Nützlingsproduktions-, Handels- und Beratungs-GmbH Postadresse: 1110 Wien, Kapleigasse 16
E-Mail: datenschutz@biohelp.at

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