Featured Article | GreenCast | Syngenta

Take Control of Fungus Gnats & Shore Flies

Fungus gnats and shore flies can quickly build up in the greenhouse during spring production. Warm, wet conditions favor their development and with their short life cycle, it doesn’t take long for populations to increase. While adult fungus gnats are primarily a nuisance, the larvae feed on plant roots and stems, allowing soil-borne pathogens to enter and cause disease. Shore flies (adults and larvae) don’t typically feed on plant tissue – instead favoring algae or decaying organic matter – but the adult fly is known to effectively vector several soilborne pathogens, such as Thielaviopsis, Fusarium and Pythium spp.

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Shore fly, Nancy Rechcigl, Syngenta
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Fungus gnat, Jim Baker, North Carolina State University, Bugwood.org


Pest Lifecycles Disrupted
Citation® insect growth regulator (IGR) can help control fungus gnats, shore flies and dipterous leafminers by preventing them from reproducing. As an IGR, Citation:
  • Disrupts normal larva growth and development
  • Interferes with the formation and release of essential insect molting hormones
  • Breaks pests’ lifecycles so they are unable to advance to the next stage of development and subsequently die


​​​​​​​Citation is an effective option for use in an integrated pest management program. It has proven to be compatible with many beneficial insects and can be applied during plant propagation. There has also been no phytotoxicity observed at labeled rates.

Rates & Expanded Label
Apply Citation at 2.66 oz./A as a heavy spray or drench to all surfaces where insects may breed. This includes pots, bench tops, undersides of benches, and the areas under benches that may be contaminated with potting media or algae. Repeat applications as needed on a 7-14-day interval to maintain control.

Citation is now labeled for use on the following vegetable crops grown for transplant:
  • Brassica/Cole
  • Bulb Crops
  • Cucurbits
  • Peppers
  • Tomatoes
  • Leafy Vegetables


Visit www.GreenCastOnline.com/Citation and download the sell sheet to learn more.


​​​​​​​All photos are the property of Syngenta or are used with permission.

©2019 Syngenta. Important: Always read and follow label instructions. Some products may not be registered for sale or use in all states or counties and/or may have state-specific use requirements. Please check with your local extension service to ensure registration status and proper use. Citation®, GreenCast® and the Syngenta logo are trademarks of a Syngenta Group Company.