These are sciarid flies, also known as fungus gnats. The adults are relatively harmless (though annoying), but the grubs feed on the young plant roots and can cause serious damage. The best controls are to drench the pots with PY Insecticide from Vitax or use a Plant Flycatcher sticky trap from Neudorff.
Gardening Expert: |
If you can't find what you are looking for on the website then you can ask one of our experts. To get in touch with us Click Here
We will try to get back to you with an answer as soon as we can.
Did you find this answer useful? Subscribe to our newsletter for gardeing news, projects, special offers and competitions.
Monet's Garden, Giverny
Giverny, France
Aswan Botanical Garden
Aswan, Egypt
Butchart Gardens
British Columbia, Canada
RHS Harlow Carr
Harrogate, United Kingdom
Royal Botanic Gardens Victoria
Melbourne, Australia
Saint Petersburg Botanical Garden
Saint Petersburg, Russia