Who likes pests on their plants? On the other hand, it is hopefully also important to you not to use any chemicals when gardening. How do you get rid of the fungus gnat anyway? Sand is a good alternative to pesticides. On the one hand, it is inexpensive and, on the other hand, neither the plants nor the pests are harmed. Read how to do it here.
A layer of sand prevents fungus gnats from entering the soil
How does sand control work?
Repelling fungus gnats with sand is very simple. All you need is coarse sand, which you can find anywhere in nature or on the construction yard. If the mixture contains gravel or small stones, it doesn't bother at all. Apply a layer of sand to your plant substrate. Really every spot should be covered to prevent the pests from gaining access to the potting soil.
Consequences for the fungus gnat
Like all pests, the fungus gnat has certain preferences that make it multiply at lightning speed. Moist soil in particular plays into the hands of the pests. Potting soil stores water well and should therefore be covered with a layer of sand. If you dry the substrate surface in this way, the adult females will look for another location to lay their eggs. The best thing about this method is that it won't damage your plants or kill the fungus gnats in the process. The pests are only driven away.
Why take action against the brood?
Most gardeners fear the adult parasites. In the case of the fungus gnat, however, these are only annoying, but harmless to your plant. They only feed on dead plant parts. In addition, they only have a life expectancy of a few days when fully grown. The larvae, on the other hand, suck the sugar from the leaves, causing them to die over time. By preventing breeding in the potting soil with sand, once the existing generation dies, no more will follow. Here is an overview of the life cycle of the fungus gnat:
- Eggs, brood hatch after about 5 days
- Larva, goes through different stages within two weeks
- Pupa, for about seven days
- Adult fungus gnat, lays eggs, dies after a week