Fungus gnats are one of the most common indoor plant pests, and in this episode Dr Ian Smith explains what we need to know about them as horticulturists.What threat do they pose our plants? When should we do something about them? What methods can we use to reduce numbers, or remove them completely (with and without chemicals)? Follow Ian on Twitter: @EcologianFollow the Plants Grow Here podcast on Twitter: @PlantsGrowHereTweet insects you'd like to hear about: #PGHBugsTheme music: https://www.youtube.com/watch?v=b5lVBxhSw5k