Why does your Dendrobium kingianum have tiny black flies? Diagnose the cause and fix it with our step-by-step guide.
Pet FriendlyThe presence of tiny black flies in an orchid medium is almost always due to fungus gnats, which lay eggs in moist organic matter. Their larvae feed on decomposing bark and can damage the delicate root hairs of your Dendrobium kingianum.
Dendrobium kingianum is an epiphyte that requires rapid drying between waterings; constant moisture attracts pests and provides a breeding ground for larvae. Wetting the bark/moss too frequently prevents oxygen from reaching the roots, creating the perfect habitat for flies.
As orchid bark breaks down into fine, compost-like material, it creates a nutrient-rich environment for flies. If the potting medium is old, it becomes a permanent reservoir for insect life cycles.
Your plant might also be experiencing one of these issues:
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