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14 Φεβ 2021 · They’re very tiny, black insects that suck the juices out of the leaves, causing unwanted damage to your plants. Thrips can multiply very quickly and they can fly, which makes getting rid of them that little bit harder.
The existence of black mold on leaves could signal a potential thrip infestation. This occurs from a combination of plant damage and thrip activity. The plant sustains damage, releasing plant juices, some of which may remain unconsumed by the insects.
Indoor plant leaves turn black due to watering issues, poor drainage, pests, fungal and bacterial infections, cold drafts, humid weather, or excessive fertilization. Improve watering, ensure drainage, deal with infestations, avoid cold drafts, improve air circulation, and fertilize sensibly.
Heavily infested plants will show yellow and brown, almost stippled patches in an irregular pattern, and new growth can look stunted, contorted, or deformed. You may also see sooty black spots along leaves or stems. This is thrips fecal matter, which can also be a vector for disease.
If you're unsure, gently blowing on them will cause them to start moving. Other indications of the insects being present include little black spots on the leaves and tiny droplets of random plant sap ozzing from the affected plant leaves. Yellowing and mottling leaves are also very typical.
Check for mottled or silvery streaked foliage, dusty black droppings, or distorted young leaves or flowers. Thrips damage is more likely in hot, dry conditions. You can stave off an infestation by keeping your plant healthy.
Adult thrips (black) and several larvae (light yellowish) on a Peperomia obtusifolia leaf. Thrips eat away at the leaf surface, leaving silvery scratch marks – if you see this kind of leaf damage, check both sides of the leaf – look for the light yellow larvae and/or the thin black adult thrips.
