Fiddle leaf figs attract a handful of common houseplant pests, most of which feed by piercing leaves and sucking out the cell contents. The usual culprits are spider mites, mealybugs, scale insects, thrips, and fungus gnats. Catching them early makes treatment straightforward, but a heavy infestation left unchecked can cause serious leaf damage, dropping, and decline. Here’s how to identify each pest, get rid of it, and keep it from coming back.
Spider Mites
Spider mites are the most common fiddle leaf fig pest, and they’re easy to miss. They look like tiny brown, black, or red dots on the leaf surface, small enough that you might mistake them for specks of dirt or early signs of edema. Grab a magnifying glass: if the dots are moving, you have mites. They prefer the undersides of leaves and tend to go after new, tender growth first, sucking juice from the cells and causing discoloration, stippling, and eventually shriveling.
The other telltale sign is fine, cottony webbing, especially where leaves meet stems and along leaf undersides. By the time you see webbing, the population is already well established.
For an early catch, a focused jet of water is often enough. Take your plant to the shower, bathtub, or outside and spray the undersides of every leaf until the mites are physically knocked off. For heavier infestations, prune the worst-affected leaves, bag them, and throw them away before the mites spread. Follow up with a diluted neem oil solution (one to two tablespoons of neem oil per gallon of water with a teaspoon of mild dish soap) applied to both sides of every remaining leaf. Repeat weekly for two to three weeks to catch any eggs that hatch after the first treatment.
Mealybugs
Mealybugs announce themselves with white, cottony masses tucked into leaf joints, along stems, and on the undersides of leaves. They’re soft-bodied insects coated in a waxy, filament-like covering that makes them look like tiny tufts of cotton. Like spider mites, they feed on plant sap. A small number won’t do much visible harm, but a growing colony causes yellowing leaves, sticky residue (called honeydew), and eventually leaf drop.
The most targeted treatment is rubbing alcohol applied directly. Dip a cotton swab in undiluted isopropyl alcohol (no higher than 70%) and press it onto each visible mealybug for an instant kill. After removing the adults you can see, mix equal parts rubbing alcohol and water with a couple of drops of liquid dish soap, spray the entire plant (leaves, stems, and lightly across the soil surface), and let it sit for five to ten minutes. Then rinse the whole plant thoroughly with plain water. Repeat every few days for at least two weeks, since eggs hidden in crevices will continue hatching.
Scale Insects
Scale looks less like an insect and more like a small, waxy bump glued to a stem or leaf vein. The hard, shell-like covering protects the insect underneath, which makes scale surprisingly resistant to sprays. You’ll usually find them along the midrib of leaves or clustered on woody stems. Like mealybugs, they produce sticky honeydew, so if your fiddle leaf fig’s leaves or the floor beneath it feel tacky, check closely for scale.
For a light infestation, dip a cotton pad in undiluted rubbing alcohol and physically wipe each scale insect off. Their grip is firm, so you may need to press and slide rather than just dab. For a heavier case, spot-treat visible insects with undiluted alcohol, then spray the rest of the plant with a diluted solution: one cup of rubbing alcohol and a tablespoon of dish soap mixed into one liter of water. Repeat every three days for at least two weeks. The lifecycle of scale means new crawlers (the mobile juvenile stage) will keep emerging, so consistency matters more than intensity.
Thrips
Thrips are harder to spot than most fiddle leaf fig pests. They’re slender, rice-shaped insects only about 1 to 2 millimeters long. They feed by puncturing leaf cells with a single sharp mouthpart and sucking up the contents, leaving behind pale, silvery streaks or flecked patches where rows of emptied cells run together. You may also notice tiny dark specks of frass (thrips excrement) on the leaf surface near the damage.
Thrips can fly short distances, which means they spread between plants more readily than crawling pests. Insecticidal soap and horticultural oil are low-toxicity contact options that work well for houseplant infestations. Spray thoroughly, covering both leaf surfaces and stems, and repeat every five to seven days. For persistent problems, predatory mites (sold online as biological controls for indoor use) can help suppress thrips populations without chemicals.
Fungus Gnats
Fungus gnats are the tiny black flies that hover around the soil surface and scatter when you water. The adults are mostly a nuisance, but their larvae live in the top inch or two of soil and feed on organic matter and fine root hairs. A large larval population can slow growth and stress a young plant, though established fiddle leaf figs usually tolerate them without visible harm.
The fix is simple: let the soil dry out more between waterings. Fungus gnat larvae need consistently moist soil to survive. A layer of coarse sand or perlite on top of the soil also discourages adults from laying eggs. Yellow sticky traps placed near the base of the plant catch adults and help you gauge whether the population is shrinking. If drying the soil out isn’t enough, a soil drench with a solution containing the naturally occurring bacterium Bt (Bacillus thuringiensis subspecies israelensis), available at most garden centers, kills larvae without harming the plant.
How to Avoid Leaf Burn During Treatment
Neem oil, insecticidal soap, and alcohol solutions can all damage fiddle leaf fig leaves if applied carelessly. Never apply undiluted neem oil directly to the foliage. It’s concentrated enough to chemically burn leaf tissue, especially on a plant that gets any direct sun. Always dilute it (one to two tablespoons per gallon of water plus dish soap) and apply early in the morning or in the evening, never in midday sun. Neem temporarily increases photosensitivity, so keep your plant out of direct light for at least several hours after treatment and let it dry completely before moving it back to its usual spot.
The same caution applies to rubbing alcohol. While undiluted alcohol is fine for targeted spot treatment on a cotton swab, spraying it full-strength across large leaf areas can strip the waxy cuticle. Stick to a 1:1 dilution with water for whole-plant sprays, and always rinse after the recommended wait time.
Preventing Pests Before They Start
Most fiddle leaf fig pest problems start with a new plant brought home from a nursery or garden center. Before you place a new plant anywhere near your existing collection, isolate it for at least two weeks. During that time, inspect the leaves and stems daily, checking both surfaces, the joints where leaves meet stems, and the top of the soil.
A good first-day routine is to take the new plant to the shower or outside, spray it down thoroughly with water to knock off any hitchhikers, then treat the entire plant (leaves top and bottom, stems, pot, and soil surface) with a diluted neem oil solution. Let the solution sit for at least 30 minutes, then wipe the leaves dry. This combination of physical removal and a suffocating oil treatment catches most problems before they have a chance to establish.
For your existing fiddle leaf fig, wiping the leaves every few weeks with a damp cloth removes dust, improves the plant’s ability to photosynthesize, and gives you a regular close look at the leaf surfaces. Pests thrive in dry, stagnant conditions, so good air circulation and consistent (not excessive) watering create an environment that’s less hospitable to most of the insects on this list. Healthy, well-watered plants also recover from minor infestations faster than stressed ones, so basic care is itself a form of pest prevention.