Key takeaways
- Ficus whitefly arrived in Miami-Dade in 2007, feeds only on ficus and prefers weeping fig, the classic South Florida privacy hedge.
- Its life cycle takes about one month, and defoliation usually means the whitefly has been feeding for numerous months.
- Several ficus, including edible fig, fiddle-leaf fig and creeping fig, were not affected in UF/IFAS testing.
- Hedges usually regrow leaves once whiteflies are controlled; keep or bag clippings so infested leaves do not spread the pest.
In this article
Whiteflies are destroying ficus hedges because one species, the ficus whitefly (Singhiella simplex), feeds almost exclusively on ficus and favors weeping fig, the plant behind thousands of South Florida privacy hedges. Its nymphs drain sap from the undersides of the leaves until the hedge yellows, drops its leaves and, in bad cases, loses whole branches.
The damage is easy to underestimate because it builds out of sight. The insects sit under the leaves, the adults live only a few days, and by the time a hedge is visibly thin the infestation has usually been running for months. This guide explains how the ficus whitefly works, how to catch it early, which ficus are at risk and what helps a hedge recover.
Why Ficus Hedges Are So Vulnerable
Weeping fig (Ficus benjamina) grows fast, tolerates hard shearing and makes a dense green wall, which is why it lines property boundaries, pools and driveways from the Keys to Palm Beach. Those same rows of identical plants are an ideal food supply for a pest that eats only ficus.
According to UF/IFAS research by Dr. Catharine Mannion, the ficus whitefly has never been reported on anything other than ficus, and it is most commonly found on weeping fig. UF/IFAS Featured Creatures adds that it attacks at least eleven ficus species, with Ficus benjamina the preferred host in Florida. When one hedge is infested, the next one over is usually the same plant.
How the Ficus Whitefly Took Over South Florida
The ficus whitefly was reported in Miami-Dade County in 2007, attacking ficus trees and hedges, and UF/IFAS described it as a whitefly new to this continent. That year, pest control operators flooded the Miami-Dade Extension office with calls about hedges losing their leaves and properties losing their privacy. By 2010 it had been found in 16 Florida counties.
Elsewhere in the state, UF/IFAS Extension in Collier County reports that the whitefly “killed miles of ficus hedge in southwest Florida,” with one community’s weeping fig hedges failing about six years after the invasion. Collier County Extension adds that natural enemies arrived about eight years after the invasion and began reducing whitefly numbers, but the pest never disappeared. In 2022, after new reports of damage, UF/IFAS and USDA entomologists collected ficus samples in Miami-Dade to find out whether the insects had developed resistance to a key group of insecticides.
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How Whiteflies Damage a Ficus Hedge
Damage follows a typical sequence:
- Feeding under the leaves. Nymphs insert needle-like mouthparts and feed on sap.
- Yellowing. Collier County Extension calls yellow streaking on the foliage an easy-to-spot clue.
- Leaf drop. Defoliation is the most obvious symptom. UF/IFAS notes it means the whitefly has been present for “numerous months.”
- Branch dieback. Its severity varies, probably with the overall health of the plant.
- Decline. UF/IFAS Featured Creatures warns that without control, ficus whitefly can cause severe defoliation, branch dieback and, in some cases, plant death.
Unlike the larger rugose spiraling whitefly, ficus whitefly produces relatively little honeydew, so a ficus hedge can be badly damaged without turning black. If your hedge is coated in black sooty mold, read why your hedge is turning black to sort out the cause.
When Ficus Whitefly Damage Shows Up
In UF/IFAS research, ficus whitefly damage was most obvious in late summer and fall, and populations typically declined in winter. Sticky trap counts in that work climbed through the summer and peaked around October.
Source: UF/IFAS Tropical Research and Education Center
That pattern means the best time to look is spring and early summer, before the late-season damage appears.
How to Identify Ficus Whitefly on Your Hedge
Check the undersides of leaves from the inside and lower parts of the hedge, not just the outer shell. UF/IFAS Extension in Monroe County describes what to look for:
- A cloud of tiny white, gnat-sized flies when you disturb the foliage
- Adults with yellow bodies and white wings with a faint gray band
- Nymphs: tiny, flat, tan to light green ovals with red eyes that do not move
- Small silvery spots on the leaf undersides, which are shed skins
- Yellowing leaves that wilt and drop
At a constant 80°F, UF/IFAS research recorded about 10 days for the egg stage and roughly 17 more for the four nymphal stages, with adults living only 2 to 4 days. Because adults are so short-lived, they are not a reliable indicator; the nymphs and pupal cases are. For a broader checklist that covers other whiteflies too, see our guide to whitefly signs of infestation.
Which Ficus Are Most at Risk?
Not every ficus is a host. UF/IFAS tested common landscape ficus in Florida:
| Ficus | Ficus whitefly status in UF/IFAS research |
|---|---|
| Weeping fig (F. benjamina) | Host; preferred host |
| Indian laurel (F. microcarpa) | Host |
| Strangler fig (F. aurea, native) | Host |
| Shortleaf fig (F. citrifolia, native) | Host |
| Alii ficus (F. binnendijkii ‘Alii’) | Host |
| Green Island ficus (F. microcarpa ‘Green Island’) | Not susceptible |
| Fiddle-leaf fig (F. lyrata) | Not susceptible |
| Creeping fig (F. pumila) | Not susceptible |
| Edible fig (F. carica) | Not susceptible |
| Sacred fig (F. religiosa) | Not susceptible |
| Rubber plant (F. elastica ‘Burgundy’) | Not susceptible |
If you are replacing a failed hedge, this list helps you avoid planting the same problem again.
What Hedge Owners Can Do
These steps come from UF/IFAS guidance for ficus hedges:
- Monitor regularly. Early detection makes control easier, because the population takes several generations to become damaging.
- Reduce pruning on infested plants. Shearing adds stress to a hedge that is already losing sap.
- Keep or bag clippings. Late-stage whiteflies on cut or fallen leaves can survive, emerge as adults and attack more ficus. Leave clippings on your property or bag them before disposal.
- Wait for new growth. If the hedge has already lost its leaves, avoid overwatering and wait for new growth before applying pesticides.
- Use soft products on small plants. On small trees or shrubs, insecticidal soap or horticultural oil can help; spray late in the day, coat the leaf undersides and repeat every 7 to 10 days, following the label.
- Protect natural enemies. At least two parasitoids, five beetle predators and lacewings attack ficus whitefly. UF/IFAS Featured Creatures notes that the parasitic wasp Baeoentedon balios, first found in the New World in Homestead in 2014, became the dominant parasitoid in surveys, and advises checking for natural enemies before heavy pruning or spraying.
Because hedges often run along property lines, coordinate with neighbors when you can. Our article on why whiteflies spread so fast in South Florida explains how a hedge next door can keep reinfesting yours.
Professional Treatment and Hedge Recovery
For long or tall hedges, UF/IFAS research points to systemic insecticides applied to the soil or trunk as the longer-lasting option, with control lasting about one year and spring application preferred. Foliar sprays are best kept for quick knockdown of hot spots where live whiteflies are present, and the same active ingredient should not be used on both the foliage and the soil. UF/IFAS also warns that overusing or misusing insecticides can lead to resistance.
Toro’s whitefly control service begins with a free inspection of your ficus hedges, palms and trees, including the underside of the leaves, to identify which whitefly you have and how heavy the infestation is. You get a clear plan and a quote before work begins, then treatment of the infested plants and checks of your ficus for early signs of new whiteflies. Toro’s technicians train at the TORO Institute with on-staff entomologists, and the work is backed by the 110% Satisfaction Guarantee.
Recovery takes patience. Hedges usually grow their leaves back once the whitefly is under control, and dead branches should be pruned out. For photos of the adults and nymphs, visit Toro’s whitefly pest library page.
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305-594-4767Frequently Asked Questions
Will my ficus hedge grow back after whitefly damage?
Should I replace my ficus hedge with another plant?
Is ficus whitefly the same as the whitefly on my palms?
Why is my ficus hedge dropping leaves if I see no whiteflies?
Sources
- Ficus Whitefly Management in the Landscape, UF/IFAS Tropical Research and Education Center
- Take a Good Look at Your Ficus Hedge, UF/IFAS Extension Monroe County
- Balios Eulophid Baeoentedon balios Wang, Huang & Polaszek (Insecta: Hymenoptera: Eulophidae), UF/IFAS Featured Creatures
- Do You Remember the Ficus Whitefly?, UF/IFAS Extension Miami-Dade County
- Ficus Whitefly, Singhiella simplex, was One of the Most Destructive Landscape Pests, UF/IFAS Extension Collier County
- Whiteflies, UF/IFAS Tropical Research and Education Center
Educational content. This article is for general information about pests in South Florida and is not medical, legal or professional advice. If you have a bite, sting or allergic reaction, contact your doctor; in an emergency, call 911. Pest problems vary from home to home, so a licensed professional should inspect before treatment. When using any pesticide, always read and follow the product label.
