Webs in Trees in Florida: Webworms, Tent Caterpillars, or Spider Webs?

Most webs in Florida trees are not evidence that the tree is dying.

Fall webworms can create large nests around leaves near branch tips. Tent caterpillars tend to build a tent in a branch fork. Spiders create open webs without enclosing and eating foliage.

A healthy mature tree can often tolerate limited webworm feeding. The main reasons to involve a tree service are unsafe access, dead or broken branches, clearance, or an independent structural problem.

Use this web-identification table

Web pattern	More likely explanation
Web encloses leaves at the end of a branch	Fall webworm
Dense tent sits in a branch fork or crotch	Tent caterpillar group
Open web stretches between twigs without leaf feeding	Spider
Individual hanging cases made of foliage	Bagworms, not webworms
Webbed branch is also cracked or hanging	Branch condition needs separate attention

Fall webworm clues

Fall webworms:

• build expanding webs around leaves
• feed inside the web
• often affect branch tips
• can make foliage look brown and messy
• may involve several nests on one tree

UF/IFAS notes that the visible damage is often primarily aesthetic, especially on an otherwise healthy tree.

Spider webs

Spider webs usually:

• do not enclose leaves
• contain no feeding caterpillars
• stretch between twigs or branches
• appear without defoliation
• do not require tree treatment

Spiders can be part of the landscape’s beneficial predator community.

Bagworms are different

Bagworms live inside individual hanging cases rather than a shared webbed nest.

Use Bagworms on Florida Trees when you see separate cases that resemble tiny cones or dried leaf bundles.

When leave-alone monitoring is reasonable

Monitoring may be enough when:

• only a few branch tips are affected
• tree has a full canopy
• no deadwood or cracking exists
• tree is mature and vigorous
• branch is away from important targets
• damage is not spreading heavily
• web is out of reach but not creating a safety problem

The visual nuisance may disappear before tree work would provide meaningful benefit.

When pest guidance may help

Seek identification when:

• small or newly planted tree is heavily defoliated
• webbing returns severely
• the host plant is stressed
• many branches are affected
• treatment is being considered
• insect cannot be identified from photographs

Any pesticide should be labeled for the pest, host, and site. Treatment tends to be more effective when caterpillars are young and nests are small.

Should homeowners remove the web?

On a small plant or low branch, it may be possible to remove or open a web safely from the ground.

Do not:

• burn the nest
• climb the tree
• use an unstable ladder
• cut a large healthy limb
• work near power lines
• spray an unidentified pest
• over-prune the canopy

If the web is high in a healthy tree, leaving it alone may be safer than attempting removal.

When pruning makes sense

Tree trimming may be appropriate when:

• affected branch is already dead
• limb is cracked or storm-damaged
• roof or driveway clearance is needed
• small ornamental has a localized dead section
• deadwood removal is part of a broader maintenance plan

Pruning is not a good response to temporary webbing on a large healthy branch.

Visit tree trimming services for high or target-exposed branches.

When the tree itself needs assessment

The web may simply draw attention to a separate problem.

Arrange a closer tree review when you also see:

• large dead limbs
• trunk crack
• cavity
• fungal growth
• root movement
• new lean
• repeated major limb failure
• canopy decline unrelated to the web
• storm damage

Use Dead Branches at the Top of a Tree when the primary symptom is canopy dieback rather than webbing.

What to photograph

Send:

1. entire tree
2. location of the web
3. branch tip or fork
4. leaves inside the web
5. caterpillars if safely visible
6. canopy condition
7. dead or cracked branch
8. targets below
9. nearby lines from a safe distance

Requesting tree work

Call (855) 498-2578 when the webbed branch is high, dead, broken, storm-damaged, over a target, or part of a larger tree-risk concern.

For ordinary insect identification, begin with Extension or a qualified plant-health professional.

Sources reviewed

• UF/IFAS — Fall Webworm
• UF/IFAS Gardening Solutions — Fall Webworm
• OSHA — Tree Care Industry Hazards and Solutions