What's Eating Your Star Jasmine?

Trachelospermum jasminoides

Reviewed by Kiersten Rankel M.S.

Quick Answer

For star jasmine, the most likely culprits are aphids clustered on new growth and flower buds during the spring flush, scale insects glued to the woody twining stems and leaf undersides, and spider mites in hot drought stress. Mealybugs sometimes hide where leaves meet the stem in opposite pairs but are less common on this generally pest-resistant vine.

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What does the damage look like?

Tap the closest match to jump straight to the fix.

Curled new growth and bud clusters

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Brown bumps along woody stems

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Pale specks and fine webbing

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White cottony tufts at leaf joints

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Pests, ranked by impact

Aphids

Damage

Medium

Removal

Easy

What it looks like

Tiny pear-shaped insects 1 to 3 mm long, in green, brown, or black. Cluster densely on the soft new growth at vine tips and on the green flower bud clusters before the white pinwheel flowers open. Spring flush is peak aphid season for star jasmine.

What the damage looks like

New leaves at the vine tips curl and twist as aphids drain sap. A sticky shiny film coats leaves and the trellis below. Black sooty mold grows on the residue over a few weeks. Heavy spring infestations stunt the bud clusters and reduce the fragrant bloom display for the year.

How to get rid of them

Option 1

Strong water blast every 2 to 3 days for 2 weeks

Hold a hose nozzle 12 inches from the affected vine tips and bud clusters and spray at high pressure. Most aphids dislodge and don't make it back onto the woody stems. Star jasmine handles a hard rinse well. Repeat every 2 to 3 days for 2 weeks. The fastest, cheapest fix and works without chemicals.

Option 2

Neem oil spray at dusk, every 5 days for 3 rounds

Mix 2 tablespoons cold-pressed neem oil with 1 teaspoon dish soap per gallon of water.

Spray the underside of every leaf at the vine tips and around the bud clusters at dusk.

Repeat every 5 days for 3 rounds. Covers the egg-to-adult cycle through the spring flush.

Option 3

Plant alyssum or yarrow at the base of the trellis

Plant alyssum, dill, or yarrow within 3 feet of the trellis or fence the vine climbs. These attract ladybugs and lacewings, which feed on aphids and patrol the dense leaf canopy. Established plantings keep aphid pressure low without sprays year after year.

Brown soft scale (Coccus hesperidum) clustered on a plant stem

Scale insects

Damage

Medium

Removal

Hard

What it looks like

Hard or soft brown bumps stuck to the woody twining stems, leaf undersides, and the leaf-stem junctions where opposite leaf pairs attach. 1 to 4 mm wide. Look like tiny barnacles glued in place. The dense leaf canopy creates the dim humid hiding spots they thrive in.

What the damage looks like

A sticky shiny film on leaves and the ground or trellis below. Black sooty mold grows on the residue over weeks. Yellowed leaves around each cluster, often in pairs because of the opposite leaf arrangement. Heavy clusters weaken that vine section and reduce its next bloom.

How to get rid of them

Option 1

Scrub and oil weekly for 4 weeks

Wet the affected woody stems and leaf surfaces with horticultural oil (Bonide All Seasons, ~$15).

Scrub gently with a soft toothbrush along the stems to dislodge bumps and break the waxy seal. The milky sap from any cuts is normal for star jasmine.

Spray a final coat of oil and leave on. Repeat weekly for 4 weeks to catch newly hatched crawlers.

Option 2

Insecticidal soap on heavily infested sections

Spray ready-to-use insecticidal soap (Safer Brand, ~$10) on the underside of leaves and along the woody stems at dusk. Coat thoroughly. Soap works only when wet, so reapply every 5 to 7 days for 3 weeks to keep pressure on through the crawler cycle.

Option 3

Prune out the worst-infested vine sections

Cut out and bag any vine sections where bumps cover more than half the stem. Star jasmine recovers fast from pruning and the vine fills back in within a season. Removing the worst clusters resets the population. Bag and dispose. Do not compost.

Spider mites

Damage

Medium

Removal

Moderate

What it looks like

Almost invisible without a hand lens. Yellow-green to red-orange specks running along the underside of the small oval leaves. Hot drought stress is the trigger on star jasmine, especially on south-facing fences and trellises in midsummer.

What the damage looks like

Tiny pale yellow dots speckled across the upper leaf surface, then bronze patches that spread between leaf veins. Fine webbing strung between opposite leaf pairs and along the stem in heavy infestations. Affected leaves drop, thinning the vine canopy and exposing more leaves to drought stress.

How to get rid of them

Option 1

Shower the foliage weekly for 3 weeks

Hose the vine down on a warm day, spraying cool water on the underside of every leaf for 30 seconds at a time, working along the trellis. Mites can't reattach quickly when knocked off, and the rinse humidity slows survivors. Star jasmine handles a hard rinse well. Repeat weekly for 3 weeks.

Option 2

Neem oil at dusk, every 5 days for 3 rounds

Mix 2 tablespoons cold-pressed neem oil and 1 teaspoon dish soap per gallon of water.

Spray the underside of every leaf at dusk, working through the dense vine canopy in sections.

Repeat every 5 days for 3 rounds. That covers the full egg-to-adult life cycle.

Option 3

Deep water during heat waves

Mites explode when star jasmine is drought-stressed. During a heat wave, deep water at the root zone once a week (about 1 inch of water for an established vine). A hydrated vine resists mites far better than a stressed one. This is the cheapest long-term defense.

Mealybugs

Damage

Medium

Removal

Hard

What it looks like

Soft white insects covered in cottony fluff, 2 to 4 mm long. Cluster where the opposite leaf pairs meet the woody stem and deep inside the dense vine canopy where airflow is poor. More common on container-grown patio specimens than on outdoor trellis vines but still occasional.

What the damage looks like

White cottony tufts visible at leaf-stem junctions and along the woody stems. A sticky shiny film on leaves below the cluster, often with black sooty mold. New leaves near affected joints emerge stunted or yellowed. Severe infestations on container plants can stunt the vine for the season.

How to get rid of them

Option 1

Cotton swab dipped in 70% isopropyl alcohol

Dab every visible mealybug with a cotton swab dipped in 70% alcohol. The alcohol melts the waxy coating and kills on contact. Pull the opposite leaf pairs apart gently to reach colonies tucked at the leaf-stem junction. Repeat every 3 days for 3 weeks to catch newly hatched eggs.

Option 2

Insecticidal soap and neem oil rotation, 4 weeks

Spray ready-to-use insecticidal soap on the underside of leaves and into leaf joints at dusk. Alternate weekly with neem oil. Continue for 4 weeks because eggs hatch in protected pockets over time and need ongoing pressure. Star jasmine's small leaves make full coverage easy.

Option 3

Thin the vine to improve airflow

Mealybugs love the dim still air inside a dense star jasmine canopy. After treatment, prune out crossing stems and thin the vine so light and air reach the interior. A thinned vine is far less hospitable to mealybugs and drops the reinfestation rate.

Stay ahead of all of them

Four habits that keep star jasmine pests rare and easy to catch.

Inspect right after the spring flush

Aphids hit star jasmine hardest as the new growth and flower buds emerge in spring. A 2-minute walk along the trellis once a week through April and May catches the colonies on the bud clusters before they damage the bloom display.

Thin the vine every year or two

Star jasmine grows densely and creates leaf-tunnel hiding spots for scale and mealybugs. Thinning out crossing stems improves airflow and light penetration into the interior canopy. A thinned vine has noticeably fewer pest hiding spots and looks healthier too.

Joint and underleaf check, every Sunday

Scale, mealybugs, and spider mites all hide where the opposite leaf pairs meet the woody stem and on the underside of leaves. A weekly 30-second scan of a few sections of the vine catches colonies while they're still local to one branch.

Deep water during summer heat waves

Drought-stressed star jasmine is a magnet for spider mites. One deep weekly soak (about 1 inch of water for an established vine) during heat waves keeps the vine hydrated and the leaves resistant. The healthiest vines almost never get a serious mite outbreak.

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About This Article

Kiersten Rankel M.S.

Botanical Data Lead at Greg · Plant Scientist

About the Author

Kiersten Rankel holds an M.S. in Ecology & Evolutionary Biology from Tulane University. A certified Louisiana Master Naturalist, she has over a decade of experience in science communication, with research spanning corals, cypress trees, marsh grasses, and more. At Greg, she curates species data and verifies care recommendations against botanical research.

See Kiersten Rankel's full background on LinkedIn.

Editorial Process

Pest identification and treatment guidance verified against Trachelospermum jasminoides field reports from Greg's botanical database, cross-referenced with university extension sources and published horticultural research.

2,606+ Greg users growing this plant

USDA hardiness zones 8a–10b

Citations:
Missouri Botanical Garden
NC State Extension
Royal Horticultural Society
UF IFAS Extension
Aphid photo: Scot Nelson (CC0)
Scale photo: Whitney Cranshaw, Bugwood.org (CC BY 3.0 US)
Spider mite photo: Clemson University - USDA Cooperative Extension, Bugwood.org (CC BY 3.0 US)
Mealybug photo: Gianni Del Bufalo (CC BY 2.0)