Holes in Leaves on Alocasia Stingray: Causes, Checks & Fixes

Quick answer

Holes in Alocasia Stingray (Alocasia macrorrhizos ‘Stingray’) leaves mean something removed or tore tissue—chewing insects, leaf miners, physical snags during unfurling, or dry-air splits as new round ray-tail blades open. Unlike split-leaf monsteras, indoor alocasias keep whole glossy leaves with prominent venation. The RHS lists Stingray as a macrorrhizos cultivar with round blades tapering to an elongated tail on upright stalks—any open hole is damage, not a natural fenestration pattern.

For how chewing pests and mechanical tears work in general, see our holes in leaves guide. On Stingray, the diagnostic clue is usually on the tallest new petiole—soft leaves unfurl at the top of long red-mottled stalks where caterpillars hide, thrips scar tissue, and dry air can split a large round blade before it fully opens.

First step: look at the hole edge, then inspect the newest unfurling leaf at the top of the tallest petiole and every petiole base at the crown under bright light. Ragged chew marks with frass need a different fix than a clean tear on one ray-tail leaf that snagged against a wall during a repot.

When to use this page vs other Stingray guides

What holes in leaves look like on Alocasia Stingray

Stingray leaves are large, round, and glossy, tapering to an elongated ray-tail point on upright red-mottled petioles that can reach 60 cm or more. A healthy indoor specimen often carries three to six dramatic floor-sized blades on tall stalks, so one holed leaf removes a significant share of the plant’s photosynthetic surface. When you see a hole, sort it by pattern:

Caterpillar chewing — Irregular holes and notched margins, often starting on the softest new leaf at the top of the tallest petiole. Dark frass pellets on leaves, petioles, or the floor below. Larvae tuck into overlapping axils where large round blades meet the crown. See caterpillars on Alocasia Stingray.

Leaf miner trails — Winding pale or brown tunnels inside the round leaf with only a small exit hole—not a large ragged chew. Uncommon indoors but appears after outdoor summer placement. See leaf miners.

Thrips rasping — Tiny scrape marks, silvery streaks, and black varnish-like specks on the glossy surface; new ray-tail blades may look scarred or distorted as they unfurl. Full-thickness holes are less common than stippling. See thrips.

Unfurl tears in dry air — Small holes or linear splits at the center of a newly opened round blade where the folded leaf stuck together while opening. Often paired with crispy margins in winter rooms below the 60–75% humidity Stingray prefers. No frass, no trails.

Mechanical pinches during growth — Clean round or linear holes on one leaf that was bent, pressed against a shelf lip, or caught during repotting while still soft on a tall petiole. Damage stays on that leaf after you stop moving the pot; no spread to new growth.

Fungal shot-holes — Dark spots with yellow margins may be fungal leaf spot; dried centers sometimes drop, leaving small perforated areas—usually with preceding brown halos, unlike clean mechanical tears. Route persistent spotting to black spots.

Ragged chew margins with frass point to caterpillars; clean one-time holes on a single unfurled ray-tail blade often mean mechanical contact or a dry-air split—not an active pest.

Ray-tail tip snag inspection (Stingray only)

The elongated pointed tail that gives Stingray its name extends well beyond the round blade—often 10–20 cm past the main leaf surface on mature floor plants. As new leaves unfurl at the top of tall upright petioles, that soft ray-tail tip can catch on shelf lips, wall corners, curtain rods, or neighboring plant foliage before the blade hardens. The result is a clean round or linear hole near the tail end, sometimes with a bent petiole if the whole stalk was pulled sideways. Damage is limited to the one leaf that was snagging during growth; the next ray-tail blade opens cleanly once you give the plant floor clearance. This pattern is time-locked, not infectious, and does not need pesticide.

Tall petiole mechanical pinch (Stingray only)

Stingray pushes new leaves from a central corm at soil level, but each blade rides up on a long red-mottled petiole that can stand 40–80 cm tall indoors. During spring repotting or floor moves, bending a still-soft 60 cm round leaf against the pot rim, a cachepot edge, or a trailing neighbor plant leaves a clean hole that only becomes visible days later when the blade fully opens. Because the plant carries fewer leaves than compact jewel alocasias, one mechanical tear on a flagship ray-tail blade is easy to misread as insect feeding—check whether the pot was moved recently before you spray.

Floor-plant backlight inspection (Stingray only)

The huge glossy round blade and bold venation that make Stingray a statement floor plant also hide early pest damage on the upper surface. Spider mites and thrips are common alocasia pests, but stippling on shiny green tissue reads as pale gray dots rather than obvious yellow patches. Because leaves sit at chest height or above, tilt each round blade toward a window and use a phone flashlight on the underside—webbing, black thrips specks, and pale feeding marks show up against the venation before you see holes. Never mist glossy Stingray foliage to “inspect” pests; water trapped on the lacquered surface encourages fungal spotting without helping diagnosis.

Why Alocasia Stingray gets holes in leaves

Chewing pests are the most common cause of true full-thickness holes indoors. Alocasia are prone to spider mites, aphids, and mealybugs; caterpillars and leaf miners arrive on nursery stock, open windows, or patio placements. Caterpillars chew ragged holes; miners tunnel between leaf surfaces.

Large floor-sized foliage hides feeders at the crown. Stingray’s upright habit and few but massive overlapping round leaves create sheltered axils at the soil line—ideal for caterpillars and thrips on the softest tissue at the top of the tallest petiole while older outer blades look untouched.

Dry indoor air splits unfurling round blades. Low humidity causes brown tips and edges on houseplants and may attract red spider mites in dry air; on Stingray it can also tear new ray-tail leaves apart as they open from the crown. This is environmental, not contagious.

Floor placement and tight corners pinch soft tissue. Stingray needs room to spread its ray-tail blades; crowding against walls bends petioles and blocks new leaves from opening cleanly—a common cause of mechanical holes on this macrorrhizos cultivar that Polly owners rarely see on compact shelf plants.

Stress from wet roots invites secondary pests. Overwatered alocasias develop yellow leaves and root issues; weakened plants in soggy chunky aroid mix that has compacted are more attractive to sap feeders and harder to recover from simultaneous crown damage. Check overwatering if petioles feel mushy alongside holes.

Stingray does not develop natural perforations the way mature Monstera deliciosa fenestrates. If someone suggests “your alocasia is supposed to have holes,” that advice applies to different species—not this round ray-tail cultivar.

How to confirm the cause

Work through these checks in order:

1. Edge test — Ragged, irregular margin with chew marks → insects. Clean linear tear → mechanical or unfurl snag. Serpentine trail visible when you backlight the round leaf → leaf miner.
2. Frass or slime — Dark pellets on leaves or on the floor below → caterpillars. Shiny slime on the rim → slugs or snails (rare indoors). Neither → consider mechanical, dry-air unfurl tears, or old fungal shot-holes.
3. Tallest petiole first — Follow the longest upright stalk to the softest unfurling blade at the top. Active feeding usually hits soft tissue there before older, leathery outer blades lower on the plant.
4. Ray-tail clearance — Check whether the elongated tail end was pressed against a wall, shelf, or neighbor plant when the hole appeared.
5. Night patrol — Check axils and unfurling tips with a flashlight after dark. Caterpillars feed when room lights are low.
6. Shake test — Hold white paper under a suspect leaf and tap the petiole. Slow-moving worms confirm caterpillars; quick jumping specks point to thrips.
7. Timeline — New holes on different leaves weekly signal active feeding. One unchanged tear for a month suggests past snag or dry-air split.
8. Humidity check — If only the newest crown leaf has a center split and margins are crispy, raise humidity before treating for pests.
9. Persistence rule — Damage that keeps appearing on new leaves is active. One hole on one old leaf that never repeats is usually finished mechanical or environmental stress.

First fix for Alocasia Stingray

Photograph the holed leaf, examine the hole edge, then inspect the tallest new petiole and every crown axil before you spray, repot, or change watering.

Do not change watering or fertilize a holed Stingray before you know whether insects are active. Extra nitrogen pushes soft crown growth that chewers prefer. Do not mist glossy leaves as a “first fix”—use a humidifier instead.

Step-by-step recovery

After the first targeted fix:

1. Re-inspect every three to five days for two weeks—one missed caterpillar can open a new hole on the next unfurling ray-tail blade.
2. Hold isolation until no new damage appears on emerging foliage. Stingray floor pots often sit near other large tropicals.
3. Wipe dusty glossy leaves monthly with a barely damp microfiber cloth, supporting each large blade from underneath—improves pest visibility without soaking the lacquered surface.
4. Prune only when necessary — Remove leaves more than half destroyed after pests are gone. Partial holes on green blades still photosynthesize on a plant with only a handful of large leaves.
5. Adjust placement — Keep ray-tail tips away from walls, shelf lips, heating vents, and glass that dry unfurling tissue. Stingray needs floor space, not a tight corner.
6. Scout after outdoor time — Rinse and quarantine patio plants before mixing them back into your collection.

For a plant with miners or caterpillars on every leaf, salvaging a firm corm and waiting for spring growth may be faster than repeated chemical treatment—especially if the plant was already entering winter dormancy when it dropped foliage.

Recovery timeline

Holed tissue does not fill in. Judge recovery by clean new crown leaves, not by old perforated blades. Stingray in bright indirect light with stable watering often outgrows light damage within one to three weeks once the cause is removed—though new leaves emerge on a faster rhythm only during active summer growth when temperatures stay in the 18–26°C comfort zone.

Lookalike symptoms to rule out

Yellow lower leaves without holes point to overwatering or not enough light—not chewing.

Brown crispy tips without open holes suggest low humidity or brown tips from dry air—not caterpillars.

Sticky honeydew without ragged holes suggests aphids, mealybugs, or scale—sap feeders, not chewers.

Curling without perforation suggests curling leaves from stress or pests—different diagnosis path.

Natural fenestration does not apply to Stingray. Missing splits on a monstera is a different problem; ray-tail alocasia leaves should stay whole.

Mistakes to avoid

Do not spray insecticide before confirming live pests—mechanical tears and dry-air unfurl splits do not need chemical treatment.

Do not assume one holed leaf means the problem is solved. Follow the tallest petiole and check axils at the crown.

Do not mist glossy Stingray foliage to raise humidity—water on the lacquered surface invites fungal marks without fixing unfurl tears. Use a humidifier.

Do not repot on the same day you find holes unless root rot or soil failure is confirmed—moving a floor pot while crown leaves are soft on tall petioles causes new mechanical tears.

Wear gloves when handling damaged Stingray; sap contains calcium oxalate crystals that irritate skin. Keep the plant away from pets—ingestion causes oral irritation and vomiting.

How to prevent holes next time

• Quarantine new Stingray plants two weeks before mixing collections.
• Run a humidifier at 60–75% during heating season to protect crown unfurling—see low humidity.
• Give ray-tail tips clearance from walls, shelves, and overhead obstacles—Stingray is a floor plant, not a corner shelf specimen.
• Avoid moving or repotting while new leaves are emerging on tall petioles.
• Scout the tallest new petiole weekly during spring and summer when moths and thrips are most active near open windows.
• Keep bright indirect light without scorching—stressed plants in dim corners are harder to inspect and slower to replace lost leaves.
• Water from soil dryness, not leaf appearance—stressed plants in wet soil are more vulnerable to secondary problems.
• Keep floor pots above pet reach; Stingray is toxic if chewed.

When to worry

Escalate when:

• Fresh holes appear on multiple leaves within a week
• Leaf-miner trails spread through several new crown leaves
• Frass accumulates across the crown despite handpicking
• New ray-tail tips stop unfurling because tissue is stripped or mined
• Red-mottled petioles soften and collapse—check root rot alongside pest damage

A single old tear on one outer leaf, with firm petioles and clean new growth at the crown, is usually not an emergency. Discard and restart from a firm corm only when every leaf is mined or stripped, repeated treatment failed, and the plant has no clean crown growth left to salvage.

Conclusion

Holes in Alocasia Stingray leaves always mean damage—chewing, mining, tearing, or spotting—not a natural leaf pattern. Read the hole edge, inspect the tallest new petiole and crown axils, and match the pattern before you spray or repot. Stingray recovers once the cause is gone; focus on clean unfurling ray-tail blades, quarantine discipline, and keeping the floor plant away from snags and dry-air splits.

Related Alocasia Stingray guides

• Stingray overview — placement, growth habit, and care baseline
• Stingray watering — when wet soil is not the issue
• Stingray light — bright indirect light for steady crown growth
• Stingray soil — chunky aroid mix that dries predictably
• Caterpillars on Stingray — ragged holes with frass
• Leaf miners on Stingray — tunnels inside the round blade
• Thrips on Stingray — silver streaks and scarred tips
• Low humidity on Stingray — unfurl tears in dry air
• Stingray problems hub — all common issues on this species

Related tool

Use the Plant Problem Diagnosis Tool to narrow causes for holes in leaves on this plant before changing multiple variables at once.