How do we get rid of tea scale on the camellias and hollies in our HOA's landscaping?

By OurHOA · General information · Revised October 31, 2026

How an HOA board handles tea scale on camellias and hollies: confirm it is alive, prune, time oil sprays to crawlers, and use soil systemics only on heavy beds.

Part of the HOA board handbook: vendors, projects and upkeep.

The short answer

Tea scale is a small armored insect that lives on the undersides of camellia and holly leaves and shows up as yellow blotches on the tops. Mississippi State Extension calls it the most common insect pest of camellias, and it rarely goes away after one treatment. A board that wants it under control should: 1. Confirm the pest and check whether the scales are still alive. 2. Thin crowded shrubs so air moves and sprays can reach the leaf undersides. 3. Have the contractor spray horticultural oil on the undersides two or three times, 7 to 10 days apart. 4. Save soil-applied systemic insecticides for beds that stay heavily infested. It is a landscape problem, not an emergency. Light infestations can be tolerated. Heavy ones cost you blooms, leaves and eventually the shrub, usually at an entrance or clubhouse bed where owners notice. Pest control licensing and product rules differ by state, and labels change, so treat this as general guidance and follow the product label. Our guide on hiring an HOA landscaping contractor covers how to write the scope.

Make sure it is tea scale

Turn a yellow-blotched leaf over. The UF/IFAS profile EENY250 and Mississippi State's Extension entomologist describe what you should see: - Adult females under brown, narrow, oyster-shaped covers about 1/10 inch long, with a darker ridge down the middle. - A white, fuzzy or cottony layer, which is mostly the soft white covers of the males. Heavy infestations look like the leaf underside is coated in felt. - Tiny yellow crawlers, easiest to see with a hand lens. On the top of the leaf, feeding causes yellow stippling or blotches. Clemson Extension adds leaf drop, fewer blooms and reduced growth in heavy infestations. Tea scale's main hosts are camellias (both japonica and sasanqua) and hollies, and Clemson notes it also turns up on boxwood and euonymus. The white fuzz is easy to mistake for a fungus, and the yellowing is easy to blame on fertilizer. If you are unsure, take a bagged leaf sample to your county Extension office before anyone sprays.

Check whether it is alive before you pay

Dead scales stay stuck to the leaf, so a bed that was treated last year, or that parasites have already worked over, can look as bad as an active infestation. EENY250 gives two quick checks: - Squeeze test. Press a few brown covers between thumb and finger. Live scales leave a smear of body fluid. Dead ones are dry. - Exit holes. Several native parasitic wasps attack tea scale in Florida and Georgia. A wasp that has finished developing chews a small round hole in the cover on its way out. EENY250 says to make sure an infestation is not already being controlled by these natural parasites before applying pesticides. Have the contractor or a director check a dozen leaves from each bed, write down live versus dead and any exit holes, and photograph the worst leaves. If most scales are dead or parasitized, prune and watch instead of spraying.

Timing depends on where you are

Spraying works on crawlers, the only stage that moves. EENY250 says crawlers wander for one to four days looking for tender tissue, then settle, insert their mouthparts and stay put under a protective cover. Settled adults are hard to reach with any spray. The calendar changes by climate: - Florida: tea scale stays active all year and reproduces continuously, with a life cycle of about 45 to 65 days depending on temperature. There is no single crawler window, so the plan relies on repeat sprays and good coverage rather than a date. - Cooler areas (EENY250 names Georgia and the Carolinas): activity slows in winter, egg hatch tends to follow spring warming, and spring is the best time to treat once the risk of cold has passed. Texas boards should note EENY250 reports tea scale in Texas as well. Ask your county Extension office when crawlers usually appear locally, and have the contractor check undersides with a hand lens before each spray.

Treatments in the order to use them

Pruning comes first. EENY250 says thinning camellias improves both spray coverage and air movement, and in cooler climates it recommends removing small non-flowering branches growing inside the plant between February and March. Cut out the worst-infested twigs and bag them. Then oil or soap. EENY250 prefers soaps and oils over conventional insecticides because they are usually less harmful to the parasites that help control the scale. Coverage of the leaf undersides decides whether it works, and a sticker-spreader helps. One spray is not enough: EENY250 calls for two to three applications 7 to 10 days apart, and Mississippi State recommends at least two sprays about 10 days apart. For beds that stay heavy, a soil-applied systemic. Mississippi State calls products containing dinotefuran especially useful against tea scale: applied as a drench or granules around the shrub, they act slowly but last a long time, with the rate set by shrub size. It also lists acephate and malathion as contact sprays that work on active crawlers. These are a step up from oil, so use them only where the oil program failed, and read the label's pollinator directions before anything goes on shrubs in bloom. Whatever the product, the label sets the rate, the interval and any heat limits. Ask the contractor for the label before the first application.

Put it in the contract and check the license

Lines to add to the landscape or pest control scope: - "Contractor will inspect camellias and hollies in [beds] monthly, record live scale, crawlers and parasite exit holes, and report findings to the board." - "Scale treatments will begin with pruning and horticultural oil applied to leaf undersides, repeated per label at 7 to 10 day intervals. Soil systemic products require written board approval and are limited to the beds listed in the approval." - "No applications to plants in bloom." Licensing differs by state. In Texas, Occupations Code 1951.003 treats controlling pests on trees, shrubs or other plantings next to a residence or in a park, done for pay, as structural pest control, and 1951.301(b) requires a business license. Ask for the Texas Department of Agriculture license number. In Florida, a landscape worker holding only the limited certification under Fla. Stat. 482.156(1) may treat ornamentals only with products that carry no signal word or the word "caution," using handheld or backpack equipment, never power equipment. Anything beyond that calls for a licensed pest control company. Keep license numbers and the certificate of insurance in the vendor file.

A sample year and an owner note

A Florida bed with heavy scale: - Month 1: inspect, run the squeeze test, photograph. Prune out the worst twigs and thin the interior. - Month 1 to 2: oil sprays to the undersides, three rounds 7 to 10 days apart. - Month 3: reinspect. If live scale is still widespread, the board considers a soil systemic for that bed only. - Every month after: a quick underside check during the regular service visit, with spot oil sprays where crawlers show up. - Month 12: compare new growth with last year's photos. New leaves coming in clean is the sign it is working, even while old leaves still carry dead scale. In a cooler climate, move the pruning to February or March and the first spray rounds to spring. Owners often have camellias and hollies too, and crawlers spread between plants. A short note helps: "The association is treating tea scale on the camellias and hollies at [location]. If leaves on your shrubs have yellow blotches on top and white fuzz or small brown scales underneath, your county Extension office can confirm it and suggest treatment."

Mistakes boards make

- Spraying the tops of the leaves. The scale is underneath, and a quick pass with a wand from above does almost nothing. - Paying for one spray and calling it done. Oil kills crawlers on contact, and the next batch hatches days later. - Treating a bed full of dead scale. Run the squeeze test first. - Going straight to the strongest product. It can wipe out the parasitic wasps that were helping. Our guide on controlling lace bugs on HOA azaleas uses the same soft-first order for another shrub pest. - Ignoring crowding. Dense, unpruned shrubs hold the most scale and get the worst spray coverage. - Replacing every plant at the first sign. A shrub with yellow blotches but full leaves usually recovers with steady treatment. Save replacement for plants with heavy leaf drop and dead twigs after a full season of care.

Sources

These guides are general education for HOA boards and residents, not legal, tax, or financial advice. Rules vary by state and by your community's governing documents - check with a professional for your situation.

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