Cactus and succulents

Prickly Pear Encounters: Removing Glochids

A typical prickly pear cactus (Opuntia dillenii). The wicked-looking long spines are not all you have to worry about! Photo: fbcdn.net

Opuntias (Opuntia spp.), popular indoor or outdoor cactus (depending on the species and your local climate) with mostly flattened segments, and often called prickly pears or beavertail cactus, are unusual among cacti in that they produce two types of spines. Long, fierce, painful ones that dig into the skin, draw blood and yelps and are very visible and, on the cushiony areole at the base of the vicious spines, tiny hairlike, barbed spines called glochids. 

Opuntia glochids
These tiny, fuzzy, almost caressable spines are actually glochids, particularly nasty spines that break off and penetrate the skin. Photo: jinjian liang, flickr.com

While the long, nasty spines stay on the plant, glochids break off readily and work their way into the skin, causing itching and irritation that can, in sensitive individuals, last days, weeks or even months. You rarely recall actually running into glochids, as they seem harmless. But if you get any on your skin, the resulting rash is one you’ll likely remember for a long time.

Removing Glochids

Fingers with glochids attached
Ouch! Glochids are hard to remove. Photo: Marianne Skov Jensen, ezpixels.com

Ideally, you’d only wear thick, long-sleeved gloves or use tongs when handling any prickly pear, but in case glochids do get to you, remove them quickly before they work their way into your skin. 

Glue and gauze being applied to skin.
First, tweezer off most of the glochids, then apply glue and gauze. Photo: healthxchange.sg

Believe it or not, how to remove glochids has actually been scientifically studied and the most effective method is to first go over the area with eyebrow tweezers, pulling off the most visible clumps of spines. Then cover the skin in the affected area with a thin layer of household glue (Elmer’s glue, for example), then lightly press gauze into the glue. Allow the glue to dry for about 30 minutes, then peel it off. According to this study, this will result in removing 95% of the glochids.

Other popular methods are less effective. Some people apply facial mask and pull them off that way. Others use sticky tape (duct tape, for example), softly pressing the tape over the affected sector, then yanking it off. But both methods left more of than half of the spines in the skin.

Once they’ve worked their way into your skin, though, you pretty much have to wait until your body reacts, causing dermatitis then pustules, then eventually expelling them.

My best advice is: admire your opuntias from a distance. They’re not a plant you’ll want to hug!

Larry Hodgson is one of Canada’s best-known garden communicators. After studies at the University of Toronto and Laval University where he obtained his B.A. in modern languages in 1978, he succeeded in combining his language skills with his passion for gardening in a novel career as a garden writer and lecturer. He has notably been editor-in-chief of HousePlant Magazine, Fleurs, Plantes et Jardins, À Fleur de Pot and Houseplant Forum magazines and is currently the garden correspondent for Le Soleil and radio garden commentator for CKIA-FM Radio. He is a regular contributor to and horticultural consultant for Fleurs, Plantes, Jardins garden magazine and has written for many other garden publications in both the United States and Canada, including Canadian Gardening, Harrowsmith, Horticulture, Fine Gardening, Rebecca’s Garden and Organic Gardening. He also speaks frequently to horticultural groups throughout Canada and the U.S. His book credits include The Garden Lover’s Guide to Canada, Complete Guide to Houseplants, Making the Most of Shade, Perennials for Every Purpose, Annuals for Every Purpose, and Houseplants for Dummies, as well as nearly 50 other titles in English and French. He can be seen in Quebec on French-language television and was notably a regular collaborator for 7 years on the TV shows Fleurs et Jardins and Salut Bonjour Weekend. He is the President of the Garden Writers Association Foundation and the winner of the prestigious 2006 Garden Media Promoter Award offered by the Perennial Plant Association. An avid proponent of garden tourism, he has lead garden tours throughout Canada and to the gardens of over 30 countries over the last 30 years. He presently resides in Quebec City, Quebec.

1 comment on “Prickly Pear Encounters: Removing Glochids

  1. Oh my, how simple; glue (NOT super glue) or tape. I never had much of a problem with them, so never investigated options for removal.

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