40-Year-Old Ponytail Palm with Mealybugs: To Behead or Not?

Question

My 40-year-old Beaucarnea recurvata (ponytail palm) has had mealybugs for years. Tried systemic poison (dislike, prefer organic) and alcohol spray/Q-tips. Infestation very bad again—considering removing all foliage (one leaf set) to eradicate bugs. Can a 40+ year plant with 40+" stem withstand such severe treatment? Wait until spring?

Answer

Hi Gale, pruning off the top is dicey—may or may not lead to new growth. But it won't solve the mealybug problem.

Mealybugs are persistent, requiring thorough treatment. They're also symptomatic of plant stress: inadequate light, oversized pot, or improper watering.

Mature ponytails should never be repotted. If repotted in past couple years, likely suffering from overwatering/root rot. Proper potting: pot diameter no more than 1" wider than bulb width. Water only when soil dry halfway down pot. Need lots of bright indirect light all day + some direct sun daily—very close to sunny uncovered window.

First, correct pot size, watering, or light deficiencies. Then thoroughly spray with 5 parts water, 1 part isopropyl alcohol, squirt of liquid soap. Cover all surfaces until dripping wet—missing any allows survival/reproduction. Q-tip application wastes time. Healthy plants resist future pests.

I've written articles on ponytail care and plant pests I'll email free to anyone requesting at wcreed@HorticulturalHelp.com.

Will Creed, Interior Landscaper
Horticultural Help, NYC