Controlling Mealybugs and Scale on Houseplants: A Non-Toxic Approach

Controlling Mealybugs and Scale on Houseplants: A Non-Toxic Approach

Sudden infestations after a move are common—pests often exist at low, undetectable levels until favorable conditions trigger a population explosion. The tree from the previous owner may have been the source, but the exact origin matters less than immediate treatment.

Universal Spray for Mealybugs and Scale

Both pests are closely related and succumb to the same contact spray:

Mix: 5 parts water, 1 part 70% rubbing alcohol, a squirt of liquid dish soap.

Application Rules

1. Spray until every leaf and stem surface is dripping wet. Missed spots = survivors = reinfestation.
2. Do it outdoors or in a shower—it's messy.
3. One thorough treatment often suffices. Monitor weekly; repeat if any appear.

Long‑Term Prevention

• Quarantine new plants 2–3 weeks.
• Inspect regularly, especially leaf axils and undersides.
• Keep plants healthy—stress attracts pests.

There's no permanent "pest‑free" guarantee, but vigilance and this safe spray keep populations under control.