scale insects on Pachycereus Pringlei
Quick answer
If your Pachycereus Pringlei has scale insects, the most likely cause is: Scale insects that settle on Pachycereus pringlei are small, round or oblong sap-feeders that cling tightly to the stem surface, most commonly white, brown or reddish in colour, and they have an immense ability to multiply so that a small patch of scale bugs on a plant one day might cover an entire leaf or stem a week later; on a ribbed columnar cactus they tuck into the grooves between the areoles where they are hard to spot.
Start here:
- 1. Direct a strong jet of water along the ribs of the stem and into the grooves between ribs so the scale shields are physically dislodged, then repeat every few days until no live insects remain.
- 2. Treat a heavy outbreak on Pachycereus pringlei with a systemic insecticide applied at the label rate, or use a contact spray plus a wetting agent such as dishwashing liquid so the poison sticks to the insects, while isolating the infested plant so the crawlers cannot walk onto neighbouring cacti.
Why Pachycereus Pringlei gets scale insects
Pachycereus Pringlei
Scale insects that settle on Pachycereus pringlei are small, round or oblong sap-feeders that cling tightly to the stem surface, most commonly white, brown or reddish in colour, and they have an immense ability to multiply so that a small patch of scale bugs on a plant one day might cover an entire leaf or stem a week later; on a ribbed columnar cactus they tuck into the grooves between the areoles where they are hard to spot.
How to reverse scale insects on Pachycereus Pringlei
- 1
Direct a strong jet of water along the ribs of the stem and into the grooves between ribs so the scale shields are physically dislodged, then repeat every few days until no live insects remain.
- 2
Treat a heavy outbreak on Pachycereus pringlei with a systemic insecticide applied at the label rate, or use a contact spray plus a wetting agent such as dishwashing liquid so the poison sticks to the insects, while isolating the infested plant so the crawlers cannot walk onto neighbouring cacti.
Keep scale insects off this Pachycereus Pringlei
Inspect new columnar cacti for scales before placing them next to Pachycereus pringlei, keep plants well-grown and never environmentally stressed, and remove heavily infested ribs early so the colony never reaches the stage where it can cover an entire stem within a week.