Pest identification
What's eating my haage's cactus?
Mealybugs
Signs: White cottony wax hidden under and between dense spines; honeydew deposits; slow or absent growth
Control: Dab each cluster with alcohol-soaked cotton swabs; follow with a full neem oil spray application; repeat every 10–14 days
Scale insects
Signs: Hard raised bumps on ribs and areoles, brown or grey; surrounding tissue yellows or pits over time
Control: Dislodge with a toothbrush; treat with horticultural oil or neem oil spray applied carefully around spine clusters
Spider mites
Signs: Fine webbing visible between spines; dull, greyish tinge to normally bright green or brown-tipped skin
Control: Rinse plant outdoors; apply insecticidal soap spray and repeat after seven days; improve room humidity in winter
Keep haage's cactus pest-free
Healthy plants resist pests best. Get the basics right:
Haage's Cactus pests — FAQ
What is eating my haage's cactus?
Haage's Cactus (Haageocereus acranthus) is a ribbed columnar houseplant cactus primarily threatened by mealybugs hiding among its dense spines and areoles. Scale and spider mites also occur in dry indoor conditions. Dense spine coverage makes visual inspection difficult — use a magnifying glass and check the base of spines carefully.
How do I get rid of mealybugs on haage's cactus?
White cottony wax hidden under and between dense spines; honeydew deposits; slow or absent growth Dab each cluster with alcohol-soaked cotton swabs; follow with a full neem oil spray application; repeat every 10–14 days
How do I get rid of scale insects on haage's cactus?
Hard raised bumps on ribs and areoles, brown or grey; surrounding tissue yellows or pits over time Dislodge with a toothbrush; treat with horticultural oil or neem oil spray applied carefully around spine clusters
How do I get rid of spider mites on haage's cactus?
Fine webbing visible between spines; dull, greyish tinge to normally bright green or brown-tipped skin Rinse plant outdoors; apply insecticidal soap spray and repeat after seven days; improve room humidity in winter