Pest identification
What's eating my goat's horn cactus?
Mealybugs
Signs: White cottony wax tangled in the long curly spines or in rib grooves, yellowing and reduced blooming
Control: Use a fine paintbrush dipped in isopropyl alcohol to reach under twisted spines; neem oil spray; repeat weekly
Scale insects
Signs: Hard bumps at the base of spines or on the ribbed body, particularly visible after spines are removed
Control: Remove with a toothbrush and alcohol; apply horticultural oil spray; inspect monthly
Spider mites
Signs: Fine webbing around spine clusters, stippling on the body between ribs
Control: Neem oil or miticide spray every 5–7 days; ensure good air circulation and avoid extreme dryness
Keep goat's horn cactus pest-free
Healthy plants resist pests best. Get the basics right:
Goat's Horn Cactus pests — FAQ
What is eating my goat's horn cactus?
Goat's Horn Cactus (Astrophytum capricorne) has long, twisted spines that can trap debris and conceal pests. As a flowering houseplant, mealybugs are the main threat, hiding at the base of spines and in rib grooves. Scale insects and spider mites also occur indoors. When summered outside for flowering, aphids may appear on buds. Inspect under and between spines carefully.
How do I get rid of mealybugs on goat's horn cactus?
White cottony wax tangled in the long curly spines or in rib grooves, yellowing and reduced blooming Use a fine paintbrush dipped in isopropyl alcohol to reach under twisted spines; neem oil spray; repeat weekly
How do I get rid of scale insects on goat's horn cactus?
Hard bumps at the base of spines or on the ribbed body, particularly visible after spines are removed Remove with a toothbrush and alcohol; apply horticultural oil spray; inspect monthly
How do I get rid of spider mites on goat's horn cactus?
Fine webbing around spine clusters, stippling on the body between ribs Neem oil or miticide spray every 5–7 days; ensure good air circulation and avoid extreme dryness