Why does your Mammillaria geminispina have sticky leaves? Diagnose the cause and fix it with our step-by-step guide.
Scale insects attach themselves to the cactus body and suck sap, excreting 'honeydew,' a sticky substance that coats the plant. This is common in Mammillaria species when humidity or airflow is low.
Mealybugs are common pests for cacti that produce a sticky residue and often hide in the crevices between the clustered offsets of the Mammillaria.
Aphids pierce the cactus tissue to feed on nutrients, resulting in the secretion of honeydew that makes the surface feel tacky.
While not the cause of stickiness itself, sooty mold is a dark fungus that grows specifically on the honeydew left behind by sap-sucking insects.
Your plant might also be experiencing one of these issues:
English
Italiano
