Agave macroacantha · Succulent
Scale insects: Isolate the plant and treat infested areas with a cotton bud dipped in methylated spirits or apply horticultural oil.
Root rot: Ensure well-draining cactus compost and avoid watering during winter dormancy to keep roots dry.
Mealybugs: Wipe away visible insects with a damp cloth or alcohol swab and spray with insecticidal soap if severe.
Vine weevil: Use nematode treatments in the soil during warm months or apply a systemic insecticide as a preventive measure.