Acanthocalycium spiniflorum · Succulent
Mealybugs: Isolate the plant and dab infested areas with a cotton bud soaked in methylated spirits.
Root rot: Ensure excellent drainage with gritty compost and withhold water during winter dormancy.
Vine weevil: Use nematode treatments in the soil or apply a systemic insecticide as a preventive measure.
Scale insects: Scrape off visible scales and treat with a horticultural oil spray during warmer months.
Sunburn: Gradually acclimatise the plant to brighter conditions before moving it into full sun.