Mammillaria bocasana · Succulent
Root rot: Ensure excellent drainage with gritty compost and water sparingly, allowing the soil to dry completely between waterings.
Mealybugs: Isolate the plant and treat with a systemic insecticide or dab spots with alcohol-soaked cotton wool.
Vine weevil: Use nematode treatments in the soil during warm months or apply a systemic insecticide as a preventative measure.
Scale insects: Scrape off visible scales and spray with horticultural oil or a recommended insecticide.
Sunburn: Gradually acclimatise plants to brighter conditions and provide shade during peak summer sunlight.