Desert Rose (Adenium) Flower Spots: Insect Damage and Prevention

Desert rose shows tiny brown lesions on flower base. Owner seeks cause and prevention. Plant otherwise gorgeous with abundant foliage.

Diagnosis: Thrips or Stink Bug Feeding

• Thrips: Microscopic, rasp flower tissue, cause browning/scurfing
• Stink bugs: Pierce flowers, inject enzymes, suck juices—leave corky spots
• Timing: Damage occurred 1-2 weeks ago; insects gone

Why It's Minor

• Only few flowers affected
• Foliage healthy, abundant
• No spreading symptoms
• Cosmetic only—plant vigor excellent

Orange Oil as Broad Prevention

Orange oil (d-limonene) products show repellent efficacy against:

• Thrips, aphids, whiteflies
• Ants, cockroaches, fire ants
• Some caterpillars, beetles

Application: Spray on/around plants per label. Avoid ferns (sensitive). Smells wonderful. Reapply after rain.

Desert Rose Care Reminders

• Full sun, excellent drainage
• Water deeply, dry completely between
• Fertilize: low N, high P (bloom booster)
• Protect from cold (<50°F)

Minor flower spotting on otherwise thriving Adenium = normal gardening. Orange oil may reduce future visits.