Help me treat a pest or disease on my plant.

Plant: {{plant}}
What I see: {{symptoms}} (insects visible, spots, webbing, sticky residue, holes, color change)
How widespread it is: {{spread}}
Indoor / outdoor: {{location}}
Other plants nearby that I want to protect: {{other_plants}}

Return:
1. Likely identification — top 2 candidates and how to tell them apart
2. The biology — why this pest / disease shows up here
3. Organic / DIY treatment options first (neem oil, soap spray, isolation)
4. Chemical options if needed, with what to look for in a product
5. Treatment schedule — how often, for how long
6. Recovery signs — when to know it's working
7. Quarantine plan to protect nearby plants
8. Long-term prevention — why this happened and how to avoid recurrence