There are several case studies in the field of Botany that require knowledge of economic aspects for the UPSC Botany optional subject. These case studies explore the economic impact of various botanical aspects, such as agriculture, medicinal plants, and forestry. Here are some examples:

1. Economic impact of agricultural practices:
- Sustainable agriculture: This case study examines the economic benefits of sustainable agricultural practices, such as organic farming, crop rotation, and integrated pest management. It analyzes the cost-effectiveness and profitability of these practices compared to conventional methods.
- Genetically modified crops: This case study explores the economic implications of genetically modified (GM) crops, including their impact on crop yields, farmer incomes, and the environment. It assesses the pros and cons of GM crops from an economic standpoint.

2. Economic potential of medicinal plants:
- Medicinal plant cultivation: This case study investigates the economic feasibility of cultivating medicinal plants for commercial purposes. It analyzes the costs involved in cultivation, processing, and marketing, along with the potential returns and market demand for medicinal plant products.
- Traditional medicine and herbal industries: This case study focuses on the economic contributions of traditional medicine and herbal industries. It assesses the market value of herbal products, the employment opportunities generated, and the potential for sustainable economic growth in this sector.

3. Economic aspects of forestry:
- Forest management and conservation: This case study examines the economic benefits of sustainable forest management and conservation practices. It analyzes the value of ecosystem services provided by forests, such as carbon sequestration, water regulation, and biodiversity conservation.
- Non-timber forest products: This case study explores the economic potential of non-timber forest products, such as fruits, nuts, resins, and medicinal plants. It assesses the market value, resource sustainability, and livelihood opportunities associated with these products.

In conclusion, the field of Botany offers several case studies that require an understanding of economic aspects. These case studies explore the economic impact of agricultural practices, medicinal plants, and forestry, providing insights into the cost-effectiveness, market potential, and sustainability of various botanical aspects.