yarsagumba season in nepals karnali set for late may but yields are thinning and risks rising

The article reports declining yields of yarsagumba (caterpillar fungus) in Nepal, a high-value medicinal product. The commercial mechanism is a supply shortage (declining yields) against sustained high prices, but the impact is local and weak for global markets. The primary affected product is yarsagumba itself; no clear margin squeeze or expansion for specific companies is identified. The channel is supply_shortage, but the magnitude is small and localized to Nepal's Karnali region. No historical parallels or broader sector impacts are evident beyond local agriculture and Nepal's economy.