A swarm of stink bugs and a river of rats: why India’s flowering bamboo causes a crisis for humans
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- Melocanna baccifera and Bambusa tulda bamboo began mass flowering across Mizoram's forests in late 2025, unleashing a 48-50 year cycle in which the resulting seeds fuel a rodent breeding surge before rats spill into farmland
- More than 5,300 farmers across Mizoram have been affected, with rice suffering the highest losses alongside maize, ginger, pumpkin and beans, according to the state agriculture department
- Farmer Maunsanga in Mamit district harvested just 3 bags of rice this year versus his usual 30-40, saying it was "not enough even for my own family"
- The state government has deployed rodent control teams distributing zinc phosphide and bromadiolone, though village council member Vanlalruata in Hriphaw said some residents refuse the chemicals over fears of stream and drinking-water contamination
- Communities have returned to traditional bamboo traps called vaithang and chepthang, catching dozens of rats nightly — though farmer Lalhriliana said "the numbers are still very high"
- Post-flowering bamboo die-off increases the risk of soil erosion and slope instability during monsoon months, warned Dr R Zoramthanga of Pachhunga University College, who called it "an ecosystem shift"
- A similar 1958-60 famine in Mizoram was linked to the same bamboo phenomenon, and Prof Lalrinmawia of Mizoram University said long-term planning and preparedness have "remained inconsistent" across generations
Why it matters: Over 5,300 Mizoram farmers face rice harvests collapsing to a fraction of normal — Maunsanga went from 30-40 bags to 3 — as a 48-50 year bamboo flowering cycle drives a rodent surge the state is now scrambling to control with rodenticides that some villagers refuse to use near water sources. The crisis also strips hillsides of bamboo, raising monsoon landslide and soil-erosion risk across the region.
