The problem is that the seeds are devoured by rats, and the high protein content causes a massive explosion in rat population. The rats devour all the crops, leading to famines, unrest, and rebellions.
From the article:
"The flowering of the bamboo is a cyclical phenomenon called mautam (bamboo death in the Mizo language) that occurs every 48 years or so. Mautams in 1862 and 1911 were followed by severe famines in Mizoram.
The impact of the mautam in 1958-59 did not end with famine. It redefined Mizo politics, triggered an insurgency and culminated in a redrawing of boundaries in the region.
At the time of the 1958-59 mautam, Mizoram was still a part of the state of Assam. The administration in Shillong (then capital of Assam) laughed off the threat posed by the rats. It failed to grasp the severity of the famine in the Mizo Hills and the gravity of the crisis it had triggered.
Activists of the Mizo National Famine Front (MNFF), which was working among villagers to provide relief, were enraged by the government's apathy. They turned to armed struggle against the Indian state to express that rage.
The MNFF became the Mizo National Front (MNF) and spearheaded a secessionist movement. The insurgency raged for over two decades and ended in 1986 with the signing of a peace accord. The MNF bid farewell to arms and the federal government granted full statehood to Mizoram in 1987.
Memories of the 1958 mautam and the bloody insurgency that ravaged the Mizo Hills remain alive to date. Mizoram's present Chief Minister, Zoramthanga, would not have forgotten the role of mautam in prompting thousands of Mizos to pick up arms and wage war against the Indian state. After all, he was one of them. Zoramthanga was number two in the MNF hierarchy during the insurgency years." [...]
And that, ladies and gentlemen, is how the fate of governments can hang on the flowering cycle of a certain species of bamboo.