We have recently harvested arecanuts from my farm in Malnad (Western Ghats) region of Karnataka. The nuts appeared healthy on the outside with no holes, decay. However, when they were cut open, the nuts seemed to have decayed. I could not see any worm/ organism. And I am pretty sure the decay is not consistent with the well known rot/ wilt that occurs during monsoons.
We did spray the regular amounts of Bourdeaux mixture during monsoons and the trees do not appear diseased in any way. Also, none of my neighboring farms have observed this problem. We do not spray or use any other insecticide/ fertilizer other than the Bourdeaux mixture to prevent rot.
Pics attached. Let me know if anyone else on this forum has experienced this problem and if you have a solution. Almost 20% of my produce is affected.