reckless wrote:Cant find a clear answer but it seems most species is 2-4 years for dormant eggs
wiki - adults die within 6 days at 4 °C, and eggs survive 5 days at 0–5 °C.
Somebody shared a scientific research journal studying tobacco beetles on another forum, wish I'd saved it.
But iirc that's about right, eggs and live beetles can last a few days at warmer temps (above freezing, 40F) but as the temps go below freezing, 0F to -20F their viability is zero at 24hrs or less.