To freeze or not to freeze...read the facts and decide for yourself.
Microscopic Lasioderma Serricorne (Tobacco Beetle) eggs exist in tobacco and foods alike. While Tobacco Beetles can be found in environments exceeding 65˚F, they typically only hatch and mate in temperature conditions of 68-73˚F, with high humidity > 60%.
Of the four stages the beetle grows in and out of (egg, larva, pupa, adult), the Pupa stage is undoubtedly the most devastating for smokers. Emerging from the egg, approximately six to ten days after the temperature triggers their birth; the larvae live and feed off of your cigars, for roughly five to ten weeks. They prefer to reside in dark or dimly lit cracks, nooks and crevices but become active and fly readily in bright, open areas, probably in an attempt to find refuge. They are most active at dusk and will continue activity through the night. Adults do not feed, but will drink liquids.
The complete life cycle takes 26 days at 98°F and 120 days at 68°F. L. Serricorne do not do well in the cold, adults die within 6 days at 39°F, and eggs survive 5 days at 32-41°F. Larvae become dormant and may hibernate below 60° F. Adults are strong fliers, and are particularly active in subdued light at temperatures above 65° F. Adults will cease all flying activity at 55°F. Temperatures of 1˚F or lower will crack the larvae and kill both eggs and adults. Heating small quantities of infested material in an oven (190°F for one hour, 120°F for 16 to 24 hours) also is effective.
References
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• Howe RW. 1957. A laboratory study of the cigarette beetle, Lasioderma serricorne (F.)(Col., Anobiidae) with a critical review of the literature on its biology. Bulletin of Entomological Research 48: 9-56.
• Krischik V, Burkholder W. 1995. Stored-product insects and biological control agents. pp. 85-102. In Krischik, V., G. Cuperus, and D. Galiart (eds.) Stored product management. Oklahoma Cooperative Extension Service Circular Number E-912.
• Phillips TW. 1994. Pheromones of stored-product insects: current status and future perspectives. pp. 479-486. In E. Highley, E. J. Wright, H. J. Banks and B. R. Champ (eds.), Proceedings of the 6th International Working Conference on Stored-product Protection, Vol. 1. CAB International, Wallingford, U.K.
• Phillips TW, Berberet RC, Cuperus GW. 2000. Postharvest integrated pest management, pp. 2690-2701. In F. J. Francis (ed.), The Wiley Encyclopedia of Food Science Technology, 2nd Edition. John Wiley and Sons, New York.
• Phillips TW, Cogan PM, Fadamiro HY. 2000. Pheromones, pp. 273-302. In B. Subramanyam & D. W. Hagstrum (eds.), Alternatives to pesticides in stored-product IPM. Kluwer Academic Publishers, Boston.
• United States Department of Agriculture. 1980. Stored-grain insects. USDA-ARS Agriculture Handbook Number 500, 57 pp.
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