After being retained in cold storage at -10°C over a 24-month period, some Clostera inclusa
(Hubner) eggs were still able to be successfully parasitized by Ooencyrtus ennomophagus Yoshimoto, an egg parasite. An equation was developed for predicting parasite yield over time from cold-stored eggs. Predicted parasitism was 25 percent or better for up to 8 months of storage, then dropped to below 16 percent for eggs stored 12 months, 8 percent after 18 months, declining to less than 1 percent after 24 months of storage.
Drooz, A.T.; Solomon, J.D. 1984. Temporal Cold Storage of Eggs of the Poplar Tent Maker, Clostera inclusa, Prior to Use in Rearing the Egg Parasite, Ooencyrfus ennomophagus. Res. Note SO-304. New Orleans, LA: U.S. Department of Agriculture, Forest Service, Southern Forest Experiment Station. 2 p.