Possible storage of Coccinella undecimpunctata (Col., Coccinellidae) under low temperature and its effect on some biological characteristics

Developmental stages of Coccinella undecimpunctata L. were stored at 6.0 degrees C for various storage periods in a refrigerator. Egg hatching was 65.0% after 7 days of storage. However, no egg hatching were observed after 15, 30, 45 and 60 days of storage. The survival of the third and fourth instar larvae was higher than the first and second instar. The survival of larvae declined sharply after 15 days. No larvae survived after 30 or 60 days of storage. Emergence percentage of adults from stored pupae varied from 85.0 to 25.0% after storage for 7 up to 30 days. The survival percentage of adults differed and appeared to depend on prior feeding before storage. From the present results, it appears that the adult stage may be better able to survive extended periods of storage than the other developmental stages. In addition, it was found that prior feeding of adult stage affected the longevity, fecundity and consumption rate.