Vol. 10, Special Issue 6 (2021)

Author(s):
Suchismita Balabantaray and SMA Mandal

Abstract:
The pupae of Trichogramma japonicum were stored at five cold storage temperatures (5, 7.5, 10, 12.5 and 15 °C) for nine storage durations (5, 10, 15, 20, 25, 30, 35, 40 and 45 days) in incubators. The adult emergence (%) from stored pupae and host (Corcyra cephalonica Stainton) egg parasitization by the emerged adult parasitoid were studied under standard laboratory conditions. The adult emergence of 93.07% was found to be the maximum at 7.5 °C stored for 5 days. The emergence gradually decreased with the increase in duration. After 30 and 45 days of storage the emergences were reduced to 76.48% and 52.50%, respectively. The parasitization of 91.56% was found to be the maximum at 7.5 °C stored for 5 days. The parasitization rates were gradually reduced with the increase in storage duration and reached to 71.74% and 54.58% at 30 and 45 days after storage, respectively. The next best temperature was 10 °C followed by 5 °C. The higher temperatures viz., 12.5 °C and 15 °C were found unsuitable for the storage of Trichogramma japonicum pupae.