SOME BIOLOGICAL PROPERTIES OF TRISSOLCUS SEMISTRIATUS NEES (HYMENOPTERA: SCELIONIDAE) ADULTS STORED AT DIFFERENT TEMPERATURES

M. Islamoglu, S. Tarla

Abstract: The purpose of this study is to evaluate the suitable storage temperature and duration for an important egg parasitoid Trissolcus semistriatus Nees (Hymenoptera: Scelionidae). Adults of the parasitoid used in these experiments were obtained from 26 ± 1°C and were then stored at 6, 9, 12, and 15ºC from 1 to 6 months. Survival rates, longevity, oviposition period, lifetime fecundity, female progeny and sex ratio of T. semistriatus were determined under the laboratory conditions. The results of this study showed that the highest rate of vitality was obtained in the first month of storage at all temperatures; and the lowest rate of vitality was obtained in the sixth month of storage. Depending on the storage temperature, the average longevity of the T. semistriatus adult changed, the longest longevity of 16.7 ± 1.28 days belonged to control individuals. The lowest longevity of 9.5 ± 1.51 days belonged to the adult individuals stored at 15°C. The longest oviposition period was calculated as 12.7 ± 1.00 days for control and the lowest oviposition period was calculated as 7.2 ± 1.16 days for T. semistriatus stored at 9°C. Lifetime fecundity of T. semistriatus stored at various temperatures were 49.8 ± 6.56 at 9°C, 57.7 ± 5.77 at 12°C and 53.6 ± 6.92 at 15°C, and was 89.0 ± 5.46 for control. The highest sex ratio was 73.0 ± 0.90 for control; the lowest was 62.4 ± 0.87 for females stored at 15°C.

Keywords: fecundity; storage; sunn pest; temperature; Trissolcus semistriatus

Date published: 2019-01-17