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Table 1 Effects of different cold storage periods of Sitotroga cerealella eggs at − 20 °C on Trichogramma evanescens parasitism, emergence rate, and sex ratio

From: Cold storage and gamma irradiation of Sitotroga cerealella Olivier eggs (Lepidoptera: Gelechiidae) in relation to the success of parasitism by Trichogramma evanescens Westwood (Hymenoptera: Trichogrammatidae)

Storage (hour)No. of exposed eggs (mean ± S.E)% of parasitism% of emergenceSex-ratio (% of females)
Control4286.00 ± 0.3397.10 ± 0.10a97.50 ± 0.07a97.70 ± 0.33a
1/2 h.3556.66 ± 0.3521.50 ± 0.85b80.40 ± 0.33b87.30 ± 0.33b
1 h.3553.33 ± 0.5818.54 ± 0.58b67.50 ± 0.80c86.33 ± 0.88b
2 h.3307.33 ± 0.5810.55 ± 0.85c63.10 ± 0.11c85.33 ± 0.33b
P 0.00000.00000.0000
F820.0053251.363718118
df111111
  1. a, b, & c: There is no significant difference (P > 0.05) between any two means, within the same column have the same superscript letter.