Table 1: The state of D. veneta vermin populations in oil- contaminated soils after 22 weeks of incubation.

Sample No. Survival % Total population pcs. Total productivity cocoons/container Individual productivity cocoons/species
1. Control 100 33 ± 0.98 3.4 ± 0.05 1.5 ± 0.01
2. Microbiological preparation 100 95 ± 2.05 15.4 ± 0.12 2.1 ± 0.01
3. Soil with oil concentration 20 g/kg 100 93 ± 2.02 15.3 ± 0.11 15.3 ± 0.11
4. Soil with oil concentration 20 g/kg and biopreparation 100 114 ± 2.34 13.4 ± 0.09 1.24 ± 0.02
5. Soil with oil concentration 40 g/kg 80 73 ± 1.74 10.7 ± 0.09 1.72 ± 0.02
6. Soil with oil concentration 40 g/kg and biopreparation 80 40 ± 0.97 6.8 ± 0.05 0.8 ± 0.01
7. Soil with oil concentration 60 g/kg 0 0 0 0
8. Soil contaminated with oil 60 g/kg and biopreparation 70 20 ± 0.51 3.2 ± 0.02 0.5 ± 0.01
9. Soil with oil concentration 80 g/kg 0 0 0 0
10. Soil with oil concentration 80 g/kg and biopreparation 60 20 ± 0.51 2.4 ± 0.02 0.3 ± 0.01
11. Soil with oil concentration 100 g/kg 0 0 0 0
12. Soil with oil concentration 100 g/kg and biopreparation 60 24 ± 0.56 2.5 ± 0.02 0.27 ± 0.01