Why short-term bioassays are not meaningful - effects of persistent (Cd) vs. biodegradable (imidacloprid) chemicals on pea aphid (Acyrthosiphon pisum Harris)

Contents

Why short-term bioassays are not meaningful - effects of persistent (Cd) vs. biodegradable (imidacloprid) chemicals on pea aphid (Acyrthosiphon pisum Harris)

Ecotoxicological tests(Leon & van Gestel, 1994)

Why use short-term bioassays?

Ecotoxicological tests and life spanof test organisms

Why not use short-term bioassays?

Accumulation of toxic chemicals (P. Kramarz, unpublished - see poster)

Including effects other than decrease in survival or fecundity(after Laskowski & Hopkin, 1996)

10th day-truncated LTRE for pea aphids:imidacloprid (g a.i./ha)

20th day-truncated LTRE for pea aphids:imidacloprid (g a.i./ha)

Full LTRE for pea aphids:imidacloprid (g a.i./ha)

10th day-truncated LTRE for pea aphids:cadmium (mg/kg)

20th day-truncated LTRE for pea aphids:cadmium (mg/kg)

Full LTRE for pea aphids:cadmium (mg/kg)

Number of juvenile aphids in all experiments

Effect on fitness - Mann-Whitney teston medians (treatment vs. control)

Conclusions

Thank you!

Adres e-mail: uxlaskow@cyf-kr.edu.pl

Main page: www.cyf-kr.edu.pl/~uxlaskow

Inne informacje:
Presentation given on the International Conference on Ecotoxicology and Environmental Safety, SECOTOX'98, Antalya, Turkey, 19-21 Oct. 1998.