A toxicity assessment for the anostracan Thamnocephalus
platyurus and the fish, trout (Oncorhynchus mykiss)
and tilapia (Oreochromis niloticus), exposed to the insecticide
Lannate and its main substance methomyl was conducted
based on LC50 estimation. The bioindicators were
exposed to Lannate concentrations of 0.1-10 mg/l (Thamnocephalus
platyurus) and 1.5-15 mg/l (fish). The crustacean
was also exposed to concentrations of 0.01mg/l -
1mg/l of methomyl.
The results define that the LC50 values for Lannate
were 3.73 mg/l for the trout (Oncorhynchus mykiss), 1.89
mg/l for the tilapia (Oreochromis niloticus) and 0.12 mg/l
for the Thamnocephalus platyurus. The LC50 values for
methomyl, which was tested only with Thamnocephalus
platyurus was 0.13 mg/l. These values classify both substances
from "very toxic" to "exceptionally toxic".
Among the test organisms used, Thamnocephalus
platyurus is appointed as a particularly sensitive and easily
applicable bioindicator, especially in research on the completed
management of rural products, in order to minimize
the environmental problems by the sustainable use of plantprotection
products.