that TCP had a greater influence on production than on consumption. As a result
of having let match document investigations, a similar tendency was shown in the
mesocosm examination, and there was a close association found in the final
examination.
2. Environmental assessment of carbendazim, a fungicide. The most susceptible
creature, water fleas; ECOSAR classes, imidazoles and carbamate esters. In both
systems, it was at approximately one that the P/R ratio stably fluctuated, but, after
recovery following attenuation in the 10 mg/L addition system, the amplitude
increased with the addition of 20 mg/L (Fig. 12.5). The m-NOEC of the Benrate
hydration agent was estimated as ~20 mg/L. Because a Benrate hydration agent is
the main product of carbendazim and is composed primarily of ~50% benomyl,
and the benomyl is converted into carbendazim with a 2-hour half-life in water,
the m-NOEC of the carbendazim is thought to be ~10 mg/L.
3. Environmental assessment of chlorpyrifos, an insecticide. The most susceptible
creature, water fleas; ECOSAR classes, esters and monothiophosphates. There
ю
ю
ю
ю
ю
ю
Fig. 12.3 Flowchart of
microcosm test for
environmental impact risk
assessment
0
3
6
9
0
3
6
9
0
9
18
27
control
1 mg/L
influence
10 mg/L
influence
Respiration (mgO 2 /L)
Production (mgO
2 /L)
Fig. 12.4 Time course of P/R ratio in TCP added microcosm
12 Further Perspectives
205