Exposure Conc (mg/L)

Alteration

Polymorphic Nuclei

Vessel congestion

Vacuolization

Mild Necrosis

Severe Necrosis

14 day

28 day

14 day

28 day

14 day

28 day

14 day

28 day

14 day

28 day

14 day

28 day

Control

1.0 mg/L

50.0 mg/L

100.0 mg/L

500 mg/L

1000.0 mg/L

No

No

No

No

Yes

Yes

No

No

No

Yes

Yes

Yes

Abs

Abs

Abs

Abs

Pres

Pres

Abs

Abs

Abs

Abs

Pres

Pres

Abs

Abs

Abs

Abs

Pres

Pres

Abs

Abs

Abs

Abs

Pres

Pres

Abs

Abs

Abs

Abs

Pres

Pres

Abs

Abs

Abs

Pres

Pres

Pres

Abs

Abs

Abs

Abs

Pres

Pres

Abs

Abs

Abs

Pres

Pres

Pres

Abs

Abs

Abs

Abs

Pres

Pres

Abs

Abs

Abs

Abs

Pres

Pres