The effect of atrazine, 2,4-D, methoxychlor, carbaryl and diazinon on the growth of planktonic algae

Abstract

The effect of various concentrations of atrazine, 2,4-D (butoxy ethanol ester), methoxychlor, carbaryl and diazinon on the growth of 36 isolates of planktonic algae was studied. No genera toxicity of methoxychlor near saturating concentrations (0·01 p.p.m.) was demonstrated. The butoxy ethanol ester of 2,4-D was toxic to some test organisms at a concentration of 4 p.p.m. Atrazine inhibited growth generally at 1 p.p.m. and higher, and diazinon and carbaryl were toxic at concentrations of 10 and 25 p.p.m.