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A 24-h test was conducted using Avena sp. to determine potential phytotoxic effects of the test substance benzonitrile. The laboratory experiments were conducted in petri dishes, the test substance was applied on the coleoptile of Avena sp. plants at a concentration of 1 x 10^-4 M.

Benzonitrile had no effects on the size of the coleoptile of Avena sp. at this concentration after 24 h.