Two formulations of methyl anthranilate (MA), one (ReJex-iTTM TP-40 [TP-401) containing a
surfactant, the other (ReJex-iTTM AP-50 [AP-501) a miscible, free-flowing powder, effectively repelled
captive mallards (Anus plutyrhynchos) from pools of water in pen tests, and/or free-ranging gulls (Larus
deluwurensis and L. urgentutus) from pools of water in field trials for 4-11 days. With one exception, pool
entries and bill contacts with water were reduced (p G 0.02) in pools treated with both formulations
compared with untreated pools. Overall gull activity was reduced (p 6 0.01) when all available water was
treated with AP-50. Effectiveness of TP-40 (v/v) was similar to the previously reported effectiveness of
powdered formulations where MA concentrations were 1.6-3.0 times (g/g) greater, a consequence of the
surfactant concentrating MA at the surface. These tests indicate that MA-based formulations might have
utility at airports and perhaps other locations where it is desirable to reduce bird activity in temporary
Two formulations of methyl anthranilate (MA), one (ReJex-iTTM TP-40 [TP-401) containing asurfactant, the other (ReJex-iTTM AP-50 [AP-501) a miscible, free-flowing powder, effectively repelledcaptive mallards (Anus plutyrhynchos) from pools of water in pen tests, and/or free-ranging gulls (Larusdeluwurensis and L. urgentutus) from pools of water in field trials for 4-11 days. With one exception, poolentries and bill contacts with water were reduced (p G 0.02) in pools treated with both formulationscompared with untreated pools. Overall gull activity was reduced (p 6 0.01) when all available water wastreated with AP-50. Effectiveness of TP-40 (v/v) was similar to the previously reported effectiveness ofpowdered formulations where MA concentrations were 1.6-3.0 times (g/g) greater, a consequence of thesurfactant concentrating MA at the surface. These tests indicate that MA-based formulations might haveutility at airports and perhaps other locations where it is desirable to reduce bird activity in temporary
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