[Control of Monomorium pharaonis using a methoprene bait in the Berlin Zoo and its combined application with a residue insecticide in the Olomouc Children's Clinic].

The control of Monomorium pharaonis by a methoprene bait in the Tierpark Berlin and its combined application with a residue insecticide in the children's hospital in Olomouc. In two different institutions heavy infestations with the Pharaoh's ant (Monomorium pharaonis L.) could be eradicated with a methoprene bait applied by different methods. In a zoological garden the bait was continuously exposed in boxes for many weeks. The dosage was about 2.5 g/10 m2, and 1.42 kg of DYBH-bait were used. On average 50% of this amount was taken off by the ants during the eradication period of 14...37 weeks. In a children's hospital after spraying permethrin 10 weeks before the bait was exposed uncovered with 0.5 g per bait station. Within 13 days an area of 9,000 m2 was treated with about 1.8 kg of DYBH-bait. 131/2 weeks after the beginning of the application no more ants could be detected by visual checking. Further checking with baited traps after 128 days confirmed eradication. The bait was very persistent being still attractive and effective after an exposition of about 8 months.