The generation time of Lobesia botrana (Den. & Schiff.) was estimated as the number of day‐degrees required between the start of a flight and the start of the following flight in two regions in northern Greece. The day‐degrees required for the first generation (x=339.3, Naoussa; x=275.6, Thessaloniki) were significantly shorter than for the second (x=751.5, Naoussa; x=833.8, Thessaloniki) and the third generations (x=899.5, Naoussa; x=1197.0, Thessaloniki). Nonlinear models were developed using trap catches of male L. botrana during 1987–1989 for predicting its flight activity. A lower threshold temperature of 6.45°C was used in calculating daily day‐degrees from 1 March. The models predicted with sufficient accuracy the accumulated male moth catch and they accounted for the 60–78% and 86–91% of year‐to‐year variation in male flight activity in Thessaloniki and Naoussa, respectively.

Trapping experiments were conducted during the period of flight activity of the cherry fruit fly Rhagoletis cerasi L. in the area of Thessaloniki, northern Greece, during the years 1993-1997 to test several traps alone and in combination with different food attractants. Yellow sticky-coated visual traps were more effective than McPhail-type traps baited with different food attractants. Of the visual traps, the most effective was the yellow Rebell trap. The Rebell trap, provided with a dispenser containing a slow release formulation of ammonium acetate attached to the lower part of the trap, was found to be the most effective of all treatments tested, capturing approximately 50% more R. cerasi flies than the Rebell trap without any attractant. Ammonium carbonate dispensers did not increase the performance of Rebell traps. More mature females were captured in Rebell traps baited with or without ammonium acetate than in McPhail-type traps baited with ammonium acetate. This study demonstrates that Rebell traps baited with an ammonium acetate dispenser can provide a more effective tool for monitoring and mass trapping of R. cerasi than the currently used unbaited Rebell traps.

No abstract

No abstract

No abstract