| Tartalmi leírás: |
The investigations were induced by the controversial question of the generation number of European corn borer (Ostrinia nubilalis HUBNER) in Hungary. Relying on the data of nation-wide light trap network surveys were made in three places in south area of Hungary (Fadd, Kecel, Kiskunfelegyhaza) in previous years maize fields left unharvested, by cutting 4x100 infested stalks to settle the question of a second flight peak. Beside the mentioned places 4x80 stalks were cut in current year maize fields in order to determine the larval stages. The examinations were carried out between 6 and 8 August in accordance with the second flight peak.
In the previous year's stalks dead larvae and chrysales were found without exception, while the examination results of current year's stalks confirmed the development of a second (first summer) generation in this area. It is thus regarded as a fact supported by the data of the national light trap system that in South-East Hungary a true second generation has for years been developing.
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