Comparative examination of light and pheromone trappings in the case of H.armigera

What is it about?

Monitoring the flight of Helicoverpa armigera (Lepidoptera: Noctuidae) by means of pheromone and light trapping are generally accepted and widely used methods. In the present study the catch data of 335 Hungarian light traps have been examined and compared to the field-observed results originated from light and pheromone traps in the quest of exploring potential differences in observation methods. There were obvious discrepancies in registered flight patterns between light and pheromone trap catches. In early summer, individuals of the migrant generation of H. armigera were not caught by Hungarian light traps. The recorded parameters in light and pheromone traps have revealed significant differences as shown by the Student t-values used for comparing the data. This phenomenon can be explained by the physiological features of H. armigera, the females (being heliophile) of the early, migrant generations which have more vitelline-cells in their ovaries.

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