Abstract
ABSTRACTA survey of Lymantria dispar L. (Lepidoptera: Lymantriidae) was carried out in Northern Greece. Five treatments (including control) were applied: Metaflumizone 24%, Teflubenzuron 15%, and biological factors such as Bacillus thuringirensis and the entomopathogenic nematode Steinernema carpocapsae. The results showed that the above mentioned biological factors can be used successfully enough in controlling L. dispar Particularly the entomopathogenic nematode S. carpocapsae, which was used for the first time in Greece against L. dispar, has a great potential as a control agent against this pest, since its performance could be improved by admixture of polyhedrosis viruses. In addition to this comparative analysis, the genetic variation between two populations from Northern Greece was assessed for the first time, in order to detect possible implications during the application of control measures. Intraspecific variation remained very low, which could be attributed to the high dispersal rate of the gypsy moth, in concert with the continuous distribution range due to the large number of potential host plants. Consequently, control measures could be applied uniformly since intraspecific diversity could not account for a “population-based” application of control agents.
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