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EN
Results of the investigations of Psychidae (Lepidoptera) of the Łódź Upland were presented. In total 15 species (41.7% of fauna of our country) were found. Their distribution was analysed.
EN
In the present paper some information on the potencial of the epidemiology hazard produced by community of hornet Vespa crabro is given. In nests of hornet recorded in Łódź, 24 species of pathogenic and conditional pathogenic bacteria were found. 75% of nests investigated in Łódź were found in apartament buildings.
EN
Results of the investigations of toxicity properties of some social Aculeata venoms were presented. The action of crude venoms of six aculeate species: Apis mellifera, Bomhus sp., Vespa crabro, Vespula germanica, Vespula vulgaris, Polistes sp. on human erythrocytes, larvas of Calliphora sp. and new-born Mus musculus was investigated in order to determine the hemolytic potency and complete toxicity of different aculeate venoms. Hemolityc potency was defined by quantity of free hemoglobin released under the influence of venom. Investigations were realized for concentrating different of venoms and different time of incubation. The complete toxicity of venoms there was determined by toxical value DL₅₀ (dosis lethaly). Aculeate venoms to appear as a strong toxical substances and their composition and function depend on constitution and function of the aculeate venom apparatus.
EN
Preliminary results of investigation on the distribution of nests of the hornet within the area of Łódź in 1998 and 1999 are given. 25 nests in 1998 and only 8 nests in 1999 was found (8 8% of nests was found in buildings).
EN
Based on author’s own studies and information on the all collections fenology of the adult stages appearance of bag moths (Lepidoptera, Psychidae) in Poland is given.
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