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In the present, the second part of the series titled “Beetles (Coleoptera) of the Rogów region” presents a family of ladybirds (Coccinellidae), as one of the better-known families of beetles occurring in the Rogów area. The faunistic data of presented species enriched by bionomical informations. In addition, the study showed a new species of ladybird for the Polish fauna and it is Nephus (B.) bisignatus (Boh.).
The Australian members of the coccinellid tribe Chilocorini are revised, keyed and illustrated. Chilocorini in Australia consists of 23 species classified in 6 genera: Brumoides, Chilocorus, Exochomus, Halmus, Orcus and Trichorcus. Five new species are described: Brumoides piae, Chilocorus maculatus, Chilocorus micros, Halmus hilli and Halmus viridis. The following new synonyms are proposed: Chilocorus malasiae Crotch, 1874 (= Chilocorus australasiae Gadeau de Kerville, 1884; = Chilocorus baileyi Blackburn, 1890; = Chilocorus flavidus Blackburn, 1892b; = Chilocorus diadema Weise, 1898; = Chilocorus meijerei Weise, 1913; = Chilocorus nasicornis Korschefsky, 1944); Orcus coelestris Blackburn, 1891 (= Orcus ovalis Blackburn, 1892b; = Orcus splendens Blackburn, 1892b; = Orcus clypeatus Weise;1923); Orcus citri Lea, 1902 (= Orcus coxalis Weise, 1917); Orcus cyanocephalus Mulsant, 1850 (= Orcus lecanii Blackburn, 1895; = Orcus purpureocinctus Lea, 1902); Orcus punctulatus Blackburn, 1892b (= O. beneficus Weise, 1913). Parapriasus Chapin, 1965 is also considered as a synonym of Orcus Mulsant, 1850. Lectotypes are designated for: Chilocorus australasiae Gadeau de Kerville, 1884; Ch. baileyi Blackburn, 1890; Ch. ñavidus Blackburn, 1892b; Halmus cupripennis Weise, 1923; Orcus beneficus Weise, 1913; Orcus coelestris Blackburn, 1891; Orcus citri Lea, 1902; Orcus clypeatus Weise, 1923; Orcus coxalis Weise, 1917; Orcus evelynensis Weise, 1923; Orcus lecanii Blackburn, 1895; Orcus ovalis Blackburn, 1892b; Orcus punctulatus Blackburn, 1892b, Orcus purpureotinctus Lea, 1902; Orcus quadrimaculatus Gadeau de Kerville, 1884 and Orcus splendens Blackburn, 1892b.
Urbanised areas are capable of exerting a strong impact on the distribution of genetic diversity within populations of animals. Urban invertebrate species are currently either relicts from pre-urban ecosystems, or have immigrated during or following urbanisation. We analysed 10 microsatellite loci in 196 specimens of the harlequin ladybird (Harmonia axyridis), an invasive species in Poland sampled in three of the country’s cities. Of Asiatic origin, this ladybird has been spreading through other continents, including Europe. Results showed that the Polish cities are being invaded by harlequin ladybirds that are uniform in terms of their genetic pool, with no significant genetic differentiation present between the urban populations investigated. Rapid spread and what are probably the large numbers of individuals colonising new areas allow this species to maintain high genetic diversity and avoid bottleneck effects. However, we suggest that urban populations differ in terms of genetic diversity. The highest genetic diversity characterises the most recently invaded area of Olsztyn in the north of Poland. Genetic data further suggest that this population could be still in an expansion phase. The earliest colonising population in Wrocław exhibits signs of a Wahlund effect, suggesting that gene flow among local groups within this urban area could be disturbed or impaired. We conclude that, in the case of an urban population of the harlequin ladybird, successful colonisation is followed by the onset of a decline in genetic diversity, with isolation between local sampling sites appearing. Further studies are required, however, if this process is to be elucidated.
Harmonia axyridis (PALL.), a very expansive species of ladybird beetle, for the first time has been recorded from Poland. Two localities in Wielkopolska-Kujawy Lowland are given.
In the years 1995-1997, studies were carried out on the occurrence of aphids and ladybirds on winter wheat in the south-eastern Poland. Depending on the atmospheric conditions the first aphids on wheat plantations were found from decade II of May. The peak of their mass occurrence was recorded in decads II and III of June. The first overwintering beetles ladybirds began their flight over the plantations from decade III of April till decade II of May. The peak of a mass occurrence of these beetles was noted in decades II and III of May. In all the localities and years of the studies the peak of a mass occurrence of beetles of ladybirds always preceded the mass occurrence of aphids on winter wheat.
Two important lady beetle species commonly found in alfalfa fields in Iran are the variegated lady beetle Hippodamia variegata Goeze and the seven spotted lady beetle Coccinella septempunctata (Linnaeus, 1758) (Coleoptera: Coccinellidae). These two species attack many aphid species including the pea aphid, Acyrthosiphon pisum (Harris) (Hemiptera: Aphididae). In this study, the seasonal population changes of A. pisum, H. variegata, C. septempunctata and the parasitoid, Dinocampus coccinellae (Schrank) (Hymenoptera: Braconidae) were studied in alfalfa fields in the 2012 and 2013 seasonal periods. The highest ladybird densities were noted on July 5, 2012 and on September 6, 2013 (17.2±2.8 and 13.4±1.6) individuals per 20 sweeps, respectively. Parasitism rates by D. coccinellae ranged from approximately 3 to 6% in two subsequent years, respectively. Parasitism was higher early in the growing season. Most parasitised ladybirds were females. There was no significant relationship between the temperature and relative humidity with pea aphid populations, although the aphid populations declined during the hot summer period. In contrast, the relationship between temperature and the H. variegata population was significant and positive in both years of the study. It has been shown that these lady beetle species have a major role in reducing the pea aphid populations in alfalfa fields. Due to the relatively low percentage of field parasitism by D. coccinellae, this parasite might not reduce the biocontrol efficiency of lady beetle species.
New faunistic records concerning 45 species of the family Coccinellidae in Poland are given. The occurrence of Scymnus femoralis (Gyllenhall), previously reported from Poland without a precise locality, is confirmed on the basis of new findings from four regions.
The species richness and relative abundances of ladybird beetles (Coleoptera: Coccinellidae) were surveyed in 2014-2015 in Cedynia Landscape Park (NW Poland). In total, 50 species were found, of which the most common was the invasive Harmonia axyridis (PALLAS, 1773). Some of the species recorded in this study, such as Hyperaspis concolor (SUFFRIAN, 1843), Clitostethus arcuatus (ROSSI, 1794), Nephus bipunctatus (KUGELANN, 1794), N. quadrimaculatus (HERBST, 1783), Scymnus ater KUGELANN, 1794, S. limbatus STEPHENS, 1832, Novius cruentatus (MULSANT, 1846) and Cynegetis impunctata (LINNAEUS, 1767), have very rarely been reported in Poland.
Przedmiotem badań byly drapieżce mszyc; biedronki (Coccinellidae), bzygowate (Syrphidae) i złotooki(Chrysopidae). Badania prowadzono w makroregionie olsztyńskim w latach 1984-1990. Obiektami badawczymi byly pola uprawne: roślin motylkowatych (lucerna, koniczyna, groch, bobik, peluszka), zbożowych (żyto, pszenica, jęczmień, owies), okopowych (ziemniak, burak) i przemysłowych (rzepak). Obserwacjami objęto również siedliska nieuprawne: łąki trwale, nieużytki trawiaste, zadrzewienia śródpolne i ich sąsiedztwo. Wykazano, że w badanym zespole drapieżców najważniejszą rolę odgrywają bzygowate z gatunkami dominującymi Sphareophoria scripta (L.), Episyrphus balteatus (Deg.) i subdominującym Melanostoma mellinum (L.) oraz biedronki z gatunkiem dominującym Coccinella septempunctata (L.) i subdominującym Propylea quatuordecimpunctata (L.), w mniejszym stopniu złotooki z gatunkami dominującymi Chrysoperla carnea Steph. i Chrysopa phyllochroma Wesm. W badanym makroregionie największe nasilenie dorosłych drapieżców wystąpiło od połowy lipca do potowy sierpnia. Wykazano, że wśród upraw rolniczych najlepszym siedliskiem dla afidofagów są plantacje lucerny i inne uprawy motylkowate. Miejscami ostojowymi dla drapieżców mszyc są łąki trwałe, nieużytki trawiaste, zadrzewienia śródpolne i ich sąsiedztwo.
The species richness and densities of overwintering ladybird beetles (Coleoptera: Coccinellidae) were studied in the municipality of Łomianki in the suburban zone of Warsaw (Central Poland). In total, 274 specimens of 25 species were found, of which the most common was Psyllobora vigintiduopunctata (41.9% of all specimens). Other frequently recorded ladybirds were Exochomus quadripustulatus, Propylea quatuordecimpunctata and Vibidia duodecimguttata. Several of the species registered in this study (Rhyzobius litura, Hyperaspis concolor, Scymnus femoralis, Scymnus interruptus, Adalia conglomerata) have rarely been reported in Poland.
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