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Field experiments to evaluate the split application of mesotrione + s-metolachlor, mesotrione + terbuthylazine, dicamba + prosulfuron, terbuthylazine + mesotrione + s-metolachlor, and sulcotrione in the cultivation of sorghum var. Rona 1 were carried out in 2012 and 2013. Th e fi eld tests were conducted at the fi eld experimental station in Winna Góra, Poznań, Poland. Treatments with the herbicides were performed directly aft er sowing (PE) and at leaf stage 1–2 (AE1) or at leaf stage 3–4 (AE2) of sorghum. Th e treatments were carried out in a laid randomized block design with 4 replications. Th e results showed that the tested herbicides applied at split doses were eff ective in weed control. Aft er the herbicide application weed density and weed biomass were signifi cantly reduced compared to the infested control. Th e best results were achieved aft er the application of mesotrione tank mixture with s-metolachlor and terbuthylazine. Application of split doses of herbicides was also correlated with the density, biomass, and height of sorghum.
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Pchły z gniazd Passer domesticus i Passer montanus

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In the years 1986-1988 102 nests of Passer domesticus and 113 nests of P. montanus were collected from Słupsk, Warszawa and its surrounding. Ceratophyllus gallinae was found in 55 nests of P. domesticus and in 74 nests of P. montanus: C. fringillae in 13 nests of P. domesticus. The highest mean number of C. gallinae per nest was recorded in nest of P. domesticus (11,9), lower in nest of P. montanus (5,9). The highest percentage of nests with fleas and the highest mean number of fleas per nest were recorded in September in P. domesticus and in June, July and September in P. montanus. The highest (111) nests to be inhabited by 1- 10 specimens. Number of specimens in nests was not depending on the weight nests.
In the years 1976-1989 392 nests of D. urbica and 584 nests of H. rustica were collectcd from 54 localitics in 6 Provinces in the north of Poland. The highest mean number of specimens per nest was observed in the nest of D. urbica (28.4) and the lowest in nest of H. Rustica (4.2). The highest percentage of nests of the swallows with Oe. hirundinis was recorded in December and lowest in March. The highest mean number of Oe. hirundinis per nest was in the nest of D. urbica in August and lowest in February, and in the nest of H. rustica - in September and in March respectively.
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O znaczeniu roztoczy (Acarina) w lasach

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Pasozyty zewnetrzne z gniazd jaskolek

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In the years 1989-1990 53 nests of D. urbica and 47 nests of H. rustica were collected from Resko (Province Szczecin). In 95 nests 2483 ectoparasites representig 3 species: C. hirundinis (73,1 %), Oe. hirundinis (26,5%) and C. gallinae (0,4%) were found. The highest mean number of specimens per nest was observed in the nest of D. urbica (29,5) and the lowest in nest of H. rustica (19,5). The highest (57) of nests was inhabited by 2 parasites species, 35 nests - by 1 and 3 nests - by 3 species. The highest mean number of ectoparasites per nest of D. urbica was noted in December and in nest of H. rustica- in October.
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In the year 1986-94 nests of Riparia riparia (L.) were collected from three localites (21 nests near the town of Płoty, 14 from a colony in Pomyłowo and 14 from a colony in Gwiazdowo near the town of Sławno). From 34 (63%) nests 391 specimens of 3 species (Ceratophyllus styx, Ixodes lividus and Oeciacus hirundinis) were collected. Ceratophyllus styx was the dominanting species. It inhabited 32 (59.2%) nests. The highest percentage of nests with ectoparasites and the highest mean number of ectoparasites per nest were recorded in October. The highest mean number of C. styx was observed in the nests in October and the highest mean number of I. lividus - in September. The highest number of nests (28) proved to be inhabited by 1 parasite species.
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