Marcin Kozak

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Eriophyoid species belonging to the genus Trisetacus are economically important as pests of conifers. A narrow host specialization to conifers and some unique morphological characteristics have made these mites interesting subjects for scientific inquiry. In this study, we assessed morphological and genetic variation of seven Trisetacus species originating(More)
Did the demise of the Soviet Union in 1991 influence the scientific performance of the researchers in Eastern European countries? Did this historical event affect international collaboration by researchers from the Eastern European countries with those of Western countries? Did it also change international collaboration among researchers from the Eastern(More)
The aim of the paper was to determine the infestation parameters and species composition of eriophyoid mites for different parts of Norway spruce and Scots pine as well as for different age groups of the trees. The observations on the occurrence of the mites were conducted in 2004 and 2005 in 4 locations distributed in various regions of Poland, accounting(More)
The present research aimed to evaluate the effect of silver nitrate (AgNO3) on sex modification in sweet gourd (Momordica cochinchinensis Spreng.), and to explore the possibility of sexual crossing between two genetically female plants. Spray applications of AgNO3 on 30 days’ old female plants induced hermaphrodite flowers. Male plants were insensitive to(More)
Selection of parental lines is important in plant breeding programmes. Marker-assisted selection is an alternative to classical selection methods, which are expensive and time consuming. Marker-assisted selection aims to find molecular markers that are linked to genes that determine quantitative traits of interest. Classical statistical methods require(More)
Beak and feather disease virus- (BFDV-) positive (naturally infected) but clinically healthy budgerigars (Melopsittacus undulatus) were inoculated with two isolates of Mycobacterium avium subsp. avium isolated from naturally infected golden pheasant (Chrysolophus pictus) and peafowl (Pavo cristatus). During a period of more than two months after(More)
The aim of the present study was to determine the susceptibility of budgerigars (Melopsittacus undulatus) to infections with different Mycobacterium species. For inoculations the following Mycobacterium species were used: Mycobacterium avium subsp. avium, Mycobacterium bovis subsp. bovis, Mycobacterium tuberculosis subsp. tuberculosis, Mycobacterium(More)