An unknown microorganism occurring in a predaceous mite Phytoseiulus persimilis was described by the author in 1977 as a new species Rickettsiella phytoseiuli. Some new results on the relation between this agent and its hosts are presented in this paper.
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Natural enemies of mass-reared predatory mites (family Phytoseiidae) used for biological pest control.
Exp Appl Acarol
December 2008
Department of Biology, Saint Mary's University, 923 Robie Street, Halifax, NS, Canada.
Predatory mites of the family Phytoseiidae are valued natural enemies that provide effective pest control in greenhouses and on agricultural crops. Mass-reared phytoseiids are occasionally associated with microorganisms and although their effects are not always apparent, some are pathogenic and reduce host fitness. Invertebrate pathogens are encountered more frequently in mass production systems than in nature because rearing environments often cause overcrowding and other stresses that favour pathogen transmission and increase an individual's susceptibility to disease.
View Article and Find Full Text PDFUse of partially engorged female ticks as laboratory animals in microbiological research.
Med Vet Entomol
April 1994
Institute of Virology, Slovak Academy of Sciences, Bratislava.
Partially engorged female ticks were used as laboratory animals in microbiological research. The ticks, which were inoculated intracoelomally, became a convenient substrate for the detection of viruses, rickettsiae and protozoal parasites. This research concerned the isolation of newly recovered micro-organisms, the study of development, structure and distribution of microbial agents in ticks, and the study of their interaction with other pathogens or symbionts during mixed infection in a tick body.
View Article and Find Full Text PDFPhenomenon of Rickettsiella phytoseiuli in Phytoseiulus persimilis mite.
Acta Microbiol Immunol Hung
March 1995
Institute of Experimental Phytopathology and Entomology, Slovak Academy of Sciences, Ivanka pri Dunaji.
An unknown microorganism occurring in a predaceous mite Phytoseiulus persimilis was described by the author in 1977 as a new species Rickettsiella phytoseiuli. Some new results on the relation between this agent and its hosts are presented in this paper.
View Article and Find Full Text PDFThe work presents data on growing Rickettsiella phytoseiuli in the SM IMV-72 medium which is used for cultivation of phytopathogenic mycoplasmas. Rickettsiella was observed till the 66th day in the primary cultures and till the 16th day after the first passage. Binary division of the cells has been found only in the primary cultures; a complex cycle of the Rickettsiella development ceased at the stage of formation of the crystal-forming cells.
View Article and Find Full Text PDFUltrastructure of Rickettsiella phytoseiuli (R.p.) multiplying in female ticks Dermacentor reticulatus was compared with that of Coxiella burnetii (C.
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