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Mycotoxicology quality of oat
PEJSAROVÁ, Hana
The aim of this work was comparison of ten varieties of oat, grown from 2009 to 2012 on the experimental plot of the University of South Bohemia in České Budějovice and obtain knowledge about the influence of factors (variety, season and pre-crop) on the mycotoxicological quality of oats. The presence of fungal pathogens, mainly from the genus Fusarium, and the level of selected mycotoxins (HT-2 and T-2 toxin, deoxynivalenol, nivalenol and D3G) were observed on four naked varieties and six hulled varieties. The susceptibility of individual varieties to infestation, the level of individual mycotoxins in the grain, the growth characteristics of oats evaluated during vegetation and the parameters of technological quality were compared.
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Monitoring of occurrence and characterization of entomopathogenic fungi naturally associated with population of spruce bark beetle \kur{Ips typographus} L. (Coleoptera, Scolytidae).
PEJSAROVÁ, Hana
The use of entomopathogenic organisms is one of the possibilities of biological plant protection, which now prefers the protection of the chemical. In the field of scientific research with an interest in these organisms in recent years has increased significantly, particularly on the grounds that their use can avoid increasing the doses of chemicals that have harmful organisms after a period of vypěstují resistance. In any ecosystem are harmful agents and their natural enemies. By the monitoring Šumava NP and PLA we wanted to demonstrate the occurrence of entomopathogenic fungi, the natural enemies of insects. Specific harmful factor for us was spruce bark beetle. Using the location of occurrence of entomopathogenic fungi were obtained strains of several species (Beauveria spp., Isaria spp., Metarhizium spp. Lecanicillium spp.), Which attempts were made, determining the entomopathogenic potential. Rating strains was carried out by setting radial growth and yield of spores of these strains of entomopathogenic fungi. Strains were transferred to the testing carried out forms alginate pellets and stored in mycology collections in the Department of crop production for the purpose of further examination. The monitoring and follow-up experiments we gained valuable information about the current incidence of fungi in the environment and also data on the assumptions for the use of integrated plant protection. For further research have been used identified fungi Beauveria bassiana strains, which, according to the findings apply to most pathogenic sponge against lýkožroutu smrkovému and its most productive strains (NP 0030, NP 0052) are currently recommended for use in the biological fight against spruce bark beetle. The remaining species found entomopathogenic fungi are the subject of further examination at the Department of Plant Production University of South Bohemia.
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