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Influence of cultivar and hot water treatment on development of choosen pathogens of onion
Skoumalová, Tereza ; Koudela, Martin (advisor) ; Čeněk, Čeněk (referee)
The target of the work was verificated the varietal differences in varietal resistance onion Allium cepa L. to pathogens onion neck rot Botrytis aclada and pathogens mildew onion Peronospora destructor and verificated the effect of the seed treatment with hot water to reduce choosen pathogens of onion neck rot Botrytis aclada and mildew onion Peronospora destructor.
Seed were sown to bowls with sand and destilled water. Bowls were place in growth chambers. For experiments with varietal resistance were used cultivar onion: Alice, Amfora F1, Avalon, Bolero F1, Grenada, Karmen, Tosca, Triumf F1 and Všetana. For experiments with hot watre treatment were used cultivar onion: Alice, Amfora F1, Unico F1 and Tandem. Growth chambre had ideal climate by method firm Moravoseed s. r. o. and seed germination was evaluented by method ISTA International Seed Testing Association. Experiments were evalueter by modified method by Pawelec et al. (2006).
The results demonstrated the exists between coultivar differences the resistence onion to selected pathogens. The most resistence cultivar onion were Bolero F1, Karmen, Všetana and Triumf F1 againts the pathogens onion neck rot Botrytis aclada and cultivar onion Alice, Avalon, Bolero F1 and Tosca againts the pathogens mildew onion Peronospora destructor.
The result demonstrated the effect of seed treatment with hot water to select pathogens hadn´t signification efect. Hot water treatment about 50 °C for 20 minuts for seeds onion can´t reduce infect onion neck rot Botrytis aclada and infect mildew onion Peronospora destructor.
For cultivar onion Amfora F1 was observed treatment effect, but results were inconclusive.
Growing varieties with better resistence to the phytopathogenic fungy, could be after verifying higher resistence in multi-experiment, important preventive tool for regulating presence of such diseases when growing onions.
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