RT Journal Article
SR Electronic
A1 Šafránková, Ivana
A1 Müller, Jiří
T1 The occurence of Peronospora radii de Bary on Argyranthemum frutescens (L.) Schultz-Bip. in the Czech Republic
JF Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis
YR 2014
VO 55
IS 1
SP 205
OP 210
DO 10.11118/actaun200755010205
UL https://acta.mendelu.cz/artkey/acu-200701-0021.php
AB Marguerite daisy (Argyranthemum frutescens) is an ornamental plant, that is used as a potted and landscape plant. In 2006, disease symptoms were observed on marguerite daisy (A. frutescens cv. 'Butterfly') in greenhouses in Brno-Tuřany. The pathogen primarily affected newly expanded young leaves and shoot tips. They were chlorotic, twisted and stunted. The affected leaf tips were necrotic. Bud flowers and flowers were deformed and get dry. The extensive purplish brown growth of downy mildew colonized the lower surface of infected leaves. Older leaves were unaffected.