Home – Home – Jornals – Contemporary Problems of Ecology 2003 number 1

Results of studies of flavonoids content of leaves of hawthorn affected by powdery mildue are presented. It has been noted that at the initial stage of affection, a response reaction is induced: the flavonoid content is increased, especially in the leave tissues adjacent to the site of invasion. Exogenous introduction of flavonoids decreases the frequency of development of powdery mildew.