kvalitet
Vol.55 - Izbis
Vol.55 - Izbis
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Chaenomeles japonica and Cotoneaster horizontalis 87<br />
Zaštita bilja UDK 634-235<br />
Vol. 55 (1-4), No 247-250, 87-96, 2004<br />
Naučni rad<br />
Beograd<br />
CHAENOMELES JAPONICA AND COTONEASTER HORIZONTALIS<br />
NEW HOSTS OF ERWINIA AMYLOVORA IN SERBIA<br />
JELICA BALAŽ, ALEKSANDRA SMILJANIĆ<br />
Department for Environmental and Plant Protection,<br />
Faculty of Agriculture,University of Novi Sad,<br />
Trg Dositeja Obradovica 8, Serbia<br />
E-mail: balazjel@polj.ns.ac.yu<br />
Erwinia amylovora was registred on two ornamental plants – Chaenomeles japonica<br />
and Cotoneaster horizontalis for the first time in Serbia in 2000. Both species were grown<br />
nearlby of the apple orchards in which fireblight severity was epiphytotic because of high<br />
temperatures during flowering period of apple.<br />
Key words: Erwinia amylovora, hosts, Chaenomeles japonica, Cotoneaster horizontalis,<br />
antibiotics<br />
INTRODUCTION<br />
For more than one decade bacterial Fire Blight (Erwinia amylovora) has<br />
spreaded through out the territory of Serbia. This quarantine pathogen was initially<br />
established on pear, quince and apple in 1990. Next year it was found on medlar<br />
(Mespilus germanica) and hawthorn (Crategus sp.) (Panić and Arsenijević,<br />
1996). Later on, Fire Blight occurred on ornamental plants: on fire thorn in 1997<br />
(Pyracantha coccinea) (Gavrilovic and Arsenijevic, 1998), and on Chaenomeles<br />
japonica and Cotoneaster horizontalis in 2000 (Balaž Jelica, 2000; Balaž Jelica<br />
et al., 2004 ).<br />
The most endangered species are quince and pear trees in Serbia. The apple<br />
trees were highly infected only in some years, such was 2000 when appearence of<br />
Fire Blight had been epyphytotic. The outbreak occurrence on apple blossoms was<br />
favored by high temperatures during flowering period. Due to the high infectious