Relative Susceptibility of Prunus mahaleb L. and Prunus cerasifera EHRH. Rootstocks Against Verticillium Wilt

The aim of the study was to evaluate the susceptibility of Prunus cerasifera L. rootstocks to Verticillium wilt and investigate the virulence of Hungarian Verticillium dahliae Kleb. isolates. P. cerasifera plants were inoculated by stem puncture method with four V. dahliae isolates from different host plants (VD1=sea buckthorn, VD2=sweet cherry, VD3=sour cherry, VD4=sycamore maple). The examined plants were seedlings of Myrobalan C.162 rootstock. 20 plants per isolate were inoculated with conidial suspension of the pathogen. The inoculum density was ~1 x 107 conidia per centimeter cubed. Control plants were treated with sterile distilled water. External and internal symptoms of the disease were assessed on a weekly basis for 10 weeks on scales from 0 to 4 and 0 to 2, respectively. External symptom severity (ESS), internal symptom severity (ISS) and the area under disease progress curve with reference to the maximum value (RAUDPC) were calculated during the experiment. VD3 isolate caused severe symptoms (RAUDPC=41%), VD1 and VD4 isolates caused moderate symptoms (RAUDPC=28%) while VD2 isolate caused mild symptoms (RAUDPC=8%) on inoculated plants. Differences in virulence between isolates were observed during the experiment. Isolates collected from stone fruits species (VD2 and VD3) showed significant difference in all disease values, therefore no correlation was found between virulence and the origin of isolates. According to our results the four Hungarian V. dahliae isolates showed different virulence levels on P. cerasifera seedlings.

Publications

Book of Abstracts

63rd Conference of Plant Protection, Budapest. ISSN 0231 2956 (In Hungarian) Published: 10-03-2017

Details

Activity type

Publication in scientific journal (peer review)

Activity work package

Secure sustainable fruit production

Activity number

NARIC-WP5-A12

Activity contact

Ferenc Izsepi
NARIC Fruitculture Research Institute
Budapest
Park u. 2
1223
Hungary
[email protected]

Activity partner

NARIC

Activity country

Hungary

Last edit

18-07-2017