Naslov
Weeds as an inoculum source of Sclerotinia sclerotiorum

Autori
Vrandečić, Karolina ; Ćosić, Jasenka ; Jurković, Draženka ; Duvnjak, Tomislav

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Lectures and papers presented at the 6th Slovenian Conference on Plant Protection / Maček, Jože - Ljubljana : Društvo za varstvo rastlin Slovenije, 2003, 101-106

Skup
6th Slovenian Conference on Plant Protection

Mjesto i datum
Zreče, Slovenija, 04.03.2003. - 06.03.2003

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Domaća recenzija

Ključne riječi
isolates pathogenicity ; S. sclerotiorum ; weeds

Sažetak
Numerous weed species could be alternative hosts for diseases of cultivated plants, among which fungi play an important role (Anikster 1982, Jenkinson and Parry 1994, Roy at all. 1994, 1997). Velvetleaf (Abutilon theophrasti Medik.), ragweed (Ambrosia artemisiifolia L.) and rough cocklebur (Xanthium strumarium L.) are very aggressive weeds in arable crops such as soybean, sunflower, maize and sugar beet. Velvetleaf, ragweed and rough cocklebur plants infected with Sclerotinia sclerotiorum (Lib.) de Bary (Sclerotinia stem rot, white mold) were recorded on several locations in eastern Croatia during 2001 and 2002. Symptoms on velvetleaf plants occured on basal stem parts as well as on upper plant parts, fruits and seeds. Symptoms of white mold on ragweed and rough cocklebur plants occured only on stems. Isolates of S. sclerotiorum from diseased weed plants were used as inoculum sources for pathogenicity tests on soybean and sunflower. Pathogenicity tests were done in laboratory and field conditions. Inoculated plants were examined daily to record development of lesions, wilting and lodging. On sunflower plants first lesions in field and laboratoy were recorded on the second day after inoculation with isolates from velvetleaf and ragweed and on the thrid day after inoculation with isolate from rough cocklebur. On soybean plants first symptoms in laboratory were recorded on the second day and in the field on the fourth day after inoculation with isolates from velvetleaf and ragweed. First lesions on soybean after field inoculation with isolate from rough cocklebur was recorded on the third day. Total number of lodging plants showed that all examined isolates were more pathogenic on sunflower than on soybean. Occurence of white mold in velvetleaf, ragweed and rough cocklebur can increase inoculum density of S. sclerotiorum in soil.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA