Occurrence of root rot of sugar beet cultivars
2004
Piszczek, J. (Institute of Plant Protection, Poznan (Poland). Regional Experimental Station, Torun), E-mail: [email protected]
Serious losses caused by root rot of sugar beet were observed in Poland in 2001-02. The disease occurred in most of regions of sugar beet cropping from June to the end of growing season. Very high losses of yield were observed on many fields especially on cultivar Lolita in 2001.The aim of this work was to detect the casual agent of root rot (2001) and to compare susceptibility of sugar beet cultivars to this disease (2002-03). The laboratory tests (2001) showed that most of destroyed roots were infected by Aphanomyces cochlioides Drechsler. This species is very well known as a pathogen of sugar beet seedling damping-off in Poland. The fungus Rhizoctonia solani Kühn was found only in 12 percent of rotten roots collected in south-eastern part of Poland. In field trails the highest number of infected roots and the highest infection index were found for cultivar Arthur (2002-03). That cultivar was significantly more susceptible to root rot than the rest of tested cultivars
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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