During the 2001/2002 growing season, winter barley fields suffered severe damage in many different parts of the country. It has been estimated that of the 218,000 hectares sown in autumn 2001, nearly 13,500 hectares had to be ploughed out. This was caused mainly by viral epidemics. Viral infections resulted in considerable economic losses. Viral diseases have been reported more and more frequently in recent years. Over the last thirty years, barley yellow dwarf virus (BYDV) caused the greatest damage, while wheat dwarf virus (WDV) has been detected with ever greater frequency since the mid-nineties. These observations are confirmed by the most recent data. The appearance and intense multiplication of WDV was principally responsible for the epidemic in 2002. Among samples exhibiting symptoms of leaf yellowing and dwarfness 91.1% of the plants were found to be infected with WDV, 76.1% alone and the rest in combination with other viruses. The BYDV group was detected alone in 0.4% of the samples and in 13.2% in combination with WDV. Cereal yellow dwarf virus (CYDV) was isolated alone in 0.4% of the samples and combined with WDV in 2.2%. Substantial differences were observed between the cereal species. Among the plants exhibiting symptoms suggesting virus infection, the proportion of virus hosts ranged from 76% in oats to 100% in winter barley. Wheat dwarf virus was dominant on all the virus species, the proportion ranging from 60% in spring durum to 88% in triticale. Only one virus was isolated from oats and 6 from winter wheat. Four viruses or virus combinations were detected on winter barley. Since winter barley suffered the greatest losses from virus attacks it is worth mentioning here that 100% of the winter barley plants exhibiting symptoms proved to be virus-infected, 72% of them with WDV. No plants were infected with BYDV alone, but 20% were infected with BYDV-MAV and WDV, and 6% with BYDV-PAV and WDV.
|Translated title of the contribution||Viral diseases of cereals in 2002|
|Number of pages||7|
|Publication status||Published - Feb 1 2003|
ASJC Scopus subject areas
- Agronomy and Crop Science