Winter oilseed rape as a likely source and reservoir of beet western yellows virus
1992
Polak, J. (Vyzkumny Ustav Rostlinne Vyroby, Prague-Ruzyne (CSFR))
The occurrence of beet western yellows virus (BWYV) was screened in winter oilseed rape at twenty localities in Northern Moravia by ELISA. BWYV could not be detected in oilseed rape seedlings in late August, but was detected in oilseed rape at seven localities out of 16 examined in mid November. Next spring, BWYV was detected in oilseed rape at six localities out 11 examined, and in weeds growing in oilseed rape (but not in oilseed rape) at three localities. Among weeds present in winter oilseed rape crops, BWYV was detected by ELISA in creeping thistle, yarrow milfoil, nugwort common confrey, scentless mayweed, hoary cress, ivy-leaved speedwell, speedwell, and common dandelion plants. Our results show the usefulness of investigations aimed at screening winter oilseed rape crops as a source and reservoirs of beet western yellows virus for sugar beet crop infection, and the danger in some perennial weeds (creeping thistle) as a durable source of BWYV infection not only for beet but also for winter oilseed rape.
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