Choroby wirusowe funkii (Hosta Tratt.)
AbstractFreckles and blotches resembling virus infection were observed on leaves of four funkia species. They occurred most often in plants of Hosta lancifolia but only sporadically in H. uertiricosa, H. forturtei and H. plantaginea. Virus origin of the disease symptoms was stated in plants or the first two species, in which two different viroses were distinguished on the basis of identification or collected virus isolates as well as their etiology and spread in nature. The identification consisted of the host-range study, serological and E.M. tests of particular isolates and of determination of their stability in sap (longevity in vitro, thermal inactivation point, dilution end point) in expressed sap. Viroses occurring more frequently - although only on plants of Hosta land¬folia — was defined as funkia chlorotic ringspot. It was probably caused by the tobbaco rattle virus (TRY) which in natural conditions can be transmitted by nematodes of the genus Trichadarus, but not by mechanical contact with the diseased plant. The second virus disease which caused yellow-green patches on leaves of the diseased plants was named the funkia yellow mottling. It was stated only on several plants of FT. lancifolia and FL ventricosa. Its casual agent was identified as cucumber mosaic virus (CMV). This disease could be propagated equally well by mechanical transmission or by aphids. It was stated, that the prevailing aphid species, colonizing mostly flower stalks of H, Dentricosa was Aphis fabae, whereas on H. lancifolia. mainly yzits persicae was found. The author could not demonstrate the viral origin of irregular patches which occurred on leaves of observed plants of H. fortanei and H. plantaginea.
|Other language title versions||Virus diseases of Hosta Trait|
|Publisher||Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie, MNiSW |
|Publishing place (Publisher address)||Kraków|
|Book series /Journal (in case of Journal special issue)||Zeszyty Naukowe Akademii Rolniczej im. H. Kołłątaja w Krakowie. Rozprawy, ISSN 1233-4189, (0 pkt)|
|Publication size in sheets||2.7|
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