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Attempts were made to transmit the infective agents of leafroll, yellow speckle, and fleck diseases from infected grapevines to several herbaceous species and to healthy vines using dodder (Cuscuta campestris).
Dodder transmitted leafroll to all and fleck to half of the respective receptor vines, but none of the three diseases were transmitted to herbaceous plants including Chenopodium, Gomphrena and Nicotiana species, Cowpea, Bean, Cucumber, Squash and Petunia. Suggested transmission of yellow speckle to vine was inconclusive because this disease may have been spread naturally.
Investigations on Transmission of Grapevine Leafroll, Yellow Speckle and Fleck Disease by Dodder
1982, Phytopathologische Zeitschrift, vol 106, pages 193-198
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