[Verification of the plum pox virus (PPV) using the tray test (author's transl)].

A comparison of 6 host plants reacting by local lesion if infected by the Plum Pox Virus (PPV) demonstrated that beside Chenopodium foetidum Schrad. also Nicandra physaloides (L). Gärtner, Nicardra physaloides violacea Bitter and Verbena officinalis L. are pretty well suitable to verify the PPV serving as locally reacting test plants. Using the tray test, the PPV was verifiable by separated leaves of C. foetidum Schrad., N. physaloides violacea Bitter, N. physaloides (L.) Gärtner and V. officinalis L. Applying experimental conditions precisely defined, an abridgement of the period between infections and development of the symptomes by three days was acquired here, compared with the plant test.