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Validation of ELISA for the detection of potato virus antigen in sap of potato plant leaves |
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| Authors: | Volker Zahn Jörg Dahle Karl‐Heinz Pastrik |
| Affiliation: | 1. Chamber of Agriculture of Lower Saxony, Plant Protection Office, Box 91 05 50, D‐30425 Hannover, Germany;2. e‐mail: volker.zahn@lwk‐niedersachsen.de |
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