Section outline
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The use of virus-tested plant material is highly recommended. CORaV-induced leaf symptoms can easily be confused with leaf chloroses induced by other causes in oak, which become dominant in the later vegetation period between July and September (Büttner & Führling 1993, Hahn et al. 2003). Therefore, reliable diagnosis of CORaV should be done for instance by molecular tools such as virus-specific RT-PCR or RT-PCR using genus-specific primers in combination with Sanger-sequencing (Rehanek et al. 2022, Bandte et al. 2020). Also, commercial serological tests (DAS-ELISA) are available for instance from Loewe Biochemica GmbH to confirm the CORaV infection of oaks.