FURTHER INVESTIGATIONS ON THE IDENTIFICATION OF THE VIRUS OF CHRYSANTHEMUMS IN BELGIUM
The most important varieties cultivated in Belgium are the chrysanthemums used at "1 nov.". These one-year plants are cultivated in pots or in the ground and are frequently infected with CAV and CVB.
The other varieties, which are grown in increasing numbers, are the chrysanthemums cultivated year round. They are mostly affected by CSV and the "mottle diseases", but seldom found infected with CAV or CVB (Verhoyen et al., in preparation).
The major problem we had to resolve was the detection of CAV and CVB. Because of the erratic responses in the detection methods we employed, attempts were made to improve the sensitivity of the tests.