THE OCCURRENCE OF SEVERE LEAF NECROSIS OF FREESIA DURING DIFFERENT TIMES OF CULTIVATION

Some virus diseases have been described in Poland infecting freesia but severe leaf necrosis (SLN) causing severe leaf necrosis, heavy stunting, colour break and deformation of the flowers and premature death of the whole plants, is the most common and important.

The observations on the occurrence of severe leaf necrosis and/or flower distortion and discoloration were carried out during the years 1985–1989 on a private farm in Radom.
Bulbs of 17 cultivars were planted on different times in 6 greenhouses.
The plants showing symptoms were regularly removed.

Differences in the percentage of affected plants were found depending on the time of cultivation and the cultivar.
Some cultivars (Athene, Iceberg, Stella, Escapade, Panama) planted in autumn and winter were less severely affected than that cultivated in summer.
In the third year of growing, most of the cultivars were much more severely affected than in the first one.
The cultivars most severely affected were Himalaya, Pallas and Venus.

VI International Symposium on Flower Bulbs

M. Kaminska

https://doi.org/10.17660/ActaHortic.1992.325.105