SUSCEPTIBILITY OF SELECTED ASPARAGUS CULTIVARS TO FUSARIUM SPP. UNDER FIELD CONDITIONS

The trial including 14 cultivars was carried out during 12 years. 400 crowns of each cultivar were planted, 100 per one plot.

Since the fifth year from planting time over a period of 7 years till the end of the trial plant decline and stem infestation by fungi of Fusarium species were analysed.
The stem infection was determined in a five scale degree on the basis of 50 randomized stems, one from a single plant.

After 12 years from planting time crowns were ploughed out and infection of rhizomes and roots was estimated.
Until this time only 2.5% plants of California 500W and 11.5% of Mary Washington survived whereas of remaining cultivars 38–68%. Stems of the two cultivars exhibiting the greatest decline as well as rhizomes and roots showed a significantly higher infestation.
The lowest level of infection was found on stems of Limbras, Huchel’s L., Schwetzinger M., Limburgia, ST-3 and Danische Riesen.

The most often isolated fungi were Fusarium oxysporum f. sp. asparagi, F. moniliforme and to a smaller extent F. solani, F. culmorum, F. roseum and F. oxysporum var. redolens.

For the three last years an investigation concerning on stem infection of 21 cultivars by fungal complex.
The least infested among all cultivars was Lucullus, the most Bruneto, Limbras No. 22 and Cito.

VII International Asparagus Symposium

C. Sadowski, M. Knaflewski

https://doi.org/10.17660/ActaHortic.1990.271.49