ISHS Acta Horticulturae 233: Workshop on Replant Problems with Fruit Trees
PRELIMINARY NOTE ON A BIOASSAY FOR PROGNOSIS OF SPECIFIC APPLE REPLANT DISEASE IN SWEDEN |
| Author: | B. Waechter-Kristensen |
| Abstract:
A test method consisting of soil sampling, analysis of physical and chemical properties and nematode occurrence, a bioassay conducted in field, disease index and a standard is presented. The field bioassay for specific apple replant disease (SARD) was first tried in 1985 in a commercial apple orchard. This bioassay might be an alternative to other methods as it reviews the SARD situation more objectively through the use of several Malus-rootstock types as test plants combined with a plum-rootstock as an indicator of specifity and a disease index. Fruit growers and nursery men may easily perform the test by themselves without great investments. | |
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