Fytosanitaire risico's: Ralstonia in Roos (BO-43-011.02-002, BO-20-002.01-004)

Project: EZproject

Project Details


This project aims to study the survival of Ralstonia solanacearum and R. pseudosolanacearum in rooted potting soil, rockwool and cocopeat, and in run-off water from drip-irrigated rock wool mats on which roses were grown at 5, 20 or 28 oC. Rifampicin-marked strains of the pathogens were used that exhibited the same virulence on tomato as the parental strains. Populations of both strains declined gradually but were able to survive for at least 56 days in the (rooted) substrates irrespective the storage temperature. After 112 days, the last sampling date, R. solanacearum could be found occasionally in cocopeat, rockwool and drainwater, but not in soil. In sterile water, R. solanacearum was still present in all tested samples. We conclude that there is only a small risks for long term survival (exceeding one year) of Ralstonia (pseudo)solanacearum in substrates used in ornamental crop production.

Effective start/end date1/01/1631/12/18