The effect of green crop lifting on the contamination of seed potato tubers by pathogenicErwinia spp. |
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| Authors: | P Kastelein A Bouman A Mulder L J Turkensteen J W L van Vuurde |
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| Institution: | (1) Agricultural Research Department (DLO), DLO Research Institute for Plant Protection (IPO-DLO), P.O. Box 9060, 6700 GW Wageningen, The Netherlands;(2) DLO Institute for Agricultural and Environmental Engineering (IMAG-DLO), P.O. Box 43, 6700 AA Wageningen, The Netherlands;(3) Laboratory for Soil-borne Diseases (HLB), P.O. Box 323, 9400 AH Assen, The Netherlands |
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| Abstract: | Summary In the Netherlands seed potato crops are harvested when still green, the haulm being destroyed before harvest. We compared
the effect on the contamination of seed potatoes byErwinia carotovora subsp.atroseptica (Eca) andE. chrysanthemi (Ech) of the common method of haulm destruction by flailing and chemically destroying remaining stems, with the recently
developed green crop lifting method.
After chenical haulm destruction the levels of contamination with both Eca and Ech surviving cold storage were found not to
differ significantly from those after green crop lifting. Losses due to watery wound rot (Pythium ultimum) were considerable in the warm and humid conditions during 1991, especially after green crop lifting. |
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| Keywords: | blackleg E carotovora subsp atroseptica E chrysanthemi watery wound rot Pythium ultimum haulm destruction green crop harvesting |
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