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Planting of seed tubers infected with late blight has been reported as a major cause in initiating the disease at field level. Seed treatments with contact fungicides can protect healthy tubers from infection during handling, grading and cutting before planting, but are not effective in protecting the young plant after emergence, when is more susceptible to the disease. Foliar fungicide applications...
Three experiments aiming to explore the efficacy of fungicides to protect newly developing potato leaves were carried out between 2000 and 2002. Contact, translaminar and systemic fungicides were applied in field trials at Lelystad in the centre of the Netherlands. Efficacy of the fungicides was established using a bioassay in which detached new grown leaflets (cv Bintje) were inoculated with Phytophthora...
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