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Digitale Medien

Metalaxyl resistance in Phytophthora infestans on greenhouse tomatoes in Greece (1985)

PAPPAS, A. C.

Oxford, UK : Blackwell Publishing Ltd

Plant pathology 34 (1985), S. 0

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ISSN: 1365-3059

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft

Notizen: In winter/spring 1984 resistance to metalaxyl developed in Phytophthora infestans within tomato greenhouses in Preveza, Greece. The appearance of resistant isolates followed continuous applications of metalaxyl and prevalence of weather conditions favourable for late blight. The majority of resistant isolates grew on tomato leaf discs floated on solutions containing 100 μg/ml metalaxyl whereas sensitive isolates were inhibited at concentrations of 0.1 μg/ml.In trials within polyethylene tunnels metalaxyl had no effect on the development of the late blight induced by resistant strains but both a mixture of this fungicide with mancozeb and mancozeb alone, gave satisfactory control of the disease when applied in a 7-day schedule.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1365-3059.1985.tb01362.x

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Digitale Medien

Determination of radionuclides associated with colloids in natural waters (1987)

Salbu, B. ; Bjørnstad, H. E. ; Lydersen, E. ; [weitere]

Springer

Journal of radioanalytical and nuclear chemistry 115 (1987), S. 113-123

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ISSN: 1588-2780

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie , Energietechnik

Notizen: Abstract Due to the interaction with components present in natural waters, radionuclides may be present in different physico-chemical forms, varying in size, charge and density. The distribution pattern will influence the transport, mobility and biological uptake of the radionuclides. Size fractionation based on hollow fiber is useful for the determination of the size distribution pattern of radionuclides in natural waters. Furthermore, a continuous mixing and separation system has been developed for the investigation of the association of radionuclides with naturally occurring colloids. Results based on radionuclides in waste water from the Forsmark nuclear power plant, Sweden, will illustrate the potential usefulness of the technique.