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- W1997686534 abstract "SUMMARYBy means of a Botrytis fabae/Vicia faba bio-assay technique it has been demonstrated that phenyl mercury chloride, maneb, mancozeb, dichlo-fluanid and oxythioquinox protect areas of leaf beyond the visible limits of the fungicide deposits. The evidence suggests that the extended areas of protection are due to the release of fungicidal vapours. For a given dose of mancozeb the area of protection was related to the number of conidia of B. fabae dusted on to the leaves and for a given inoculum density it extended with increasing fungicide dose applied in standard drop sizes. When the same dose of fungicide was applied in increasing volumes of water, producing widening areas of deposit, the area of protection also increased. Fungicide deposits aged on leaves for up to 4 weeks continued to release toxic vapours.Contact between the fungicides and leaves or between fungicides and spores was not necessary for the demonstration of the phenomenon since vapours diffused from deposits on glass and inhibited the germination of spores in water droplets placed at a distance from the fungicide source. For a given distance separating the fungicide and the spores inhibition increased with increasing fungicide dose. For a standard fungicide dose, inhibition decreased with increasing distances between the fungicide and the spores. The fungicidal vapours inhibited the germination of spores of test fungi other than B. fabae.The practical implications of these observations are examined in the light of evidence that vapour phase protection can occur on leaves incubated in large cabinets; on leaves pre-incubated at unsaturated humidities; and on leaves incubated in a moving stream of air." @default.
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- W1997686534 date "1967-10-01" @default.
- W1997686534 modified "2023-09-25" @default.
- W1997686534 title "Observations on the vapour phase activity of some foliage fungicides" @default.
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- W1997686534 doi "https://doi.org/10.1111/j.1744-7348.1967.tb04479.x" @default.
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