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redman85 wrote: its fungicide useless against this disease ?
Yes. The only cure against pear rust is removing all junipers in the neighbourhood.
en.wikipedia.org/wiki/Gymnosporangium_sabinae
But as said, it depends on the trees you have. Not all trees, and even not all junipers, are susceptible to it.
Last Edit:8 years 11 months ago
by Auk
Last edit: 8 years 11 months ago by Auk.
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In a monthly newsletter from a bonsai club in Netherlands, there was an article about it.And Exact from Bayer had (some) results.I think it was bonsai club rijnmond but I'm not sure.
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by Orlando
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Rust cannot be cured, and is very dificult to prevent as you will have to spray fungicide at the time of pollen-spreading, which can take place over several months in late summer..
The spores of the fungus do NOT move from juniper to juniper, but from juniper to -other host plant- and then back to juniperus.
Unfortunately, many plant species in the rosaceae group can be the midlle-host. (Apple and hawthorn amongst the most often found species).
The spores of the fungus do NOT move from juniper to juniper, but from juniper to -other host plant- and then back to juniperus.
Unfortunately, many plant species in the rosaceae group can be the midlle-host. (Apple and hawthorn amongst the most often found species).
by leatherback
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