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#1
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Copper spray
I've sprayed my peach trees with home made Burgundy mix (a variant on
Bordeaux) and was wondering how long copper sprays have to be on the plant to be effective? We got a very light shower within 24 hours of application but I can still see a light blue tinge around the bud edges and it doesn't look if much, if any, got washed off. Given this situation I began wondering about effectiveness and not one of my gardening books, of which I have oodles, says anything useful about how long copper sprays need to remain on the plant to be effective as a fungicide. Anyone got any idea? |
#2
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Copper spray
"FarmI" be given wrote I've sprayed my peach trees with home made Burgundy mix (a variant on Bordeaux) and was wondering how long copper sprays have to be on the plant to be effective? We got a very light shower within 24 hours of application but I can still see a light blue tinge around the bud edges and it doesn't look if much, if any, got washed off. Given this situation I began wondering about effectiveness and not one of my gardening books, of which I have oodles, says anything useful about how long copper sprays need to remain on the plant to be effective as a fungicide. Anyone got any idea? I think they just have to be there to be effective, they don't get into the plant, just sit on the leaves and stop the fungus from doing its stuff. Therefore they will not cure an existing problem just stop one from happening. -- Regards Bob Hobden |
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