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#16
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Runner beans having a problem.
"Geoff" wrote in message ... "shazzbat" wrote in message ... Snip . . . . . . being taken to the upper atmosphere by thermals freezing and being blown a long way before dropping down, thawing and going about their business. Frightening! Hope it's not true. I wonder how they do that. The scientists I mean, not the aphids. Have a look at the windscreen of an aircraft! Do conventional aircraft get into the 'upper atmosphere'? Mary |
#17
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Runner beans having a problem.
In article , "Mary Fisher" writes: | | Do conventional aircraft get into the 'upper atmosphere'? Strictly, no - and I doubt aphids do, either. When people talk about the 'upper atmosphere' in lay articles, they often mean the height of the jet streams. Regards, Nick Maclaren. |
#18
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Runner beans having a problem.
"Nick Maclaren" wrote in message ... In article , "Mary Fisher" writes: | | Do conventional aircraft get into the 'upper atmosphere'? Strictly, no - and I doubt aphids do, either. When people talk about the 'upper atmosphere' in lay articles, they often mean the height of the jet streams. Ah, right, thanks. I thought you'd mentioned it so assumed you really did mean it but now I see it originated somewhere else. Pay attention, Fisher! Mary |
#19
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Runner beans having a problem.
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Geoff wrote: Diggers, You may remember that a short time ago I recommended using large modified plant pots (8-9 inch diameter), inverted over runner bean plants to enable watering and feeding liberally but not wastefully. Well, it has other advantages apart from watering and slug/snail barrier for I've noticed no ants which I reckon carry aphids from one part of a plant to another. The beans still have blackfly but I keep them under control with regular spraying with a soft soap/rainwater solution. Soft soap is made with caustic potash instead of the caustic soda used in the manufacture of household soap which is not anywhere near so effective against aphids. However, not all in my bean patch is rosy! Some of the plants' leaves are "bobbly" and become withered and dried at the edges. The affected leaves are very frangible even though still green. Some - about half - of the affected leaves had been attacked by aphids but I do not think they were the cause. Does anybody know what causes the problem and can suggest an environmentally friendly way of control please? Regards Geoff |
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