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Black fly and Ants on My Bean Stem

NewBoy2NewBoy2 Posts: 1,813

I have just one stem 4 inches long covered with black fly and the ants seem to be just walking over them

A friend suggested that they maybe looking after them and farming them

Sounds potty to me but any thoughts friends

Everyone is just trying to be Happy.....So lets help Them.


  • Yes, ants do 'farm' aphids;  They move young ones to new growth and protect them from attack!  When aphids suck the sap of plants, there is too much sugar for them to digest and they get rid of it as 'honeydew', which the ants feed on.  It is a symbiotic relationship.  Interesting read here:


    A trowel in the hand is worth a thousand lost under a bush.
  • Steve 309Steve 309 Posts: 2,753

    The usual trick is to pinch out the top few inches of stem after the beans have set.  This makes life more difficult for the aphids (as they then only have tough old tissue to get their teeth into) and helps the beans ripen.

    However, this is normally applied in early summer when the beans are ripening.  I'm a bit puzzled as to why it's a problem now - broad beans are in the freezer and on the compost heap.  Unless you've got them on runner beans....

  • NewBoy2NewBoy2 Posts: 1,813

    Steve.....on one stem of one runner bean

    Bob......thanks thats something I have learnt today

    Everyone is just trying to be Happy.....So lets help Them.
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