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Hawthorn Tree

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  • The 'legs' are the fruiting bodies of Hawthorn rust which release spores.  Those spores go on to infect the 2nd host in this disease, a Juniper.  There, they grow into the 2nd form of the fungus which forms galls, then jelly-like growths, which finally release spores which go on to infect hawthorns (plus other related trees, like apples), thus completing the cycle.
    I think the little hatchlings are Shield bugs, which go through several "instars" before becoming adults.  They are sap-suckers, but cause insignificant amounts of damage, so are nothing to worry about. :)

    Thanks for correcting me on the bug eggs ID.
  • Thank you for your replies. I've currently got the leaf with the bugs on in a container inside as I thought they were ladybugs. The leaf was taken off the tree yesterday. I didn't want them to die. The leaf was dying. I'm not sure what I should do with them now. Any advice? Should I just put the whole lot back outside? 
  • BobTheGardenerBobTheGardener Posts: 11,385
    Yes, I would use some cotton to tie the leaf stalk onto a twig on the Hawthorn tree.  They will soon find their way to a meal. :) 
    A trowel in the hand is worth a thousand lost under a bush.
  • Thank you
  • Sorry if this has already been said...The ants farm the aphids, the aphids suck out the sugars from the plant then the ants drink the waste (wee) from the aphids. 


    Nottinghamshire.
    Failure is always an option.

  • BobTheGardenerBobTheGardener Posts: 11,385
    edited June 2021
    Sorry if this has already been said...The ants farm the aphids, the aphids suck out the sugars from the plant then the ants drink the waste (wee) from the aphids. 



    There are no aphids in any of the photos in this thread @Sunflower26 :)
    A trowel in the hand is worth a thousand lost under a bush.
  • @BobTheGardener

     Maybe not in the pictures, but in the first post it was mentioned that ants were going up to the ends of the leaves and spending a lot of time under them. I was just saying what the ants maybe doing.

    I do however bow to your superior knowledge on all things
    Nottinghamshire.
    Failure is always an option.

  • There were ants in my first post about my tree. But there were no aphids. They seemed to be going underneath the new leaves and maybe eating something there. I recently posted about my Astilbe. That was covered in black aphids and ants x. 
  • fidgetbonesfidgetbones Posts: 17,618
    One of the hawthorns had so much rust the other year it turned brown. We left it alone. It is fine this year.
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