Echinops problem

Posts

• Pete.8 Posts: 11,340

  June 2020

  It happens to mine too.
  I think it's aphids living in the tightly curled leaves - if I do nothing they don't flower but I find spraying once soon as I notice the leaves curling usually does the trick as when the leaves unfurl they don't seem to appear.
  Sometimes they need a 2nd spray.
  A systemic insecticide is needed as the bugs are well protected within the curled leaves.

  
  Billericay - Essex
  
  Knowledge is knowing that a tomato is a fruit.
  Wisdom is not putting it in a fruit salad.

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• BobTheGardener Posts: 11,385

  June 2020

  There are a couple of possibilities - powdery mildew and/or aphids, both of which cause similar looking damage.  Look inside some of those curled-up leaves and see what you find.  When I zoom-in, I think I can see some typical white spots of powdery mildew so would put my money on that, especially as the weather this year has been perfect for its development.
  

  A trowel in the hand is worth a thousand lost under a bush.
  

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• Pete.8 Posts: 11,340

  June 2020

  I was a bit late spraying mine this year.
  You can see where the damage happened earlier in they year and I only sprayed once.
  Now the flowers are ok I'll let that ladybird have a feast
  
  

  
  Billericay - Essex
  
  Knowledge is knowing that a tomato is a fruit.
  Wisdom is not putting it in a fruit salad.

  1
• The_herpetologist Posts: 481

  June 2020

  Thanks guys, you nailed it.... there are indeed aphids in the leaves!

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• 1634 Racine Posts: 568

  June 2020

  I’ve got floppy nops this year.  They are heading in all directions with a big gap in the middle.  I’ve also got big discolouration in the foliage.  Luckily both these things aren’t majorly visible at they are back of border and the flowers still seem fine
  
  
  

  
  

  
  

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• BobTheGardener Posts: 11,385

  June 2020

  @1634 Racine You have leaf miners there:

  https://www.rhs.org.uk/advice/profile?PID=984
  

  
  

  A trowel in the hand is worth a thousand lost under a bush.
  

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• 1634 Racine Posts: 568

  June 2020

  BobTheGardener said:

  @1634 Racine You have leaf miners there:

  https://www.rhs.org.uk/advice/profile?PID=984
  

  
  

  Thanks Bob.  Very interesting.  I did have a look to see if there were any beasties.  Would make sense that I didn’t see any if they are mining the leaves!
  
  Kind go glad to see there are no recommended controls from RHS. I don’t want to be starting any new battles in the garden.  With any luck these miners might make a tasty treat for one of the more welcome garden visitors

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• BobTheGardener Posts: 11,385

  June 2020

  Yep, in general, leaf miners are untreatable but you can often lessen the chances of them appearing by burning etc. the old foliage at the end of the season because they pupate within the leaf cavities they have made.  Depends on how much they bother you, especially given that echinops tend to look generally tatty after flowering, anyway.

  A trowel in the hand is worth a thousand lost under a bush.
  

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• CH1973 Posts: 73

  May 2023 edited May 2023

  Hi guys. After reading this I now have aphids on one of my globe thistles. Curled leaves and stunted growth. I've sprayed twice with a soapy water mixture and the little blights are still there.
  
  If I cut the plant to ground and dispose of the infected stems and leaves.... Will it produce new growth and still flower? 

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• Pete.8 Posts: 11,340

  May 2023

  Probably not.
  I sometimes use a Pyrethrum (organic) spray for such situations and give it a spray at dusk. It soon clears them but is not a systemic insecticide, so doesn't give long term protection.
  Mine usually get an infestation, but so far this year seem ok.

  
  Billericay - Essex
  
  Knowledge is knowing that a tomato is a fruit.
  Wisdom is not putting it in a fruit salad.

  0