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Hydrangea Scale

I used to have a beautiful Hydrangea that had huge deep pink flowers and large leaves, planted in a large pot in my garden. Sadly it has been badly infected with Hydrangea scale. Last year it was affected as well but it recovered. This year the infection is much worse, the sap is going from the leaves which are covered in the white sticky blobs, the stems have darkened and have the white blobs all down them and it seems at the moment I will only have two flowers on the plant.  I have sprayed with Resolva Bug Killer but it isn't stopping the infection.  Do I persevere or sentence it to death!

Posts

  • Pete.8Pete.8 Billericay, EssexPosts: 8,538

    Hope your plant makes it.
    There's an RHS article here that gives advice- 

    https://www.rhs.org.uk/advice/profile?PID=557

    Knowledge is knowing that a tomato is a fruit.
    Wisdom is not putting it in a fruit salad.
  • FAJFAJ Posts: 4

    Thank you but I have seen this.  It's how I knew what the problem was.  They advise getting rid of badly infected plants.  I may have to do this but feel reluctant to give up as yet. Thank you for replying.

  • Pete.8Pete.8 Billericay, EssexPosts: 8,538

    Does Resolva Bug Killer kill scale insects?
    I can't see a specific reference to Scale Insects on the label, and it isn't one of the suggested products on the RHS page.

    Knowledge is knowing that a tomato is a fruit.
    Wisdom is not putting it in a fruit salad.
  • Pete.8Pete.8 Billericay, EssexPosts: 8,538

    I have to correct my above post - Resolva does kill scale insects.
    Have you sprayed this time of year and done a couple of treatments then tried blasting with a hose?

    I have a very bad infestation on an Acer a few years ago. In the winter I brushed them off with an old shoe brush then sprayed the tree with Vitax Winter Wash - the tree has been fine since.

    Knowledge is knowing that a tomato is a fruit.
    Wisdom is not putting it in a fruit salad.
  • JacquimJacquim Posts: 49

    A bit time consuming but try running a blunt knife down the stems to pry them loose. I saw this in a French magazine and when one of mine was badly covered I did it. Does not get rid of all of them but seems to have allowed the plant to recover slightly. Also said to change topsoil afterwards to get them away from the plant.

  • FAJFAJ Posts: 4

    I have sprayed a few times now and also washed the plant with the garden hose.  Also have brushed the stems. I have tried to keep the top soil clean but may consider changing this. 

  • I have Scale on one of three hydrangea plants in pots. I am going to repot directly into the garden and have hard pruned them all. Each pot is infested with vine weevil. I have thrown away the soil. Will winter washing help and what should I use

  • FAJFAJ Posts: 4

    I'm afraid my lovely Hydrangea was sentenced to death!  I did so because I just couldn't get rid of the scale and it continued to be badly infected in spite of spraying and cleaning it. So I followed the RHS's advice and got rid of it.  A great shame but felt that was the best thing to do as I don't want other plants to become affected by this scale.  I will be leaving the area bare where the pot was standing for the winter and consider getting another Hydrangea next year.

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