Forum home› Problem solving
This Forum will close on Wednesday 27 March, 2024. Please refer to the announcement on the Discussions page for further detail.

Horse chestnut scale

Pilchard's DadPilchard's Dad Posts: 1
in Problem solving

Hello all.

My neighbour has pointed out I have Horse Chestnut Scale on a beloved Acer. I have found insecticides suggested for smaller plants (vitax, bug clear, Provado) but my tree is 8' by 6'. Does anybody have any suggestions please?

Posts

  • BobTheGardenerBobTheGardener Posts: 11,384

    Provado is systemic so spreads throughout the tree when sprayed on the leaves and a systemic type of insecticide is the only one which is really effective against scale insects.  Luckily, acers don't flower so as long as you wait for a windless day there is little chance of harming pollinators and other beneficial insects.

    A trowel in the hand is worth a thousand lost under a bush.
  • nutcutletnutcutlet Posts: 27,445

    Acer negundo flowers Bob, dangly things. Might be dioecious. 

    I thought they all flowered but I only grow negundo and campestre 



    In the sticks near Peterborough
  • BobTheGardenerBobTheGardener Posts: 11,384

    Didn't know that nut! image

    I only grow for the leaves so if mine have flowered, I've just never noticed.image

    A trowel in the hand is worth a thousand lost under a bush.
  • nutcutletnutcutlet Posts: 27,445

    I must check that, All trees and shrubs flower and seed naturally but some of those multi-disected red leaved ones are a long way fom natural



    In the sticks near Peterborough
  • BobTheGardenerBobTheGardener Posts: 11,384

    Looked it up - acers (to my surprise) are almost all insect pollinated!

    A trowel in the hand is worth a thousand lost under a bush.
  • nutcutletnutcutlet Posts: 27,445

    image



    In the sticks near Peterborough
Sign In or Register to comment.