Forum home› Problem solving

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: 11,391

    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: 27,158

    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: 11,391

    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: 27,158

    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: 11,391

    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: 27,158

    image



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