ASK JOHN NEGUS
Orchid attack, bumbling bees, stinking lilies, mysterious tree
QWhat is attacking my Phalaenopsis and how can I get rid of it? Marion Smith, Saltford, Bristol
AI suspect red spider mites have been busy. These microscopic insects suck sap from leaves and cause cells to die. If you look at the foliage through a microscope you should be able to see the mites scurrying around.
The best way to treat the pest is to use an aerosol form of Provado Ultimate Bug Killer or Bugclear Ultra Gun. Both are contact and systemic pesticides and most garden centres stock them.
Additionally, feed your plant with orchid fertiliser to improve its immunity to attack from these pests and boost its vigour.
Red spider mites suck sap on undercover plants