Reds spider mite infecting my hedges

Answered by Julian Posted in Category Pest Control & Nature

Dear Julian

I have about fifty yards of coniferous hedge infected with red spider. I wondered what to do about it.  My neighbour would rather that I did not use a kill all spray, must I disregard him?

Yours faithfully

Alan Thornton

Dear Alan

You can apply red spider mite predators to eat red spider mite. However this is not that practical for a conifer hedge. I would suggest you use a spray with short persistence i.e one that does not leave harmful residues, which kill beneficial insects for weeks after application. There are two products that Harrod Horticultural has, which might be suitable. The first is Insect Killer spray, which contains a natural pyrethrum poison. This kills on contact but does not persist on the plant as it breaks down with exposure to sunlight. The other option is Savona Fatty acid spray, which also kills on contact. Both would need to hit the spider mites to be effective and would need more than one treatment. The biological option is to hang Spider mite Killer sachets in the hedge to release predators. I hope this helps.