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in Problem solving
i have brown dead patches on my conifers what is the cause please
Depends where they are.
If they're low down they might well be dogs or cats marking.
If high up, it could be conifer aphid. You could try spraying around the area with Provado Ultimate Bug Killer - I don't think there's a specific killer for them.
You'll have to cut out the brown sections as they won't green up.