It appears the best control tactic is to apply a systemic insecticide to the soil around the rose bushes, using a systemic granular insecticide listed for the control of midges early in the spring is recommended where midge problems exist.
It appears the best control tactic is to apply a systemic insecticide to the soil around the rose bushes, using a systemic granular insecticide listed for the control of midges early in the spring is recommended where midge problems exist.