My roses have beautiful foliage but the flower buds shrivel and turn black. Whats wrong?
Your rose probably has been attacked by the rose midge, an almost invisible pest. The female lays her eggs in the rosebud and the emerging larvae feed on the tender new growth. Larvae then overwinter in the soil. Control is achieved by repeated sprayings of both the foliage with an insecticide and the soil with Diazinon.