Other types of roses require regular attention to control disease and pest problems. Black spot is a fungal leaf spot. Affected leaves become spotted then yellow and fall off. Spray preventively with Funginex, or Dithane M-45. It's a good idea to alternate these fungicides every few months.
Powdery mildew is especially prevalent with poor air circulation, cool nights and damp weather.
Affected leaves and twigs may be removed, or controlled with Funginex. Insects - Sucking insects such as aphids, thrips, mealybugs and spider mites often attack roses. Control these with Orthene or Orthenex. Orthene also controls caterpillars, as do dipel dust and Thurcide spray - both organic and nontoxic, or Sevin dust. Place freshly cut stems in hot water, and leave in a cool, dark place for at least an hour before arranging.