Chemicals for the control of diseases of floral crops

The conditions under which many floral and foliage crops are produced, i.e., high humidity, low light intensity and frequent watering are favorable for the development 0£ fungal and bacterial diseases. If insects are uncontrolled in the greenhouse, viruses can become a major problem. Nematodes may be introduced on infected plant material or unsterilized soil.

Sanitation in propagation and growing will reduce the incidence of disease. Soil-less culture, healthy plant material, clean containers and benches, and pathogen-free water are important. considerations. Plant culture on wire benches will avoid soil-borne pathogens. Most fungicides are protectants and require frequent re-application. Early correct identification of causal agents is important in preventing heavy disease losses and avoiding improper use oi pesticides.