Avoid overhead watering if possible to prevent fungal diseases. Use drip or flood irrigation. Mulch grass or straw around plants to avoid dirt with disease splashing on plants. Support leaves of low growing plants such as zucchini, marrows and strawberries with mulch. Keep the ground surface clean and free of weeds.
Weeds harbour aphids and other pests.
Ensure adequate soil drainage. Avoid importing contaminated soil, manure or mulch, 2. Only use certified disease-free plants from a reliable source, 3. Use only sharp secateurs, knifes and saws. Disinfect implements regularly to avoid cross-contamination.