Changes in Watering

• Fungus and mildew often grow on plants when you water them in humid climates using techniques that allow water to settle on leaves, stems and woody parts of the plant. If you are having fungal or mildew problems with your garden, start watering them with a soaker hose instead of a sprinkler. Using a soaker hose will help keep the upper parts of the plant dry and help prevent spread of the infection.
  
  

Copper-Based Fungicides

• Copper and copper compounds can inhibit the growth of fungus, mold and mildew. By applying a copper-based fungicide, you can treat flower and vegetable infestations. Copper-based fungicides are not as toxic as many chemical fungicides and are often preferred by organic gardeners. Copper-based fungicides are generally liquids that you spray on the affected areas of the plant, tree or garden.
  
  

Chemical Fungicides

• For extreme infections or infections that haven't responded well to copper-based fungicides, chemical fungicides may be your best option. Chemical fungicides contain one of many different chemical agents, including mycolobutanil or propriconazole. Apply these liquid fungicides using a spray bottle. Some chemical fungicides are positioned between these two strong fungicides and copper-based fungicides. Lime sulphur and Bordeaux mixture are strong fungicides that often work well when copper-based fungicides have failed. Like other fungicides, these are liquids that you spray on the affected plant, tree or garden.