Fungicide Sprays for Tomatoes
Fungicide sprays for tomatoes use chemical compounds or biological organisms to kill or inhibit fungi or fungal spores. The active ingredient in most spray fungicides for tomatoes is either copper or sulfur.
Using organic fungicides on tomato crops can lower impact to the environment, increase vitamin and mineral content in soil, and provide a long-term cost-savings.
The National Organic Standards Board of the Organic Materials Review Institute only allows the use of copper and sulfur based products in organic crop production for controlling disease. However, sulfur can easily burn off as the air temperature rises, making it of limited use to organic gardening and making copper based products the ideal method of preventing tomato blight.
Serenade Disease Control Spray is a non-toxic spray which guards plants from the most common fungal and bacterial garden diseases. The product is a biofungicide and is made from beneficial bacteria and fungi. The biofungicide triggers flowers, vegetables, and lawns natural response to fight diseases thereby eliminating the need to use chemicals which can irritate the skin and lungs. Two main responses inhibit the growth of bacteria: pathogens are prevented from attaching to the leaves of the plant and thereby are unable to infect the plant; and if the pathogens are able to attach to the leaves, the product outcompetes them for space on the leaves. In addition, the product destroys the pathogens ability to reproduce. In addition, the product is non-toxic to the environment. Fruits and vegetables can be harvested and consumed the same day as they are treated.
Bonide Copper Spray or Dust prevents powdery rust, black spot, and late blight. This fungicide is made by combining copper fertilizer with a naturally-occurring fatty acid. Copper is one of the oldest fungicides and bactericides used to control plant diseases. The copper and fatty acid acid mix and produce a copper salt (known as true soap).
Concern Copper Soap Fungicide (discontinued) prevents rusts, black spot, Powdery Blue Fungus, Downy Mildew, and late blight on flowers, fruits, and vegetables. The product works by combing a soluble copper fertilizer with a fatty acid to produce true soap.