Fungicide to Kill Black Mold on Your Lawn

Written by richard rowe
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Fungicide to Kill Black Mold on Your Lawn
A number of agents can kill mould on your lawn; just make sure that they don't kill the grass as well. (Jupiterimages/Goodshoot/Getty Images)

Mold is an endemic problem in some places, especially those that receive a great deal of moisture. Lawn moulds aren't necessarily dangerous, but they can be extremely unsightly and difficult to treat.

Natural Fungicides

A great number of fungicides are derived from plants that have a natural resistance to mould and fungi. Cinnamaldehyde (the chemical that give cinnamon its colour and flavour), tea tree oil, jojoba oil, milk diluted 10-to-1 and rosemary oil are all powerful and fairly benign anti-fungal agents. The sulphur fungicides used to treat surface infestations will not kill fungi in the soil.

Biological Agents

A number of different organisms are lethal to mould, but are benign for plants. The bacteria Bacillus subtilis--aka hay or grass bacillus--will attack and kill mould. Cattle feed producers often use powdered kelp to control mould formation, and the harmless fungus Ampelomyces quisqualis will eat the mould and then die off.

Copper Sulfate

Copper sulphate is one of the most common of chemically derived fungicides, and is extremely effective in treating infestations. This chemical, however, isn't exactly friendly to plants or animals in the concentrations required to kill mould. Not only does it inhibit grass seedling growth, chronic exposure via fruits and veggies grown in the stuff can result in anaemia, cancer, liver and kidney disease and infertility.

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