
Once you figure out that you have a fungus in your garden, you should not overreact. You do not want to reach for a spray bottle, instead you need to practice Integrated Pest Management (IPM). This approach to management of pests involves evaluation, monitoring, control and prevention. You need to understand and accept damage that is only cosmetic versus damage which may kill your plants. Figuring out which is which is not easy though.
The University of Maryland has a website to assist in identifying what’s going on in your garden which is the HGIC Plant Diagnostic Website. This site takes you through a series of steps to help identify the pests. Take a look at the infected plants. You will find a non-chemical approach to treating the pests and guidelines for when to use methods that may be less toxic.
It will also guide you to determine damage and not to jump to conclusions. For instance, sooty mold on a plant can look like a classic fungal infection. You will need to find out where the infection came from instead of jumping to conclusions.
Some gardeners like to make up their own homemade concoctions for treating the fungus and pests. Fine Gardening website called 355 Pest and Disease Remedies which discusses common products that most have in medicine cabinets or pantry. There is use for a chamomile tea to treat fungus.