Red Thread, Fusarium, Leaf Spot, Dollar Spot, Anthracnose and Rust are all lawn diseases. They can all affect the grass plant, causing discoloration, weakening the plant, and ultimately killing it all together. Most of these diseases are caused due to stress on the lawn - whereby the plant is: (a) not being cut correctly; (b) it is not receiving sufficient water; (c) thatch levels are too high; or (d) the lawn is compacted. The environment can also play a part - for example, humidity will affect the plant along with too much water sitting on the leaf of the plant. Control is achieved by cultural means or, if necessary, using a fungicide to correct some of the issues which may increase the stress, thus causing the disease.
Diseases in lawns are commonly caused by the presence of a fungus and are often termed pathogenic agents of disease. Disease pathogens are already present either in the thatch or basal leaf, awaiting the right conditions to break out. The disease known as Red Thread has a fungus called Laetisaria fuciformis, Fusarium has the fungus known as Michrodochium nivale. These are the most common lawn diseases we find in UK lawns. There are many others, some are listed above. The treatment of these diseases can be related to their cause, so the cultural process is probably best for the plant. If it works successfully, then the lawn is fully restored without the use of products which may be best saved for when the cultural process has been ineffective.
The sprayed product we recommend is taken from other fungi to act as an agent to protect the plant; the product works its way into the plant via the leaf and root system; it will control the disease for generally about one month. If the cultural processes have been followed, then it is likely you will have control for longer. We have two different fungicides, one for the growing season and the other for when the plant is dormant.
Having a good programme of lawn care i.e. regular feeding, weed control, aeration, scarification and moisture control, along with good cutting practices, will help to keep the lawn balanced and reduces the risk of disease.