Reply from Pitch Pines-Lawn Care Specialists: “Red Thread fungus is caused by the excessive amount of rain that we have had. It will grow out and not cause any permanent damage once it starts to dry out. I don’t recommend putting a fungicide down for red thread. The cost of fungicides are extremely expensive, red thread will not do any permanent damage and the lawn will become dependent on fungicides by applying them.
As the temps change other summer diseases will become an issue (pythium, brown patch, dollar spot) which may need a fungicide. I usually recommend to customers to keep a fungicide on hand so they can apply it as needed to these diseases. Generally one application will not be enough, so to pay someone to apply them gets very expensive. I will also be applying a grub control and a fertilizer next week which will help to push the red thread out (nitrogen). Thanks.
Riverwalk Branford 