Does anyone have Necrotic Ring Spot on their lawn? This is a lawn and soil problem that has intrigued me for the past few years and I would like to explore it this Summer.
Necrotic Ring Spot is a fungus that is likely present in most soils. It seems to get worse in areas that are over-watered for extended periods of time (eg: months). Soil that has poor drainage will also be more likely to allow the fungus to spread.
In addition to overwatering there also needs to be a lack of beneficial microbial activity in the soil. Necrotic Ring Spot spreads when there are no competing microorganisms.
Fast release or inorganic nitrogen fertilizers may also allow the fungus to spread more quickly. Most of these fertilizers contain salts that deplete beneficial microbe populations as well as increase the amount of thatch. Fungus spores grow and propagate on the thatch layer. There are a few fungicides on the market for treating Necrotic Ring Spot that will also deplete the beneficial microbes and may cause additional problems.
My interest in studying this lawn problem is that on paper our products should be ideal to help treat and likely prevent this fungus from spreading.
- Our products improve natural soil aeration and drainage.
- Are concentrated with beneficial microbes.
- Remove the build-up of salts and toxins in the soil that deplete beneficial microbes.
- Compost and remove thatch.
I suspect that while overwatering may be a contributing factor the main issue is a lack of beneficial microbes in the soil. A biologically healthy soil should have a natural immunity to damaging funguses.
I have a neighbor that has been fighting Necrotic Ring Spot in her lawn for the past few years. This Spring I offered to treat her lawn as a test to see if our RestoreClay product will help her situation.
She uses a lawn care service that applies a lot of fast release fertilizer on a frequent basis. She also has a number of flower beds in her yard and waters frequently. I believe these conditions have depleted the beneficial microbes in her soil.
Initially, I have applied 2 ounces of RestoreClay on a 10 x 10 ft section of her lawn. This is 6x the normal application amount. This will build the beneficial microbe population quickly and will neutralize any harmful conditions in the soil from over fertilization. This should allow these spots to recover fairly quickly and give me an idea of the concentration needed to treat the rest of her lawn.
The long-term benefits will likely take until next Fall to realize. My goal is to help repair the damage from last Summer as well as prevent new damage from occurring. Any new damage will likely happen in the heat of the Summer. I believe the damage in this picture happened 9 months ago. I will post any new developments as they occur.
If you have Necrotic Ring Spot or other damaging funguses in your yard I would like to hear from you. It would be great to have others testing our products on their lawn and any fungus problems common in the area.
6 Week Update
We applied the 2nd application of RestoreClay to the Necrotic Ring Spot damaged lawn. For this application, we combined the RestoreClay with Liquid Humate. Liquid Humate adds organic matter that helps to stimulate the growth of the beneficial microbes found in the RestoreClay. This increase in beneficial microbes is important to compete against and lessen the population of the fungus spores.
The grass has started to cover the bare spots and should completely re-grow within the next few weeks.
The surrounding grass has greened up and looks very healthy. In most Necrotic Ring Spot cases the center of the spot is greener than the grass outside the ring. In this example, the grass in the center of the ring is only slightly greener than the surrounding grass. Overall the area treated with RestoreClay is greener and healthier than other areas of the law that were not treated. (Yellow spots in the picture are from light filtering through a tree.)
Fungus spores grow and spread on the thatch in the lawn. The active microbes contained in RestoreClay have composted the thatch layer and removed it as an area for the fungus spores to propagate.
The plan is to apply one more application in another 6 weeks. This should be sufficient to restore the health of the soil and the lawn and to enable them to resist future Necrotic Ring Spot Damage.