When the soil temperature is about 12C, the fungus will start to attack the grass.
Another means to gradually lower the soil pH in the root zone is to use acidifying fertilisers.
Proper fertilization will keep grass strong and healthy.
If a fungicide is required, it is critical that you apply it when the take-all fungus is starting to become active, in the spring of the year.What to look for, take-all patch symptoms usually appear in late spring to early summer during the time period coinciding with first wilt stress.Overseeding turf infected with take-all patch.Avenae (Reviewed 9/09, updated 9/09, pesticides updated 12/16).The roots, resplendent registrar 3.30 crack rhizomes, stolons, and crowns turn dark brown to black with black ectotrophic hyphae on the surface of the roots.
Fungicides that are labeled for control of these diseases or that have shown promise include: Banner Maxx, Heritage, Patchwork, Rubigan.S., or Twosome Flowable.
Common name, amount to use.
A fall fertilization with a slow-release nitrogen fertilizer is encouraged.
Raising manganese levels in the soil (or lowering pH) appears to suppress the disease.
Fall applications as symptoms first appear have proven to slow the fungus.The base of the brown patch infected blade is usually slimy and rotten.If you answer yes to the above questions, then your turf may have developed the disease take-all patch.The early symptoms are the same, but the grass blades yellow and can be easily removed from the stolon with a gentle tug.There are fungicides available for the control of take-all patch, but remember, the use of fungicides should be integrated with the cultural practices described above.In Austin, this past fall we have had a deluge of rain, cool temperatures and high humidity.Where there is severe disease pressure, fungicide applications may be required in spring as well.Disease Symptoms, circular patches up to.Cultural Management, plant resistant cultivars.Azoxystrobin (Heritage).4 oz/1000 sq ft 4, until dry, mODE-OF-action group name (number1 Quinone outside inhibitor (11).Finally, top dressing diseased turf with light applications of natural soil has been observed to reduce disease severity.The key difference is that the stolons remain green with brown patch allowing the grass to recover in the spring.Take-all patch is most severe in sites with a high sand content, or recently fumigated soils.Large black perithecia, which are globular or flask-shaped fungal fruiting bodies, may be visible with the use of a hand lens.
Fungicides should be applied in a high volume of water so the fungicide dries on the leaves and can move down into the root zone.
If your turf has developed severe take-all patch, it will require several months for the turf to re-grow sufficiently to heal itself.
Gaeumannomyces graminis var avenae.