Also, a considerable amount of zoysia grass and bermudagrass sod is produced in the state. In georgia, large patch disease of turfgrass is most common in the fall and in the spring as grass is entering or leaving dormancy. Rhizoctonia large patch zoysia patch turfgrass science. This fungus and several related species are responsible for numerous turfgrass diseases including brown patch and yellow patch that can occur at anytime on all grasses, except during very cold winters. Large patch is caused by the pathogen rhizoctonia solani ag 22 lp. The fungus, rhizoctonia solaniis the causal agent of large patch.
In general, zoysiagrass is an easily maintained turfgrass, but. This factsheet summarizes the characteristics of large patch. However, the fungus that attacks zoysiagrass and bermudagrass grows best at cooler temperatures and. Identification and control of rhizoctonia large patch in georgia. Augustinegrass, and zoysiagrass across the state of georgia. The rhizoctonia solani fungus attacks zoysia grass and causes a disorder called large brown patch.
Large patch affects most warm season turf grasses growing. Rhizoctonia large patch rlp is the only major disease of zoysiagrass in indiana. These patches can then expand rapidly into welldefined large patches 20 feet or more. Rhizoctonia large patch disease of zoysiagrass and. The fungus, rhizoctonia solani is the causal agent of large patch. Brown patch, a fungal disease of turf caused by the pathogen rhizoctonia solani, is sometimes also called rhizoctonia blight. Large patch in zoysia and bermuda bayer environmental. F, and there is an extended period of leaf wetness. Prevalence and sites of survival of rhizoctonia solani ag22 lp were studied in zoysia grass for 6 years. Characterization and survival of rhizoctonia solani ag22. Symptoms are seen on both dormant and actively growing zoysiagrass. This disease generally affects coolseason grasses during hot weather.
Rhizoctonia large patch disease of zoysiagrass and bermudagrass is caused by a fungus similar to the rhizoctonia fungus that causes brown patch disease of coolseason grasses bentgrass, tall fescue, etc. Rhizoctonia large patch is the most common and severe disease of warm season grasses bermudagrass, centipedegrass, seashore paspalum. Symptoms first start as small areas 12 inches where leaf blades assume a tanorange color. This is a text book example of large patch fungus rhizoctonia solani in zoysia grass. Causal agent large patch is a problem of zoysiagrass and most other warmseason turf and is caused by a cool temperature rhizoctonia disease r. The pathogen is favored by moderate temperatures and long dew periods in the spring, fall and during cool summers. Susceptibility of zoysiagrass germplasm to large patch. Most of it is due to atmospheric conditions, humidity, etc and are simply out of our control.
Zoysia large patch fungus in spring 2014, we had lots of issues with zoysia large patch fungus. Tommy cowetts on the lawn with growingreen talking about zoysia patch aka, large patch on zoysia grass. Large patch in turf nc state extension publications. Large patch zoysia patch of warmseason turfgrasses. Causal agent and disease cycle the fungus, rhizoctonia solani is the causal agent of large patch. Small, rounded spots of discolored, watersoaked grass appear on zoysia lawns. This fungus and several related species are responsible for numerous turfgrass diseases. Disease can develop rapidly when daytime temperatures are warm 75 to 90 f and humid, nighttime temperatures are above 60. What are the treatments for brown patch lawn disease. Large patch is a fungal disease of zoysiagrass zoysia japonica, z. Susceptibility of zoysiagrass germplasm to large patch caused by rhizoctonia solani article in hortscience.