On zoysiagrass, large patch severity increases as mowing height is decreased from 1. Most of it is due to atmospheric conditions, humidity, etc and are simply out of our control. However, the fungus that attacks zoysiagrass and bermudagrass grows best at cooler temperatures and. Large patch development is favored by thick thatch, excess soil moisture and poor drainage. Augustinegrass, zoysiagrass, and bermudagrass are particularly susceptible. Fungicides marketed for homeowner application may not be as effective as those marketed to commercial lawn care operators. Large patch fungus rhizoctonia solani is a coolseason disease of turfgrass. Large patch of zoysiagrass oklahoma state university. Augustine, and bermuda when the weather turns cool and wet in late summer and into fall. Large patch is a fungal disease of zoysiagrass zoysia japonica, z. Chinch bug and hunting billbug outbreaks were also noted on several lawns in. Large patch of zoysiagrass kansas state university.
My zoysiagrass lawn was beautiful now what should i do. In general, azoxystrobin or pyraclostrobin will control brown and large patch for 28 days. Tommy cowetts on the lawn with growingreen talking about zoysia patch aka, large patch on zoysia grass. This disease was formerly called brown patch, the same disease that affects. This disease is caused by the same fungus that causes brown patch in many cool season. Zoysiagrass lawn maintenance calendar nc state extension. It is still a good idea to treat in fall and spring for large patch. Although relatively free from most pests and diseases, zoysia grass isnt without. This makes it a popular choice for many homeowners. Although it is relatively free from most diseases and pests, the most common zoysia grass issue is large patch funguscalled zoysia patch in zoysia lawns.
Brown patches in my lawn the zoysia farm nurseries blog. Spring timing application should be targeted near 50% greenup of zoysiagrass. Zoysia grass many factors can result in dead or thin spots in a warmseason lawn. The fungal disease that poses the worst danger to zoysia grass is brown patch rhizoctonia solani, which forms roughly circular, light brown patches from 2 to 3 feet wide. Patches can expand to several feet in diameter figure 2. Large patch is favored by excessive nitrogen in the fall and spring, poor soil drainage, overirrigation, excessive thatch accumulations, and low mowing heights. The fungus, rhizoctonia solani is the causal agent of large patch. Large patch symptoms may occur anytime during the growing season, but they are most common in spring and fall as zoysia, centipede, and st. Most fungus and disease are caused by thatch buildup, over fertilizing, hot humid temperatures, poor drainage and circulation. Brown patch for cool season grasses rhizoctonia solani dollar spot sclerotinia homoeocarpa large patch rhizoctonia solani. Symptoms vary depending on the turfgrass species and mowing height. It is consequently an expensive disease to control, and to my eye, one of the most unsightly. December through february skip to december through february. Aelmi can provide fungicides that are almost always applied on a curative basis for controlling this unwanted visitor.
Control of large patch can require fungicide application to the entire golf course. Read the label carefully and use the rate and timing that is indicated. Xzemplar fungicide basf turfgrass turf grass care products. Large brown patch of zoysia lawns missouri botanical garden. How to fix fungus in the lawn fungus fighter grass pad. Causal agent large patch is a problem of zoysiagrass and most other warmseason turf and is caused by a cool temperature rhizoctonia disease r. Large brown patch is used to describe the disease in zoysiagrass. Large patch in transition zone zoysia and bermuda fungicide solutions for large patch. The rhizoctonia solani fungus attacks zoysia grass and causes a disorder called large brown patch. Get free shipping on qualified fungicide lawn disease control or buy online pick up in store today in the outdoors department.
The prime conditions for large patch to occur on warm season grasses include. Susceptibility of the cultivar, management practices and weather conditions determine the degree of injury. Sep 21, 2017 zoysiagrass will tolerate partial sun to partial shade, according to the university of illinois extension hortanswers. Nov 04, 2015 tommy cowetts on the lawn with growingreen talking about zoysia patch aka, large patch on zoysia grass. Excessive shade contributes to turfgrass stress and increased. Zoysia diseases tips for dealing with zoysia grass problems. Excessive nitrogen fertility, improper mowing, excess thatch, poor drainage, excess watering, andor wet, overcast days in spring, fall, or winter can lead to outbreaks of this disease. Zoysia is a warmseason grass thats easy to care for and ishighly versatile and drought tolerant. Cool season turfgrasses, such as bentgrass, fescue, perennial ryegrass and bluegrasses. Also, a considerable amount of zoysia grass and bermudagrass sod is produced in the state. Only issue i have seen on it is dollar spot when it is not getting enough nitrogen. Turfgrass that is also exces sively irrigated, has abundant thatch, or poor air circulation. This publication contains important information on the biology of the causal agent. For zoysiagrass, applications should be initiated in the fall.
Large patch zoysia patch of warmseason turfgrasses. We do carry an organic fungicide, npp broad spectrum fungicide. Emerald is one of the most disease resistant varieties of zoysia. Dow eagle 20ew fungicide 16 ounce control liquid formula. Jan 09, 2015 most fungus and disease are caused by thatch buildup, over fertilizing, hot humid temperatures, poor drainage and circulation. Zoysia brown patch areas often grow together like a reverse pangea, quickly forming irregular patches of brown, blighted grass, sometimes 20 feet or more in diameter. There are lawn fungicides available to control brown patch. In certain situations where large patch has been prevalent yearly, a preventative fungicide application may be needed starting in early october to stay ahead of the disease. A good rule of thumb to follow on either cool or warmseason grasses is to initiate fungicide sprays when nighttime low temperatures reach 60 f.
Augustine are either entering or breaking from winter dormancy. Zoysia is an easycare, warmseason grass that is highly versatile and drought tolerant, making it popular for many lawns. 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. Unlike harsh and devastating pesticides, fungicides have been developed that target large patch and prevent its development without harming other plants. Fungicide applications made to lawns now in the spring will protect your healthy grass from large patch expansion, but will not magically cure zoysia that has already been infected. Although fungal spores of brown patch cannot be fully eliminated, keeping zoysia healthy will make it less susceptible to the disease. Large patch affects most warmseason turf grasses growing in.
Trinity fungicide provides broadspectrum disease control, including exceptional control of patch diseases like brown patch and large patch. Fungicide lawn disease control lawn care the home depot. However, zoysia grass problems do pop up on occasion most often from zoysia diseases like brown patch. Its very common to see in early spring and late fall as the zoysia is going into or coming out of winter dormancy. Irrigate according to label directions after application of granular products. Large patch, caused by rhizoctonia solani ag 22lp, affects the sheaths and stems of japanese lawngrass jlg. Although it is relatively free from most diseases and pests, the most common zoysia grass issue. In spring 2014, we had lots of issues with zoysia large patchfungus. Large patch is difficult to control with traditional fungicide sprays because much of the applied fungicide solution remains on. Large patch disease in zoysia can pop anytime during the growing season when cool wet conditions prevail. Fungicide applicaton should be made prior to the occurrence of infection. Dec, 2016 zoysia patch grows in the cool weather of spring and fall. Due to spring and fall diseasepromoting environmental conditions across georgia.
Zoysia diseases tips for dealing with zoysia grass. Reduced mowing heights result in a more dense turf stand, which may create a more favorable environment for large patch development by reducing air movement and increasing humidity in the lower turf canopy. Issues with zoysiagrass lawns missouri environment and. Large patch, also sometimes referred to as brown patch, is active from the late summer through the following spring when grasses. This is a text book example of large patch fungus rhizoctonia solani in zoysia grass. Rhizoctonia large patch is the most common and severe warm season grass disease in georgia and the united states as a whole. Until recently, this disease was known as brown patch fungus.
Patch pro absorbs through the leafy tissue of the infected plant and moves through the plants vascular system to eliminate diseases, such as powdery mildew, blight, and rust. Before you make this mistake, consider the many other causes. The other three fungicides will control the diseases for 14 days. Large patch of zoysia is a disease that can wreak havoc on any lawn during relatively cool and wet conditions. The most severe cases of zbp occur on turf that is receiving closelyspaced summer irrigation. It is not uncommon to see rings of yellow or brown turf with apparently healthy turf in the center. To control brown patch, fertilize zoysia moderately in summer and if you irrigate, do it in very early morning.
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. The following fungicides have been successful in suppressing large patch of zoysiagrass in this region of the country and are labeled for this use. Large patch in turf nc state extension publications. But i see it on zoysia japonica and not on zoysia matrella. In general, zoysiagrass is an easily maintained turfgrass, but. You can typically identify this zoysia disease by its distinct brown ring that encircles a green center. Large patch disease is caused by a soilborne fungus called rhizoctonia solani. Dec 08, 2014 this is a text book example of large patch fungus rhizoctonia solani in zoysia grass. Large patch is a new name for an old disease of warmseason turfgrasses. Large patch is the most damaging disease of centipede lawns in eastern north carolina. It is the primary disease of zoysiagrass in the transition zone and is commonly referred to as zoysia patch.
Apr 12, 2020 zoysia is a warmseason grass thats easy to care for and is highly versatile and drought tolerant. In georgia, large patch disease of turfgrass is most common in the fall and in the spring as grass is entering or leaving dormancy. Extended cool and saturated conditions in spring can cause widespread outbreaks, so a fungicide application is generally recommended. Large patch zoysia patch of warmseason turfgrasses turfgrass grown under high nitrogen fertility that is applied too late in the year or very early in the spring is more prone to the development of large patch. The importance of fungicide against large patch in zoysia grass. This disease is most likely to be observed from november through may when temperatures are. Small, rounded spots of discolored, watersoaked grass appear on zoysia lawns. It begins as small circles of 6 inches across and can grow as large as twenty feet in diameter. Oct 06, 2015 large patch is the most damaging disease of centipede lawns in eastern north carolina. Mirage stressgard highly effective for preventative large patch in fairways and tees. Augustinegrass, and zoysiagrass across the state of georgia.
When the turf is wet, a grayishblack ring of blighted and wilted leaves sometimes marks the advancing patch. Applying fungicide treatments after fungus is spotted is always a flip of a coin if it will actually help control an active fungus, when spores have already multiplied and become. Zoysia lawns thrive in moist, slightly acid to neutral, welldrained soil with an ideal ph of 6. Large patch can also appear in shaded areas and wet areas in midsummer. Although it is relatively free from mostdiseases and pests, the most common zoysia grass issue is large patch funguscalledzoysia patch in zoysia lawns. Large patch warmseason lawn solutions bayer environmental. Identification and control of rhizoctonia large patch in. This fungicide also offers unmatched value for superintendents. Dow eagle 20ew fungicide 16 ounce control liquid formula disease control.
Xzemplar fungicide offers quick and reliable control of. Large patch on zoysiagrass turfgrass disease updates for. Large patch disease of zoysiagrass rhizoctonia solani. Resist the first reaction many gardeners have of wanting to spray for a disease. Zoysia large patch fungus butler landscape and design. Fungus diseases of your zoysia lawn include dollar spot disease and turfgrass rust. Zoysia patch fungus is caused by a soilborne fungus called rhizoctonia solani r. Louis and jefferson city area in the last two years. The disease is most common in the early spring and late fall as the turf is entering winter dormancy or breaking dormancy. Turf masters lawn care zoysia patch fungus lawn disease. Large patch rhizoctonia solani ag 22lp severity on. Large patch disease of zoysiagrass is caused by a soilborne fungus called. If brown large patch disease is a chronic problem, apply a fungicide as a preventive see pest control recommendations for turfgrass managers, ag408. Zoysia is a warmseason grass thats easy to care for and is highly versatile and drought tolerant.
Large patch is an occasional disease of warmseason turfgrasses hybrid bermudagrass, zoysiagrass, and st. Augustinegrass, applications should be initiated when soil temperatures decline to 80f for 5 or more consecutive days, which could be midaugust in some years. Rhizoctonia large patch disease of zoysiagrass and. Zoysiagrass slowly refills the damaged areas during the summer. Rhizoctonia large patch disease of zoysiagrass and bermudagrass. These dead patches of grass start small but can quickly spread in warm conditions.
Sep 11, 2019 fungicides can be difficult to rely upon for controlling brown patch and large patch in the home lawn, but regular applications can vastly improve appearance. Large patch disease may be sweeping the nation, especially around atlanta, but most grass experts recommend a highly effective form of treatment. Fungicide applications made to lawns in spring will protect your healthy grass from large patch expansion, but will not magically cure zoysia that has already been infected. Fungicides are available for large patch control, but must be applied on a preventative basis. Patch interior becomes sunken, and injured turf appears thin with a tan, yellow or orange color. Identification and control of rhizoctonia large patch in georgia. Trinity fungicide broad spectrum disease control basf. Brown patch is probably the most prevalent zoysia grass disease, with patches of zoysia dying off. Correcting these conditions and if necessary the application of a fungicide can eliminate most fungus and disease.