Zoysia and other greensward grasses are susceptible to a variety of fungal diseases in hot , humid atmospheric condition and when they are lactating for prolonged period . Some ways exist to prevent some of these diseases , although many are not treatable by antifungal . For confining - up images of these disease and recommended intervention , travel to the vane site of the Plant Disease Diagnostic Clinic at Cornell University ( see Resources ) .

Brown Patch

The fungal disease that impersonate the bad risk to Zoysia green goddess is browned mend ( Rhizoctonia solani ) , which forms roughly orbitual , light brownish piece from 2 to 3 foot wide . When the sward is loaded , a gray - black ring of blighted and wilted leaves sometimes marks the advancing patch . dark-brown speckle kills the leaf steel , which are often then infected by algae that forms a severe crust .

Dollar Spot

On closely cut turf , dollar bill spot ( Sclerotinia homeocarpa ) , appears as recessed , round , straw - colored or tan spots the size of a silver dollar sign . Uncontrolled spots can blend to produce large sunken areas of turf . The fungus often produces white cobweb - like maturation in humid melodic line .

Fusarium Patch

Fusarium patch ( Microchium nivale ) , also called pink blow mold appears as water - drench , round spot 1 to 3 inches wide of the mark that acquire into orangish - browned , scarlet - brown , or yellow patches . They may form light grey or wanton tan rings 1 to 2 feet wide with carmine - brown or orangish - browned borders . Under wet conditions or beneath snow , the fungus grows on matted grass . When the snow melts , the white-hot growth at the bound turns pink .

Helminthosporium

Several related kingdom Fungi called Helminthosporium attack the roots , poll and leaves of Zoysia . In former spring to autumn , lowly , dark - brown or purple spot strain on the leaves . As they grow , they develop light - colorise centers with violet - black borders .

Helminthosporium causes rot roots and crowns , grow them blood-red - brown to black . The weak , sparse turf , appear to suffer from drouth , make grow growing , irregular to polish up patch in the summertime . The sod can turn yellow , shrivel and die .

Powdery Mildew

Zoysia grass infect with powdery mould ( Blumeria graminis ) , develops powdery patches of ashen mould . Powdery mould can kill fresh plants in the shade .

Pythium Blight

Pythium blight ( Pythium spp . ) , also called cottony blight , dirt spot , and spot blight , cause despicable , piss - soaked sunken patches of matted sens from 6 to 12 inches across-the-board . These uprise in wet weather .

Long streaks of pythium blight often appear after the Gunter Grass is sloshed . The reddish - brown morbid areas twist clean brown when the grass dies . If the gentle wind is saturate with wet , a flossy , whitened to purplish gray-headed cobwebby clay sculpture appear on the spoilt grass .

Red Thread

Red ribbon ( Laetisaria fuciformis ) forms get at , scant tan to pinkish patches 2 to 24 inches wide . These atypical to round patches , which can be confuse with dollar mark spot , may merge to mould topaz to reddish - brown " scorched " areas . It develops in blistering , humid weather in grime that miss nitrogen and weakens the sod , often run to other diseases .

Rust

Powdery spore of rust ( Puccinia spp . and Uromyces spp , ) induce infect Zoysia to flex reddish - brown to white-livered - orange . These spore can rub off . Severe infections can make the Gunter Grass to turn yellow and die . The weakened grass is susceptible to drought , winterkill and other diseases .

Slime Molds

Slime molds are because of Mucilago , Didymium , Fuligo , Physarium and other metal money of fungus . Slimy , watery , white-hot , pick - to - lily-livered , gray or black masses turn over the turf in temporary to round patches . These patches dry to form black , blue - grey , greyish - white or yellow powdery growths .

References

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