Inside and outside views of the geode. Geode (Greek Î³ÎµÏÎ´Î·Ï - ge-ÅdÄs, earthlike) are geological secondary structures which occur in certain sedimentary and volcanic rocks. They are themselves of sedimentary origin formed by chemical precipitation.
The Rhizoctonia solani fungus attacks zoysia grass and causes a disorder called large brown patch. Small, rounded spots of discolored, water-soaked grass appear on zoysia lawns.These damaged areas often have a yellowish ring of dying grass around their perimeters.oysia is a species of warm-weather grass native to Southeast Asia. Named after Karl von Zois, an 18th-century botanist from Austria, zoysia became popular with United States homeowners in the 1940s and 1950s, particularly in the southern United States, because these grasses perform well in warm climates.
B rown patch is a very common lawn disease that is caused by the fungus Rhizoctonia solani. It is very prevalent in warm and humid areas attacking all different types of grasses like St. Augustine grass and Kentucky bluegrass. The disease appears in circular patches of dead grass sometimes in diameters of many feet.ou can cure brown patch by using a contact fungicide. It is important that you treat the disease as soon as possible and continue to apply fungicide for several weeks after or as long as humid, warm weather persists.