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.
Butterfly Bush Has Brown Leaf Spots. Growers are often alarmed when leaf spots appear suddenly and spread across leaf surfaces. Buddleia leaves with spots can be caused by a few different problems, including fungal disease and sap-sucking pests. butterfly bush with spotted leaves should be checked carefully from top to bottom before treatment, just to be sure youâve fingered the right culprit. Advertisement. Fungal leaf spots and downy mildew cause many widespread spots, ranging in color from yellow to tan and even black or brown.