Lawn diseases. The propagation of St. Augustine grass is usually vegetative through stolens, plugs and sod. A few other fungal diseases sometimes affect St. Augustine grass, but the effects aren't normally severe. The disease was named for the distinct symptom it produced. sources enhance disease severity, as does compacted soil. This is a tiny insect that pierces through the grass with needle-like mouth parts and sucks out the juices. Palmetto. St. Augustine grass seed has not traditionally been easy to establish but new methods have made seeding a viable option. St. Augustine grass is semi-drought tolerant, and does best when watering is done only as needed. Diagnosing Lawn Disease: Photo Gallery Harmful microorganisms are lying dormant in lawns across America. We laid down St. Augustine grass in the backyard. During the summer, St. Augustine grass always has a few spots, but the overall health of the turfgrass is not affected unless the grass is placed under severe stress. Our lawn experts find that the Raleigh variety seems to be the most susceptible to the disease. Also, visit Michigan State University's Turf Disease identifier . Application of the herbicide atrazine increases the susceptibility of St. Augustine grass to this disease. Insects That Damage St. Augustine Grass. Mosaic disease of St. Augustinegrass was first reported in the 1960s in sugarcane producing areas of Florida (rural Palm Beach County). If you don’t know the grass varieties in the lawn, you can still click through the disease list and look for symptoms and photos. With St. Augustinegrass, brown patch can look like a brownish interior patch with a yellow outer ring. The recommended depth to water St. Augustine grass is 4- 6 inches. This grass has superior heat, shade, drought, cold, and frost tolerance. St Augustine Grass Insect and Disease Problems. Various diseases can be the reason why your grass is dying or appearing as though it is dead. St. Augustine grass should only be watered once it is dry and showing signs of drought, typically every 5- 10 days. Raleigh St. Augustine grass was well received by sod growers in the southeast of Florida. The major pest of St Augustine grass is the chinch bug. Brown patch affects all types of grass, but is most common with St. Augustine. We left for to visit family on the East Coast and when we returned we saw large brown spots of dead tan-colored grass… Chinch bug saliva is toxic to the grass and will only accelerate the damage. Check out my ultimate guide to St Augustine grass. This is a native St. Augustine grass chosen for better texture and color than more common St. Augustine grasses. If the disease has been active for a long time, the inside of the patch may recover, leaving a ring of dead or thin grass around it. 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