Palmetto. Diagnosing Lawn Disease: Photo Gallery Harmful microorganisms are lying dormant in lawns across America. Also, visit Michigan State University's Turf Disease identifier . This is a native St. Augustine grass chosen for better texture and color than more common St. Augustine grasses. Lawn diseases. With St. Augustinegrass, brown patch can look like a brownish interior patch with a yellow outer ring. Raleigh St. Augustine grass was well received by sod growers in the southeast of Florida. We laid down St. Augustine grass in the backyard. The major pest of St Augustine grass is the chinch bug. 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. Brown patch affects all types of grass, but is most common with St. Augustine. St. Augustine grass should only be watered once it is dry and showing signs of drought, typically every 5- 10 days. For example, downy mildew appears as white or … This is a tiny insect that pierces through the grass with needle-like mouth parts and sucks out the juices. We left for to visit family on the East Coast and when we returned we saw large brown spots of dead tan-colored grass… Insects That Damage St. Augustine Grass. The disease was named for the distinct symptom it produced. A few other fungal diseases sometimes affect St. Augustine grass, but the effects aren't normally severe. Various diseases can be the reason why your grass is dying or appearing as though it is dead. Check out my ultimate guide to St Augustine grass. The recommended depth to water St. Augustine grass is 4- 6 inches. St Augustine Grass Insect and Disease Problems. This grass has superior heat, shade, drought, cold, and frost tolerance. St. Augustine grass is prone to some diseases such as brown patch disease, gray leaf spot, and take-all root rot.. Brown patches of dead grass usually start appearing during fall and spring when the weather is warm and humid. St. Augustine grass is semi-drought tolerant, and does best when watering is done only as needed. Mosaic disease of St. Augustinegrass was first reported in the 1960s in sugarcane producing areas of Florida (rural Palm Beach County). Chinch bug saliva is toxic to the grass and will only accelerate the damage. 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. St. Augustine grass seed has not traditionally been easy to establish but new methods have made seeding a viable option. Our lawn experts find that the Raleigh variety seems to be the most susceptible to the disease. All it takes is a change in weather -- a warm, wet or dry spell -- for your green grass … The propagation of St. Augustine grass is usually vegetative through stolens, plugs and sod. 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