Check out my ultimate guide to St Augustine grass. Mosaic disease of St. Augustinegrass was first reported in the 1960s in sugarcane producing areas of Florida (rural Palm Beach County). Palmetto. 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. Diagnosing Lawn Disease: Photo Gallery Harmful microorganisms are lying dormant in lawns across America. Lawn diseases. Application of the herbicide atrazine increases the susceptibility of St. Augustine grass to this disease. St Augustine Grass Insect and Disease Problems. All it takes is a change in weather -- a warm, wet or dry spell -- for your green grass … The disease was named for the distinct symptom it produced. 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… St. Augustine grass should only be watered once it is dry and showing signs of drought, typically every 5- 10 days. A few other fungal diseases sometimes affect St. Augustine grass, but the effects aren't normally severe. This grass has superior heat, shade, drought, cold, and frost tolerance. St. Augustine grass seed has not traditionally been easy to establish but new methods have made seeding a viable option. Raleigh St. Augustine grass was well received by sod growers in the southeast of Florida. Also, visit Michigan State University's Turf Disease identifier . For example, downy mildew appears as white or … The major pest of St Augustine grass is the chinch bug. The propagation of St. Augustine grass is usually vegetative through stolens, plugs and sod. Brown patch affects all types of grass, but is most common with St. Augustine. 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. sources enhance disease severity, as does compacted soil. We laid down St. Augustine grass in the backyard. The recommended depth to water St. Augustine grass is 4- 6 inches. This is a native St. Augustine grass chosen for better texture and color than more common St. Augustine grasses. Our lawn experts find that the Raleigh variety seems to be the most susceptible to the disease. 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 is semi-drought tolerant, and does best when watering is done only as needed. Chinch bug saliva is toxic to the grass and will only accelerate the damage. Insects That Damage St. Augustine Grass. Various diseases can be the reason why your grass is dying or appearing as though it is dead. 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