Grass - Knowledgebase Question

Orlando, Fl
Question by jhns982
September 23, 2010
What is the cause of many yellow areas on the lawn? The grass is turning yellow.What should I do?


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Answer from NGA
September 23, 2010

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Fungal diseases and chinch bug infestations are the main causes for yellowing spots in St. Augustine lawns. To check if chinch bugs are present in your lawn, push one end of a can with both ends removed into the ground about 2-3 inches down. Fill with soapy water and watch for 5 minutes. If chinch bugs are present they will float to the surface. It is important to check areas where the yellow spots and green grass meet in different areas. If you find no chinch bugs, there may be a disease developing. Carefully check the grass blades for red, black or rusty spots. If you still can't determine what is going on with your lawn, dig up some of the affected turf and take it your local cooperative extension office. Contact Orange County Cooperative Extension, 6021 S Conway Rd, Orlando, FL 32812-3604, (407) 254-9200.

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