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2. Turf melting out - Wikipedia

   en.wikipedia.org/wiki/Turf_melting_out

   Turf melting out begins as black to purple spots on the leaf blades. These spots eventually appear on the leaf sheaths. The fungus then begin to move down and invade the crowns and the roots of the plants. From far away, the turf appears yellow or blackish brown. The colors that appear on the turf directly reflect the nitrogen levels in the ...

3. Turf necrotic ring spot - Wikipedia

   en.wikipedia.org/wiki/Turf_necrotic_ring_spot

   Necrotic ring spot is a common disease of turf caused by soil borne fungi (Ophiosphaerella korrae) that mainly infects roots (4). It is an important disease as it destroys the appearance of turfgrasses on park, playing fields and golf courses .

4. Pythium volutum - Wikipedia

   en.wikipedia.org/wiki/Pythium_volutum

   When an area of the creeping bentgrass is affected, large dead spots in the turf are seen. [2] These symptoms are most often observed in the summer months when soil and surface temperatures are high. Because Pythium volutum is a root rotting pathogen, the ability of the creeping bentgrass to intake water is inhibited. When soil and surface ...

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6. Impatiens necrotic spot orthotospovirus - Wikipedia

   en.wikipedia.org/wiki/Impatiens_necrotic_spot...

   Impatiens necrotic spot orthotospovirus (INSV) is a plant pathogenic virus of the order Bunyavirales. It was originally believed to be another strain of Tomato spotted wilt virus , but genetic investigations revealed them to be separate viruses.

7. Ophiosphaerella - Wikipedia

   en.wikipedia.org/wiki/Ophiosphaerella

   Ophiosphaerella korrae, Ophiosphaerella narmari, and Ophiosphaerella herpotricha affect bermudagrass (Cynodon species), while the latter fungus also causes dead spot in buffalo grass (Bouteloua dactyloides). Ophiosphaerella korrae is a cause of necrotic ring spot in creeping red fescue (Festuca rubra). [3]