1. Genetic diversity among Ophiosphaerella agrostis strains causing dead spot in creeping bentgrass. 2. They are often treated as members of genus " Agrostis ". 3. Many internet sources describe Agrostis capillaris as being the tallest of the bent species. 4. Cross-pollinating " Agrostis gigantea " was even found at a distance of 21 kilometres. 5. This differs from Creeping Bent, Agrostis stolonifera in which it is pointed and up to 5mm long. 6. "Agrostis avenacea " is known elsewhere as an introduced species and sometimes a noxious weed. 7. Preferred hosts include various slender grasses, including " Muhlenbergia " and " Agrostis ". 8. However C E Hubbard describes its height as ranging from 10 to 70 cm high, whereas Agrostis gigantea is. 9. Newer cultivars of creeping bentgrass ( " Agrostis stolonifera " ) have been bred for dollar spot resistance. 10. Aggressiveness of Typhula ishi-kariensis isolates to cultivars of bentgrass species ( Agrostis spp . ) under controlled environment conditions.