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Turf melting out
Turf Melting Out is caused by the fungal pathogen ''Dreschlera poae'', in the family Dematiaceae. It is a common problem on turfgrass and affects many different species. The disease infects all parts of the plant most commonly on golf course roughs, sports fields, and home lawns. There are two stages of the disease: the leaf blade infection and the crown and root infection〔http://www.msuturfdiseases.net%2Fdetails%2F_%2Fmelting_out_8%2F&h=NAQH7bS5g〕 Melting out occurs during the cool weather of April and May and is encouraged by high nitrogen fertility. The disease is spread by wind-blown or water splashed spores and survive in thatch.〔http://www.extension.purdue.edu/extmedia/bp/bp-103-w.pdf〕
==Hosts==
''Dreschlera poae'' thrives during spring conditions and affects many cool season turfgrass species such as bluegrasses (''Poa spp.''), bentgrasses (''Agrostis spp.''), ryegrasses (''Lolium spp.''), and fescues (''Fescua spp.''). Outbreaks are most common on golf course fairways and residential lawns consisting primarily of Kentucky bluegrass (''Poa pratensis''). However, newly seeded lawns and certain cultivars of Kentucky bluegrass are particularly susceptible. Some of the most susceptible cultivars include 'Kenblue', 'Mermaid', and 'Bar VV 0665'. This pathogen has also been known to attack a warm season grass, buffalograss (''buchloe dactyloides'') 〔http://www.plantpath.iastate.edu/files/SUL13.pdf〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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