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首页> 外文期刊>Journal of Turfgrass Management >Cultivar and nitrogen fertility interactions with diseases of centipedegrass
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Cultivar and nitrogen fertility interactions with diseases of centipedegrass

机译：品种和氮肥与with的疾病相互作用

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摘要

Centipedegrass (Eremochloa ophiuroides) is a popular turfgrass in the southeastern United States. It is desirable as a low-maintenance turf, but can be prone to diseases if nitrogen fertility is improperly managed. The objective of this experiment was to evaluate centipedegrass cultivars for differences in expression of dollar spot and centipede decline as affected by differences in nitrogen fertility levels. In a split-split plot arrangement, four cultivars were main plots, two nitrogen fertilitylevels were subplots, and differential disease treatments were sub-subplots. Disease treatments in 1994 and 1995 were either untreated or inoculation with Sclerotinia homoeocarpa. High nitrogen fertility treatment coupled with drought stress pre-disposedturf to a curvularia blight (caused by Curvularia lunata [Cochliobolus lunatus]) in 1993, and decline symptoms in 1995. Under the high nitrogen regime, turf density of cultivars TC 177 and TC 178 was better in 1994 prior to the onset of decline symptoms, while TC 312 and Common had comparatively denser turf after the onset of decline in 1995. Inoculation with S. homoeocarpa had little effect on turf density in 1994 and no effect in 1995. S. homoeocarpa was isolated more frequently from Common than fromthe other cultivars in 1995 but isolation frequency was not associated with decline symptoms when assessed either within cultivar or nitrogen fertility level.
机译：enti（Eremochloa ophiuroides）是在美国东南部流行的草皮草。作为低维护性草皮，这是理想的选择，但如果氮肥管理不当，则容易患病。该实验的目的是评估受氮肥水平差异影响的cent变种和美元spot表达的差异。在分割样地布置中，四个品种为主要样地，两个氮肥水平为亚样地，差异性疾病处理为亚样地。 1994年和1995年的疾病治疗是未经治疗或接种高果核盘菌。高氮肥力处理加上干旱胁迫在1993年使草皮易患弯曲毛霉病（由弯曲弯曲菌（Curvularia lunata [Cochliobolus lunatus]引起）），并在1995年出现症状下降。在高氮条件下，TC 177和TC 178品种的草皮密度为在出现下降症状之前的1994年更好，而TC 312和Common在1995年下降出现之后的草皮相对较密。高果链球菌的接种对1994年的草皮密度影响很小，1995年没有影响。在1995年与普通品种相比，普通品种的分离频率更高，但是在品种或氮肥水平上进行评估时，分离频率与下降症状无关。

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