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High Density Creeping Types
These varieties have the highest shoot density with a range of 2,200-2,600 shoots per decimeter squared. These are best adapted to golf course greens, croquet, tennis courts, and bowling tops. They often require frequent top dressing and mowing, and prefer low mowing heights of 125,000ths or less.
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Penncross Creeping Types
Expensive to produce seed due to parent production field established vegetatively. Open type with 1,000-1,100 shoots per decimeter squared. Continues to be used regardless of age and lack of improvements. Penncross requires high levels of nitrogen, which results in high thatch production and reduced disease resistance.
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Maritime-European Creepng Types
Limited market in continental climate due to poor adaptation for permanent turf. Shoot density range from 800-900 shoots per decimeter squared. These types have excellent application in mild maritime climates for permanent turf and have been used successfully in winter overseeding programs where small seed size, winter growth, and easy transition are desired.
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Dry-Arid Climate Creeping Types
Developed from germplasm collected from dry arid regions of the Western US. All have high shoot density ranging from 1,400-1,600 shoots per decimeter squared. These varieties are very susceptible to dollar spot, but have excellent turf quality and have been used successfully around the world.
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Transition Zone Creeping Types
Transition zone types have been developed over the past decade for improved turf quality and disease resistance versus Penncross. The material has range in shoot density of 1,000-1,600 shoots per decimeter squared. These varieties have improved resistance to dollar spot, fusarium, and brown patch.
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Highland Dryland Creeping Types
Highland Dryland bentgrass, Agrostis castellana, has been incorrectly referred to as a colonial bentgrass. It has large robust stolons, which under low height of cut and infrequent mowing, produce unacceptable “false crowning” in manicured turf. Highland continues to be used for low cost roadside and utility turf situations.
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Colonial Bentgrass Types
Compared to creepers, colonials are more upright with a weaker lateral growth habit. It has better wear tolerance at high height of cut (fairways) and is typically brighter green. Colonial type maintains better color in cool weather and has better resistance to dollar spot, but is more susceptible to brown patch than creeping bentgrass.
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Velvet Bentgrass Types
Velvet bentgrass is the densest of the bents used for turf and tend to have better heat, drought, and shade tolerance than creeping or colonial bentgrass. Compared to creepers, velvet has a brighter green color, better dollar spot and brown patch resistance, and is less prone to localized dry spot.