News

Anthracnose

Anthracnose is a serious disease of Annual bluegrass (Poa annua L.)and Creeping bentgrass (Agrostis stolonifera).  The pathogen now known as Colletotrichum cereale, was formerly known as Colletotrichum graminicola.  Although related to some degree anthracnose is associated as either a foliar blight or a basal rot.

 

Foliar Blight

 

Factors that Influence Golf Ball Lie

The golf ball lie is critical to determining the playability of golf course fairways and roughs.  The common definition of golf ball lie is the amount of the golf ball that remains above the turfgrass canopy after the ball comes to rest.  A ball lie where it sits above the canopy produces a clean hit imparting backspin on the ball.  In situations where the ball may sit down into the canopy leaf blades can become the club and the ball causing the ball to “fly” upon being struck imparting little backspin.

 

Topdressing High Shoot Density Putting Greens

Sand topdressing helps control/dilute organic matter accumulation on putting greens.  The popularity of high shoot density creeping bentgrass (ex. Penn “A4”, Alpha, etc.) and bermudagrass ultradwarf (ex. Tifeagle) varieties make the incorporation of topdressing into greens difficult.  The inability to incorporate can result in much of the topdressing being removed by mowing.  Additionally, mower blades loose their sharpness resulting in poor mowing quality.

 

Taking Measure of Fertility Levels

Article by: Pamela Sherratt   With the beginning of spring it's time to start planning season fertilizer programs!   Important tasks carried out now in preparation for the season ahead may include a soil test. Conducting a spring soil test provides a historical record of the soil pH and soil nutrient status. This supplies information on how well last year’s fertility program provided for the need of the turf. It also provides information that is used to develop your fertility management plan for the current season. Soil pH and soil nutrient analyses are critical.

Infield Admendments

Calcined clay is a popular soil amendment used on baseball infields for water management and soil conditioning. Clay is heated at a high temperature, about 1500 degrees Fahrenheit to expand the clay forming calcined clay. On baseball fields calcined clay is used to fill in infield depressions caused by cleats and smooth the surface to provide a true baseball bounce, which contributes to the safety of the field. Calcined clay absorbs water that can help dry a field after a rainstorm, and firm the surface.

 

Selective Creeping Bentgrass Control

Creeping bentgrass is considered a weed on athletic fields and lawns. It produces a superb playing surface for golf and it has great recuperative potential, but it’s shallow roots and lack of wear tolerance make it unsuitable for most athletic sports.

 

Tenacity (mesotrione) is the first herbicide that results in rapid, easy to visualize reductions in weedy perennial grasses, including creeping bentgrass.  Best control, according to most research of creeping bentgrass, is achieved if three applications are made on 14-21 day intervals.

 

What are ERI Fungi?

Stressful turfgrass conditions lead to numerous maladies, many of which are sent to plant disease clinics to be identified.  One diagnosis that causes confusion is the presence of ectotrophic root-infecting (ERI) fungi.  These fungi are often associated with root rotting diseases that produce patch-like symptoms. 

Facts on Poa annua Flowering

Whether you like it or not, spring highlights the amazing ability of Poa annua to produce seed.  The ability to produce copious seed is an evasive characteristic of Poa annua's evolution of different survival strategies (Cline et al., 1993).   I think one of the most amazing characteristics of Poa annua, and also a detriment from a golfing perspective is the flowering ability of Poa annua under low mowing heights. 

Predicting Crabgrass Germination and Emergence

Crabgrass (Digitaria spp) is a major problem in both cool-season and warm-season turfgrasses As a general rule, crabgrass tends to be more of a problem in temperate climates and less of a problem in tropical regions. In temperate regions the most important and likely the first weed control practice of the year is the proper timing of a pre-emergent herbicide application for crabgrass.