Refereed Publications

2010 Annual Research Report
February 26, 2011
Dollar spot severity as influenced by fungicide mode of activity and spray nozzle.
October 1, 2009
Dollar spot, caused by Sclerotinia homoeocarpa, is a severe disease of highly maintained turfgrass. Improving the efficacy of fungicides when applied in relatively low water volumes may be possible through...
Geographic distribution and rDNA-ITS region sequence of Waitea circinata var. circinata isolated from annual bluegrass in the United States.
September 1, 2009
Waitea circinata var. circinata is the causal agent of brown ring patch, an emergent disease of turfgrass in the United States. Forty-two isolates from annual bluegrass were...
Inhibition of Pythium spp. and suppression of pythium blight of turfgrass with phosphonate fungicides.
August 1, 2009
Pythium aphanidermatum and other Pythium spp. cause Pythium blight of turfgrasses in the United States. Phosphonate fungicides suppress Pythium blight when...
Safety of bispyribac-sodium on colonial bentgrass and influence on brown patch severity
July 1, 2009
Bispyribac-sodium can be used to selectively control ABG in stands of perennial ryegrass and creeping bentgrass. However, its safety is unknown when...
Salinity effects on seed germination and vegetative growth of greens-type Poa annua relative to other cool-season turfgrass species
March 1, 2009
Seed germination and vegetative growth studies were conducted to determine relative salinity tolerance of greens-type Poa annua L. compared with other cool-season turfgrass...
Suburban, and Rural Amenities of Grass.
January 1, 2009
Chapter 8 from Grassland: Quietness and Strength for a New American Agriculture.
Salacisia, a new genus of Tilletiales: reclassificationof Tilletia buchloeana causing induced hermaphroditism in buffalograss
January 1, 2008
For 119 y the fungal parasite Tilletia buchloe¨ana has been known to induce female sex organs (pistils) in male plants of buffalograss, making them hermaphrodite. Here we report the life cycle...
Addressing problems encountered in case-based teaching.
December 1, 2007
TURF 436 (Case Studies in Turfgrass Management) is the capstone course for turfgrass science majors at the Pennsylvania State University. Students are introduced to problems...
Seasonal Poa annua L. seedling emergence patterns in Maryland
March 1, 2007
Annual bluegrass (Poa annua L.; ABG) can be a major weed problem in golf course turf. Research-based information on the seasonal emergence patterns of ABG is limited. The objectives of this four-year field study..
Pesticide application research demonstrated at a field day event.
February 1, 2007
(J. of Extension, 2007) A field day event was used to demonstrate the value of proper pesticide application methods to turfgrass. A single fungicide was applied through...
Effect of spent mushroom substrate on seed germination of cool-season turfgrasses.
February 1, 2007
Spent mushroom substrate (SMS) is used by the turf industry in the northeastern United States for soil improvement. When tilled into soil at...
Selecting nozzles for fungicide spray applications.
June 1, 2006
(GCM, 2006) Using the right nozzle my save your grass...
Evaluation of fungicide and plant growth regulator tank-mix programmes on dollar spot severity of creeping bentgrass.
February 4, 2006
Dollar spot (Sclerotinia homoeocarpa F.T. Bennett) is a common and destructive disease of creeping bentgrass (Agrostis stolonifera L.). In 2003 and 2004, field studies were conducted to evaluate 14- and 21-day sequential...
Nitrogen source impact on dead spot (Ophiosphaerella agrostis) recovery in creeping bentgrass.
July 1, 2005
Limited information is available with regards to chemical and cultural management strategies for dead spot. Two field studies were designed...
Creeping bentgrass seedling tolerance to herbicide and paclobutrazol.
August 1, 2004
(HortScience, 2004) Natural organic fertilizers require microbial degradation for nitrogen (N) release, but their ability to promote rapid turfgrass establishment has not...
Smooth crabgrass control in perennial ryegrass and creeping bentgrass tolerance to quinclorac
July 1, 2004
Natural organic fertilizers require microbial degradation for nitrogen (N) release, but their ability to promote rapid turfgrass establishment has not been well documented in newly...
Soil amendments and fertilizer source effects on creeping bentgrass establishment, soil microbial activity, thatch, and disease.
June 1, 2004
Natural organic fertilizers require microbial degradation for nitrogen (N) release, but their ability to promote rapid turfgrass establishment has not been well documented in newly constructed sand-based...
Creeping bentgrass seedling tolerance to herbicide and paclobutrazol.
March 1, 2004
(GCM, 2004) Some herbicides and a plant growth regulator were not harmful when applied to creeping bentgrass seedlings four weeks after emergence.
Bacterial wilt: An enigmatic annual bluegrass disease of putting greens.
January 1, 2003
(GCM, 2003) Bacterial Wilt is difficult to identify and its causal organism is uncertain, but proper management practices can help prevent it and curtail its spread.
Geographic distribution, cultivar susceptibility, and field observations on bentgrass dead spot.
(Plant Disease, 2002) This project was designed to determine the susceptibility of field-grown bentgrass cultivars to BDS and to gather information regarding the geographic distribution and field conditions favoring the disease.
Reactivation of bentgrass dead spot and growth, pseudothecia production, and ascospopre germination of Ophiosphaerella agrostis.
(Plant Disease, 2002) Little is known about the biology of O. agrostis; hence the primary goal of this study was to determine some basic biological properties of the pathogen and epidemiological components of the disease.
A PCR-based method for the detection of Ophiosphaerella agrostis in creeping bentgrass
(Plant Disease, 2005) The main goal of this study was to develop a polymerase chain reaction based technique capable of quickly identifying O. agrostis within infected creeping bentgrass tissues.
Environmental influences on the release of Ophiosphaerella agrostis ascospores under controlled and field conditions.
Ophiosphaerella agrostis, the causal agent of dead spot of creeping bentgrass (Agrostis stolonifera), can produce prodigious numbers of pseudothecia and ascospores throughout the summer...
Genetic diversity among Ophiosphaerella agrostis strains causing dead spot in creeping bentgrass.
(Plant Disease, 2006) Little is known about the biology or genetic diversity of the pathogen. O. agrostis is unusual in that it produces prodigious numbers of pseudothecia...
Dead spot severity, pseudothecia development, and overwintering of Ophiosphaerella agrostis in creeping bentgrass.
Dead spot (Ophiosphaerella agrostis) is a damaging disease of young (≤6 years old) creeping bentgrass (Agrostis stolonifera)...
Environmental monitoring and exploratory development of a predictive model for dead spot of creeping bentgrass.
The objectives of this 3-year field study were to: (i) elucidate environmental conditions associated with the expression of...