Abstract
Spring dead spot (SDS) of bermudagrass (Cynodon dactylon) is primarily caused by Ophiosphaerella herpotricha and Ophiosphaerella korrae in North America. These two species respond differently to numerous management practices, grow optimally at different soil pH ranges, and differ in aggressiveness. Understanding the Ophiosphaerella species distribution in regions where SDS occurs will allow turfgrass managers to tailor their management practices toward the predominant species present. A survey was conducted in the Mid-Atlantic United States in which 1 to 14 samples of bermudagrass expressing SDS symptoms were taken from 51 athletic fields, golf courses, or sod farms across Delaware, Maryland, North Carolina, and Virginia. DNA was isolated from necrotic root and stolon tissue, amplified using species-specific primers, and detected in a real-time PCR assay. At least one isolate of O. herpotricha was recovered from 76% of the locations, and O. korrae was recovered from 73% of the locations. O. herpotricha was amplified from 55% of the samples, whereas O. korrae was amplified from 37% of the samples. There were distinct regions in the Mid-Atlantic in which either O. herpotricha or O. korrae was predominant. O. herpotricha was predominant in western Virginia, central North Carolina, Delaware, and eastern Maryland. However, O. korrae was predominant in central Maryland and Virginia as well as eastern Virginia and North Carolina. O. herpotricha was isolated from certain cultivars more frequently than O. korrae and vice versa. These survey results elucidate the geographic distribution of O. herpotricha and O. korrae throughout the Mid-Atlantic United States.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
O. herpotricha was recovered from 76% of sampled locations.
- Taxon
- bermudagrass
Cynodon dactylone1 - Interactor
- O. herpotrichaOphiosphaerella herpotrichae0pathogen
- Outcome
- O. herpotricha was recoverede0
- Value
- 76%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At least one isolate of O. herpotricha was recovered from 76% of the locations”
e1“bermudagrass (Cynodon dactylon)”
Claim · model-written summary
O. korrae was recovered from 73% of sampled locations.
- Taxon
- bermudagrassCynodon dactylone1
- Interactor
- O. korraeOphiosphaerella korraee0pathogen
- Outcome
- O. korrae was recoverede0
- Value
- 73%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“O. korrae was recovered from 73% of the locations”
e1“bermudagrass (Cynodon dactylon)”
Claim · model-written summary
O. herpotricha was amplified from 55% of samples.
- Taxon
- bermudagrassCynodon dactylone1
- Interactor
- O. herpotrichaOphiosphaerella herpotrichae0pathogen
- Outcome
- O. herpotricha was amplifiede0
- Value
- 55%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“O. herpotricha was amplified from 55% of the samples”
e1“bermudagrass (Cynodon dactylon)”
Claim · model-written summary
O. korrae was amplified from 37% of samples.
- Taxon
- bermudagrassCynodon dactylone1
- Interactor
- O. korraeOphiosphaerella korraee0pathogen
- Outcome
- O. korrae was amplifiede0
- Value
- 37%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“O. korrae was amplified from 37% of the samples”
e1“bermudagrass (Cynodon dactylon)”
Claim · model-written summary
O. herpotricha predominated in western Virginia, central North Carolina, Delaware, and eastern Maryland.
- Taxon
- bermudagrassCynodon dactylone1
- Interactor
- O. herpotrichaOphiosphaerella herpotrichae0pathogen
- Outcome
- O. herpotricha was predominante0
- Setting
- western Virginia, central North Carolina, Delaware, and eastern Marylande0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“O. herpotricha was predominant in western Virginia, central North Carolina, Delaware, and eastern Maryland”
e1“bermudagrass (Cynodon dactylon)”
Claim · model-written summary
O. korrae predominated in central Maryland and Virginia and eastern Virginia and North Carolina.
- Taxon
- bermudagrassCynodon dactylone1
- Interactor
- O. korraeOphiosphaerella korraee0pathogen
- Outcome
- O. korrae was predominante0
- Setting
- central Maryland and Virginia as well as eastern Virginia and North Carolinae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“O. korrae was predominant in central Maryland and Virginia as well as eastern Virginia and North Carolina”
e1“bermudagrass (Cynodon dactylon)”
Claim · model-written summary
The two pathogen species differed in frequency across certain cultivars.
- Taxon
- bermudagrassCynodon dactylone1
- Material
- certain cultivarse0
- Interactor
- O. herpotrichaOphiosphaerella herpotrichae0pathogen
- Second interactor
- O. korraeOphiosphaerella korraee0pathogen
- Outcome
- isolated from certain cultivars more frequentlye0
- Direction
- more frequentlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“O. herpotricha was isolated from certain cultivars more frequently than O. korrae and vice versa”
e1“bermudagrass (Cynodon dactylon)”