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Last Modified: 10-Mar-2008
Copyright © 2004, University of Kentucky, College of Agriculture, Department of Plant Pathology
  
             
Plant: Creeping Bentgrass (Agrostis stolonifera 'Penncross') (Poaceae) Back to List
Disease/Disorder: Basal rot Anthracnose
Causal agent: Colletotrichum sp. (fungus)
Signs: Several dark, spore-producing bodies called “acervuli” can be seen in the images.
The last three images shows a fungal structure called an "appressorium".
Symptoms: Turfgrass on greens appears melted-out in spots of varying sizes.
Total image number: 17
      
 
     
 
   
 
     
 
     
 
     
 
     
                             
  Plant: Creeping Bentgrass (Agrostis stolonifera 'Crenshaw') (Poaceae) Back to List
Disease/Disorder: Dollar spot
Causal agent: Sclerotinia homeocarpa (fungus)
Signs: Incubation produces conditions favorable for much mycelial growth.
Symptoms: Small, circular dead areas in turfgrass.
Total image number: 7 		     
 
 
     
                           
Plant: Fescue, tall (Fescuta arundinacea) Poaceae Back to List
Disease/Disorder: Brown patch
Causal agent: Rhizoctonia solani (fungus)
Signs:
Symptoms: Irregular tan blotches on leaf blades.
Total image number: 3 		     
 
     
 
     
                           
Plant: Bermudagrass (Cynodon dactylon) Poaceae Back to List
Disease/Disorder: Take-all
Causal agent: Gaeumannomyces graminis var. graminis (fungus)
Signs: ectotrophic hyphae and lobed hyphopodia
Symptoms: fungus colonizing rhizomes and possibly the roots
Total image number: 8 		     
 
 
 
     
                           
Plant: Ryegrass, perennial (Lolium perenne) Poaceae Back to List
Disease/Disorder: dead areas colonized by a fungus
Causal agent: Leptosphaerulina (fungus)
Signs: In the first image the sexual spore stage is seen as “ascospores” within an “ascus”.
Symptoms: Dead portions of leaf blades are being colonized by the fungus.
Total image number: 4 		     
 
     
                           
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