Southern Turfgrass Diseases. Bermudagrass leaf spot.
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Transcript of Southern Turfgrass Diseases. Bermudagrass leaf spot.
Southern Turfgrass DiseasesSouthern Turfgrass Diseases
Bermudagrass leaf spot
Stolon Rot ofStolon Rot ofSt. AugustinegrassSt. Augustinegrass
Spring dead spot in bermudagrass
Turfgrass ProblemsTurfgrass Problems
Physiological Cultural Insect Large Animal (People) Disease
Physiological Cultural Insect Large Animal (People) Disease
Disease DiagnosisDisease Diagnosis
Host
Time
Symptoms
Pathogen ID
Host
Time
Symptoms
Pathogen ID
Envi
ronm
ent
Envi
ronm
entH
ostH
ost
PathogenPathogen
DiseaseDisease
PathogensPathogens
Fungi
Nematodes
Viruses
Fungi
Nematodes
Viruses
Brownpatch in zoysiagrass lawnBrownpatch in zoysiagrass lawn
Brownpatch in St. Augustinegrass
Brownpatch in bermudagrass lawnBrownpatch in bermudagrass lawn
Brownpatch symptoms distinct boundary between Brownpatch symptoms distinct boundary between healthy and diseased grasshealthy and diseased grass
Brownpatch symptoms showing rotted tissueBrownpatch symptoms showing rotted tissuewhere shoot attaches to stemwhere shoot attaches to stem
Closeup showing rotted shoot tissueCloseup showing rotted shoot tissue
Brownpatch in St. AugustinegrassBrownpatch in St. Augustinegrass
Rate of A.I./ *Ratings for Brownpatch Activity
Fungicide 1,000 sq. ft. 11/25/85 11/11/86 11/6/97 11/30/88 3/9/89
PCNB 12 oz. 1.0 1.0 1.3 1.0 1.3
Benomyl 2 oz. 7.3 6.7
Chipco 26019 2 oz. 4.0 5.2 5.3 2.0 4.2
Daconil 4 oz. 8.0 5.2 4.0
Prostar 2 oz. 1.0 1.7 1.5 3.5
Banner 2 oz. 2.0 3.5
Check 9.0 8.0 8.3 4.0 8.0
Rate of A.I./ *Ratings for Brownpatch Activity
Fungicide 1,000 sq. ft. 11/25/85 11/11/86 11/6/97 11/30/88 3/9/89
PCNB 12 oz. 1.0 1.0 1.3 1.0 1.3
Benomyl 2 oz. 7.3 6.7
Chipco 26019 2 oz. 4.0 5.2 5.3 2.0 4.2
Daconil 4 oz. 8.0 5.2 4.0
Prostar 2 oz. 1.0 1.7 1.5 3.5
Banner 2 oz. 2.0 3.5
Check 9.0 8.0 8.3 4.0 8.0
Bermudagrass leaf spot symptoms
Closeup of bermudagrass leaf spot symptomsCloseup of bermudagrass leaf spot symptoms
Dollar spot in bermudagrassDollar spot in bermudagrass
Closeup of dollar spot symptomsCloseup of dollar spot symptoms
Closeup of dollar spot symptoms in early morning before sunlight
Dollar spot symptoms on leaf blades
St. Augustine decline symptoms (SAD)St. Augustine decline symptoms (SAD)
St. Augustine decline symptoms (SAD)St. Augustine decline symptoms (SAD)
Healthy leaf (left) – SAD (middle) –Healthy leaf (left) – SAD (middle) –Iron chlorosis (right)Iron chlorosis (right)
St. Augustine declineSt. Augustine decline
Pythium blight in ryegrass
Spring Dead SpotSpring Dead Spot
Bermudagrass
Winter
Bermudagrass
Winter
Spring dead spot in bermudagrass
Spring dead spot in bermudagrassSpring dead spot in bermudagrass
Rhizoctonia myceliumRhizoctonia myceliumCausal organism for brownpatchCausal organism for brownpatch
HelminthosporiumHelminthosporium
Take-all patch fungal organismTake-all patch fungal organism
PythiumPythium blight blightMycelium and sporesMycelium and spores
Lightning injury on golf greenLightning injury on golf green
Gray leaf spot in St. AugustineGray leaf spot in St. Augustine
Gray leaf spot in St. AugustineGray leaf spot in St. Augustine
Gray leaf spot in St. AugustineGray leaf spot in St. Augustine
Rust in a zoysia lawnRust in a zoysia lawn
Nematodes in bermudagrassNematodes in bermudagrass
NematodesNematodes
All grasses
(Bermudagrass, zoysiagrass)
55º F - Moist
All grasses
(Bermudagrass, zoysiagrass)
55º F - Moist
Nematode injury on a golf greenNematode injury on a golf green
Bermudagrass declineBermudagrass decline
Bermuda DeclineBermuda Decline
Bermuda declineBermuda declineEarly symptomsEarly symptoms
Bermuda declineBermuda decline
Bermuda declineBermuda declineNote absence of rootsNote absence of roots
Take-all patch in bermudaTake-all patch in bermuda
Take-all patch in bermudaTake-all patch in bermuda
Take-all patch in St. AugustineTake-all patch in St. Augustine
Fairy RingsFairy Rings
All grassesAll grasses
Fairy ring fungus in lawnFairy ring fungus in lawn
RhizoctoniaRhizoctonia blight in zoysia blight in zoysia
RhizoctoniaRhizoctonia blight in zoysia blight in zoysia
RhizoctoniaRhizoctonia blight in zoysia blight in zoysia
NigrosporiaNigrosporia stolon rot stolon rot
NigrosporiaNigrosporia stolon rot stolon rot
NigrosporiaNigrosporia stolon rot stolon rot