WSU Extension

Hortsense

Lawn and Turf
 
Disease
2,4-D damage 
Algae 
Anthracnose/Basal crown rot 
Brown blight 
Brown patch 
Curvularia blight (Fading out) 
Dog injury 
Dollar spot 
Fairy ring and mushrooms 
Leaf spot 
Microdochium patch (Pink snow mold) 
Moss 
Necrotic ringspot 
Powdery mildew 
Pythium crown and root rot 
Red thread 
Rusts 
Septoria leaf spot (Tip blight) 
Slime molds 
Take-all patch 
Thatch 
Typhula blight (Gray snow mold) 
Yellow patch 
Insect
Ants 
Billbugs 
Chinch bugs 
Cutworms 
European crane fly 
Leafhoppers 
Moles 
Sod webworm 



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Caption:
Photo by: Beth Staley
  
Lawn and Turf : 2,4-D damage
(revision date: 3/12/2014)


Biology
Bentgrasses are commonly used for lawns in western Washington and found as weeds in eastern and western Washington. Both weedy species and cultivated varieties are susceptible to damage by 2,4-D, an ingredient often found in turfgrass fertilizer-herbicide ("weed and feed") products and in broadleaf weed killers used in lawns. Well-established, healthy grasses may tolerate some damage, but young plants and those stressed by environmental conditions are very susceptible to damage. 2,4-D is translocated within the plant tissues and also damages the root system of affected grasses, affecting nutrient and water uptake. Early symptoms may resemble those caused by root disease or drought injury and include yellowing and dieback of leaves followed in severe cases by death of the plants. Other factors which may affect the amount of damage occurring include temperature (higher temperatures often result in more damage) and the particular 2,4-D formulation used (esters are more damaging than amines).
Management Options

Non-Chemical Management
  • Do not apply products containing 2,4-D to desirable bentgrass. If products containing 2,4-D must be used, select only those which are formulated for use on bentgrass and follow label directions regarding application rates very carefully.
  • Do not apply herbicides during hot weather.
  • Do not apply herbicides to newly seeded grasses.
  • Stressed plants are more susceptible to herbicide damage. Maintain healthy turf through proper fertilization, irrigation, and mowing practices.
Select non-chemical management options as your first choice!

Chemical Management

None recommended

Images

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Caption:
Photo by: Beth Staley