1. Turf Problems Quiz Pamela J. Sherratt

2. TURF GOES BROWN
FOR MANY REASONS
Biotic problems: weeds, pests and diseases
Abiotic problems: physiological stress and human error

3. How do we tell the difference?

4. Diagnostics - Pest Indicators
Numerical - how many insects? How many leaves damaged?
Quantitative - local environmental conditions

5. Diagnostics: Soil Temperatures
Weed seed germination:
Poa annua
Prostrate knotweed
Crabgrass
Goosegrass

6. Soil Temperatures for Annual Grass Germination.
Critical soil temperature*
Weed oF oC
Scientific Name
Large and smooth crabgrass
Digitaria sanguinalis and ischaemum
Goosegrass
Eleusin indica
Barnyardgrass
Echinochloa crusgalli
Foxtails 65 18
Setaria spp
Annual bluegrass 45 8
Poa annua
*Watschke, T.L Turfgrass weeds and their management. In Managing Turfgrass Pests.

8. Diagnostics - Soil & Tissue Testing
- Turfgrass testing lab

9. Turf Disease ID

10. Turf disease ID starts with
turfgrass ID

12. Differentiating Disease from Other Problems (fertilizer spill etc.)
Disease progresses
Disease does not grow in straight lines
Disease apparent on adjacent areas

13. Identifying Diseases: Signs, Symptoms & Spores
Anthracnose
Grey Leaf Spot
Brown Patch
Sign
Symptom
Spores

14. Weeds are Indicators Compacted soils Knotweed Clover Dandelion
Plantains
Crabgrass, goosegrass
Wet soils:
Nutsedge
Poa annua & P. trivialis
Low traffic
Creeping bentgrass

15. Weeds are typically the RESULT of poor turf
not
the CAUSE of poor turf

16. Turf Problem Quiz

17. HINT:
Tall fescue in July/August

19. HINT:
Perennial ryegrass in summer

21. Hint: P. ryegrass and crabgrass healthy, K. bluegrass dead
Fras
Hint: P. ryegrass and crabgrass healthy, K. bluegrass dead

22. April Emergence
First Frost

24. HINT:
July & August Problem

26. Kentucky bluegrass in July/August
HINT:
Kentucky bluegrass in July/August
Pic: UMass.edu

35. HINT:
Perennial ryegrass

40. HINT:
March time

45. HINT:
Perennial ryegrass in late summer

46. HINT:
First weed to emerge?

55. u.osu.edu/athleticfieldmanagement
@Grassybrit
Buckeye Turf