1. High Temperature and Cotton Yield Department of Crop and Soil Sciences
John Snider
University of Georgia
Department of Crop and Soil Sciences

2. Yield-Determining Factors
Genotype
Management
Environment

3. 2016 vs. Other Years Year Average Tmin Average Tmax Highest Tmin
Highest Tmax
No. Days
Tmin > 22°C
Tmax > 32°C
Yield
(lbs/acre)
2013
20.9
30.9
24.0
35.1 29 45
1496
2014
21.3
32.1
24.3
36.8 52 75
2058
2016
21.6
32.7
35.9 66 88
867

4. Yield Components

5. Yield Components
Lint Yield = Boll #/Acre × Seed #/Boll x Lint Weight/Seed

6. Yield Components
Lint Yield = Boll #/Acre × Seed #/Boll x Lint Weight/Seed

7. Yield Components
Lint Yield = Boll #/Acre × Seed #/Boll x Lint Weight/Seed

8. Anthesis
35 DAP
60 DAP
Ritchie et al., 2008

9. Squaring and Flowering
35 DAP
60 DAP
Ritchie et al., 2008

10. Yield Components
Lint Yield = Boll #/Acre × Seed #/Boll x Lint Weight/Seed

11. Fiber Development [0 DPA] Fiber Cell Initiation [0 to 20 DPA]
Fiber Elongation
[15 to 45 DPA]
Fiber Thickening
Fiber Thickening
Fiber Maturation
[45-50 DPA]

12. Thank You