Temperature Relationships of Cotton Yield

Temperature has a strong influence on overall cotton yield. However, the effects upon cotton yield differ depending on when the temperature stress occurred. By using grower survey information, temperature data, and statistical analysis, we supported previous research that first flower is the most critical stage for yield, but most significant when night temperatures exceeded 75F. Modern Bt cotton cultivars showed a greater significance from the effects of temperature when compared to conventional cotton strains, which failed to show any significance. Irrigated and non-irrigated fields also showed significance for different growth periods at which they are more sensitive.