What is one way to determine the ideal time for defoliation?

Determining the ideal time for defoliation in cotton is crucial for optimizing yield and quality. The optimum condition is often assessed by the percentage of open bolls. When 60% of the bolls are open, it suggests that a significant portion of the crop is mature and ready for harvest. This level indicates that the plant is nearing the end of its life cycle, making it a suitable time for defoliation. Proper timing in this phase helps to ensure that the remaining bolls mature effectively while facilitating easier harvesting by removing excess foliage that can hinder machinery and lead to increased moisture and trash in the cotton fibers.

While the color of the leaves, soil moisture level, and temperature of the air can provide useful information about plant health and environmental conditions, they are not as direct indicators of the optimal timing for defoliation compared to the percent of open bolls. Focusing on the maturation of bolls allows for a more targeted approach to managing the defoliation process effectively.