ABSTRACT
Six tests were conducted during the two-year period, 1998 to1999, to determine the physiological "cut-out" stage of cotton within Louisiana's environment. Nodes above white flower (NAWF) plant growth stages were used to monitor crop development. Seedcotton yields were harvested from an upper and lower zone of plants divided at target stages of NAWF 5-6, NAWF 4-5, NAWF 3-4, and NAWF 2-3. Plants within those target stages remained non-damaged had complete square removal in the upper zone, or had the main-stem terminal severed between the two harvested zones. In general, these data show yields in the upper harvested zones for NAWF 5 and NAWF 4 target stages contribute significantly to yield depending on the level of square loss in the upper zone. Yield compensation by bolls in the lower zone for square loss in the upper harvested zone was a significant factor in these experiments.
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