Introduction

Scientists with the LSU AgCenter annually evaluate cotton varieties in official variety trials (OVTs) at several locations across the state. Cotton varieties are managed using practices that follow LSU AgCenter recommendations and demonstrate commercial operations as closely as possible. All entries in the trials are replicated four times, and results are compiled for average performance after one or two years of testing. In 2025, 27 varieties were entered by commercial seed companies in the OVTs. Locations of these trials included the LSU AgCenter Dean Lee Research and Extension Center, Alexandria; LSU AgCenter Macon Ridge Research Station, Winnsboro; LSU AgCenter Red River Research Station, Bossier City; and LSU AgCenter Northeast Research Station, St. Joseph (Table 4). Yield data for 2025 across locations is summarized in Table 5. Individual location summaries are in Tables 6 through 11. Descriptions of abbreviations used in data tables are defined in Table 3. In addition to the OVTs, five on-farm core block demonstrations were conducted throughout the cotton-growing areas of Louisiana by LSU AgCenter extension agents (Tables 12-16). This information should be used to supplement but not replace OVT results.