Abstract
True wireworms (Coleoptera: Elateridae) and false wireworms (Coleoptera: Tenebrionidae) are common pests of cotton (Gosssypium hirsutum L.) on the Texas High Plains. Wireworms as larvae damage cotton by feeding on the roots, hypocotyl, and cotyledon and reducing plant stand. A field study was done with the objective to determine how seeding rate in the presence of wireworms affects plant stand and yield of cotton lint. Seeding rates evaluated per 0.3-m row were 1.5 seeds (48,433/ha), 2 seeds (64,583/ha), 3 seeds (96,865/ha), and 4 seeds (129,167/ha). Increasing seeding rate resulted in significantly greater plant density. The percentage of seeds that established into plants, however, did not vary significantly among seeding rates. In 2018 and 2019, 28-38 and 60-63% of seeds of all seeding rates established plants. Seeding rate did not significantly affect the plant height, number of main-stem nodes, position of 1st fruiting node on the main stem, or lint yield. Results of the study indicated increasing seeding rate in wireworm-infested fields might increase plant stand in cotton, but not necessarily the lint yield. Lint yirld ranged from 354.35 ± 29.65 to 398.46 ± 12.48 kg/ha in 2018 and 615.66 ± 33.70 to 735.05 ± 79.40 kg/ha in 2019.
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