Efficacy of In-Furrow Fungicides in Cotton Seedling Survival and Yield

K. S. McLean, J. F. Denison, and G. W. Lawrence


An in-furrow cotton seedling disease fungicide test was conducted on Delta Pine 90 cotton at the Northeast Louisiana University Layton Farm. Treatments consisted of an untreated control, Delta Coat AD, WECO 1046 + WECO 1059, WECO 1058, Ridomil PC, Ridomil 2E + Diathane, Start 10361A, Start 10377A, SM-9, Terraclor Super-X, and Terraclor EC. All treatments were applied at the manufacturers recommended rates in the seed furrow at planting. Cotton seedling stand, plant height, and yield were determined. Cotton seedling stand at 14 days after planting was significantly greater for the SM-9 and Start 10377 at 5.0 oz/1000ft compared to the control. By 42 days after planting, cotton stand was significantly greater in the SM-9, Start 10377 at all rates, DeltaCoat AD, Ridomil 2E + Diathane, and Terraclor EC treatments. Plant height measured at 120 days after planting found Delta Coat AD produced significantly taller plants with a mean height of 56.54 inches compared to 49.88 inches for Start 10377 at 7.4 oz/a. No significant differences were observed for seed cotton yields between all treatments. However, seed cotton yields were increased by SM-9, WECO 1046 + 1059, Start 10361A at 1.12 and 0.84 oz/1000 ft, and Terraclor EC by 536.8, 212.5, 130.8, 51.8, and 10.9 lb/a compared to the control.

Reprinted from Proceedings of the 1994 Beltwide Cotton Conferences pp. 254 - 255
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998