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Performance of NuCOTN with Bollgard™

Keith Jones, Tom Kerby, Harry Collins, Tom Wofford, Marc Bates, Jim Presley, Janet Burgess, Bob Beuhler, Randy Deaton


NuCOTN 33 and NuCOTN 35 contain the Bollgard gene Bacillus thuringiensis (Bt), developed by Monsanto. Delta and Pine Land Company has field tested these two new varieties in paired comparisons at 52 locations during the past two years. NuCOTN varieties were not sprayed for tobacco budworm, cotton bollworm, or pink bollworm. Averaged over all tests, NuCOTN varieties had a yield of 1041 lbs/A lint compared to 885 for the recurrent parents sprayed according to scouting recommendations. Seed size was increased 9 percent and seedling vigor increased 15 percent for NuCOTN 33B compared to DP 5415. Both NuCOTN varieties showed increased retention of early bolls, but still had increased vegetative growth during the season resulting in taller plants at the end of the year than their recurrent parents. NuCOTN 33B produced fiber with lower micronaire than DP 5415. Value of fiber from NuCOTN varieties trended higher than the recurrent parents.

Reprinted from Proceedings of the 1996 Beltwide Cotton Conferences pp. 46 - 48
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998