Submitted to: Meeting Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 7/9/2005
Publication Date: 7/9/2005
Citation: Lawrence, K., Balkcom, K.S., Smith, R., Price, A.J., Arriaga, F.J., Jones, J.R., Usery, S., Lawrence, G.W. 2005. Evaluation of tillage and experimental nematicides on meloidogyne incognita in cotton. In: Proceedings Society of Nematologists, July 9-13, 2005, Ft. Lauderdale, Florida. p. 49.
Technical Abstract: The effect of tillage and two experimental nematicides on Meloidogyne incognita populations and cotton plant growth, development and yield were observed in a cotton trial conducted at the Auburn University, E. V. Smith Research Station in 2003 and 2004. The plot area had been a tillage cover crop test for the previous 10 years. The two tillage regimes were conventionally tilled or no tilled. Nematicide treatments consisted of an at plant application of aldicarb, thiamethoxam, imidacloprid, and a non-treated control. The numbers of thrips and the resulting insect damage index were reduced (P < 0.05) by all the nematicide treatments in both tillage regimes as compared to the control. Plants were taller (P < 0.05) in the no tillage plots as compared to the conventional tillage plots at 21 and 35 DAP. The numbers of M. incognita were reduced by all nematicides at 60 and 90 DAP in the conventional tillage plots. No reductions in numbers of nematodes were observed in the no tillage treatments. Gall ratings averaged 3.5 in conventional tillage plots as compared to 4.1 in no tillage plots; however, aldicarb reduced (P < 0.05) gall ratings when compared to thiamethoxam and imidacloprid. Seed cotton yield was increased (P < 0.05) by aldicarb under conventional tillage as compared to the experimentals and the control; however, under the no tillage system imidacloprid increased (P < 0.05) yields over all other treatments.