Rotylenchulus reniformis, Linford and Oliveira, 1940

Gordon, Kara L, Schrimsher, Drew W & Lawrence, Kathy S, 2022, Additional fertilizer and nematicide combinations on upland cotton to manage Rotylenchulus reniformis and Meloidogyne incognita in Alabama, Journal of Nematology 54 (1), pp. 1-15 : 7

Rotylenchulus reniformis field evaluation

Plant stand was not affected by the additional fertilizer or Vydate ® C-LV combinations ( Table 4 ). The additional fertilizer and nematicide combinations did not significantly increase root fresh weight at PHS + FB. Rotylenchulus reniformis eggs per gram of root were not significantly decreased when sampled at PHS + FB. The combination of a nematicide ST + (NH 4) 2 SO 4 + Vydate ® C-LV + Max-In ® Sulfur at PHS and FB had the lowest R. reniformis eggs per gram of root when sampled at PHS + FB. The combination of a nematicide ST + (NH 4) 2 SO 4 + Vydate ® C-LV at PHS supported a significantly larger lint yield than the treatments with no nematicide ST, which applied (NH 4) 2 SO 4 at PHS, 28-0-0-5 at PHS and the combination of a nematicide ST + 28-0-0-5 at PHS and FB (P ≤ 0.10). Lint yield was increased by 546 kg /ha, 603 kg /ha, 580 kg /ha or 31%, 34% and 33% with the combination of a nematicide ST + (NH 4) 2 SO 4 + Vydate ® C-LV at PHS when compared to the three lowest yielding combinations, (NH 4) 2 SO 4 at PHS, 28-0-0-5 at PHS and a nematicide ST + 28-0-0-5 at PHS and FB.

Mean profits for fertilizer applications of (NH 4) 2 SO 4 and 28-0-0-5 at PHS with no nematicides averaged $853.62 ( Table 5 ). A nematicide ST with an additional fertilizer application at PHS increased mean profit by $46/ha from an additional fertilizer alone. A nematicide ST with an additional application of fertilizer at PHS and FB increased profit by $32/ha from an additional fertilizer alone. Combinations with Vydate ® C-LV applied at PHS had an increased profit of $137/ha from an additional fertilizer alone. Fertilizer and nematicide combinations that included Vydate ® C-LV at PHS and FB had an increased profit of $48/ha. All combinations were compared to the mean profit of treatments of an additional fertilizer with no nematicides to determine increased profit per hectare. The combination of a nematicide ST + (NH 4) 2 SO 4 + Vydate ® C-LV at PHS had the greatest overall mean profit of $1175.87 which was significantly greater than the mean profit of (NH 4) 2 SO 4 at PHS, 28-0-0-5 at PHS and a nematicide ST + 28- 0-0-5 at PHS and FB.