<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>Cotton (<italic>Gossypium hirsutum</italic>) cultivar trials were conducted in four fields (6 trials total) with <italic>Meloidogyne incognita</italic> (Mi)/<italic>Fusarium oxysporum</italic> f. sp. <italic>vasinfectum</italic> (Fov) from 2019 to 2021. Cotton cultivars were divided into groups based on company/Mi resistance: S = susceptible to Mi; R-FM, R-DP, and R-PHY = resistance to Mi in FiberMax®, Deltapine®, and Phytogen® cultivars, respectively; ST 4946GLB2 (moderate resistance to Mi and observed field tolerance to Fov); and ST 5600B2XF (resistance to Mi). The S and R-FM groups had the highest transformed Mi densities LOG<sub>10</sub>(Mi + 1) (LMi = 3.22 and 3.01, respectively), while R-DP and R-PHY had the lowest LMi (2.21 and 1.85, respectively). Plant mortality (%) was higher for R-DP (28.1%) than for all other groups except ST 5600B2XF (24.8%). Mi-susceptible cultivars averaged 23.3% mortality. Relative yield (0-1 scale) was higher for ST 4946GLB2 (0.706) and R-PHY (0.635) than for R-DP (0.530), ST 5600B2XF (0.578), and S (0.491). All groups except R-DP averaged higher relative yield than the susceptible cultivars. ST 4946GLB2 had the lowest mortality (16.5%) and highest relative yield, while R-DP cultivars had the highest mortality and no difference in relative yield from the Mi-susceptible cultivars. The group of R-DP cultivars had excellent Mi resistance but were susceptible to Fov. No cultivars were identified with high resistance to Fov.</p></abstract>

Cotton (Gossypium hirsutum) cultivar trials were conducted in four fields (6 trials total) with Meloidogyne incognita (Mi)/Fusarium oxysporum f. sp. vasinfectum (Fov) from 2019 to 2021. Cotton cultivars were divided into groups based on company/Mi resistance: S = susceptible to Mi; R-FM, R-DP, and R-PHY = resistance to Mi in FiberMax®, Deltapine®, and Phytogen® cultivars, respectively; ST 4946GLB2 (moderate resistance to Mi and observed field tolerance to Fov); and ST 5600B2XF (resistance to Mi). The S and R-FM groups had the highest transformed Mi densities LOG10(Mi + 1) (LMi = 3.22 and 3.01, respectively), while R-DP and R-PHY had the lowest LMi (2.21 and 1.85, respectively). Plant mortality (%) was higher for R-DP (28.1%) than for all other groups except ST 5600B2XF (24.8%). Mi-susceptible cultivars averaged 23.3% mortality. Relative yield (0-1 scale) was higher for ST 4946GLB2 (0.706) and R-PHY (0.635) than for R-DP (0.530), ST 5600B2XF (0.578), and S (0.491). All groups except R-DP averaged higher relative yield than the susceptible cultivars. ST 4946GLB2 had the lowest mortality (16.5%) and highest relative yield, while R-DP cultivars had the highest mortality and no difference in relative yield from the Mi-susceptible cultivars. The group of R-DP cultivars had excellent Mi resistance but were susceptible to Fov. No cultivars were identified with high resistance to Fov.

Effects of Fusarium wilt on Cotton Cultivars with and Without <italic>Meloidogyne incognita</italic> Resistance in Fields

Journal of Nematology

This work is licensed under the Creative Commons Attribution 4.0 International License.

Effects of Fusarium wilt on Cotton Cultivars with and Without  Resistance in Fields

Cotton (Gossypium hirsutum) cultivar trials were conducted in four fields (6 trials total) with Meloidogyne incognita (Mi)/Fusarium oxysporum f. sp....

Effects of Fusarium wilt on Cotton Cultivars with and Without Meloidogyne incognita Resistance in Fields

Article Category: Research Paper

Published Online: Jul 07, 2022

Page range: -

Received: Feb 24, 2022

DOI: https://doi.org/10.2478/jofnem-2022-0017

Keywords
cotton, f. sp., Fusarium wilt, management, resistance

© 2022 Terry A. Wheeler, Jessica Dotray and Cecilia Monclova-Santana, published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Effects of Fusarium wilt on Cotton Cultivars with and Without Meloidogyne incognita Resistance in Fields

Article Category: Research Paper

Published Online: Jul 07, 2022

Page range: -

Received: Feb 24, 2022

DOI: https://doi.org/10.2478/jofnem-2022-0017

Keywordscotton, f. sp., Fusarium wilt, management, resistance

© 2022 Terry A. Wheeler, Jessica Dotray and Cecilia Monclova-Santana, published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Keywords
cotton, f. sp., Fusarium wilt, management, resistance