Alabama: Nematode-Resistant Cotton Varieties – Video

    Cotton roots infected with root-knot nematodes swell in response to the infection. These knots serve as feeding sites where nematodes (microscopic worms) grow, produce more eggs and stunt the plant's growth. Photo: University of Georgia

    Dr. Kathy Lawrence discusses nematode-resistant cotton varieties in a new video from the 2020 Alabama Row Crops Short Course Video Series. She shares the latest research on cotton varieties and nematicides to combat reniform and root-knot nematodes in cotton. In reniform-infested fields, she observed an 83% reduction in reniform populations for PHY 332 W3FE, a reniform resistant variety, compared to PHY 340 W3FE, a non-reniform resistant variety, resulting in a two-fold increase in cotton yield.

    The following nematicides were most effective for increasing cotton yields in reniform-infested fields: 1) AgLogic (5 lbs/A in-furrow), 2) Propulse (10 oz/A in-furrow), and 3) Velum Total (14 oz/A in-furrow) + Vydate (17 oz/A at pinhead square). In root-knot infested fields, PHY 360 W3FE (a root-knot resistant variety) increased cotton yields by 26% compared to PHY 340 W3FE, a non-root knot resistant variety).

    For more information, watch Dr. Lawrence’s video at: https://cses.auburn.edu/2020-alabama-row-crops-short-course/




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