Response of Four Kenaf (Hibiscus cannabinus L.) Plant Introductions to Meloidogyne incognita Race 3

  • G. W. Lawrence
  • C. L. Webber
  • K. S. McLean
Keywords: Fiber Crop, Hibiscus cannabinus, Kenaf, Meloidogyne incognita, Plant Introductions


Kenaf plant introductions (PI468074, PI468075, PI468076, PI468077) were evaluated in the greenhouse for their host response to Meloidogyne incognita (Kofoid & White) Chitwood race 3. Five-day-old seedlings were inoculated with 5 000 eggs and juveniles/500 cm soil and maintained for 60 days. Uninoculated plants served as controls. Kenaf cv. Everglades 71, a parent of the PI's, was included for comparison. Plant height, shoot and root weights of PI468077 were significantly reduced by M. incognita. Plant growth of PI468075 was not reduced by the nematode. Meloidogyne incognita reproduced on all PI's and Everglades 71. Reproductive factors (Rf = final population/initial population) were greater than 14 for all PI's.