Comparative Effects of Kelp Preparations and Ethoprop on Nematode-Infected Bermudagrass

  • A. C. Tarjan
  • J. J. Frederick
Keywords: Bermudagrass, Kelp, Seaweed, Ethoprop


A 'Tiflawn' bermudagrass [Cynodon dactylon (L.) Pers.] area at the University of Florida campus Percy Beard Track in Gainesville was treated with various kelp preparations and ethoprop. The grass roots were parasitized mainly by Belonolaimus longicaudatus Rau, 1958; and sporadically by Hemicriconemoides wessoni Chitwood and Birchfield, 1957; Trichodorus christiei Allen, 1957; Pratylenchus neglectus (Rensch, 1924); Hoplolaimus galeatus (Cobb, 1913); Helicotylenchus erythrinae (Zimmermann. 1904); Xiphinema vulgare Tarjan, 1964; and Criconemoides sphaerocephalus Taylor, 1936. Materials used were soluble seaweed (Maxicrop(?)), kelp meal (Maxicrop(?)), liquified seaweed (PanaSea(?)) alone and with Zip(?) spray adjuvant or Aqua Gro(?) soil penetrant. Cytex(?) cytokinins, Ekol(?) leaf mold, and ethoprop. Two months after treatment, ethoprop treatment resulted in a significantly (P=0.10) higher grass yield than any of the other test materials. Ethoprop-treated plots had some significant redu