Nematode Interactions with Weeds and Sugarcane Mosaic Virus in Louisiana Sugarcane

Authors

  • A. T. Showler
  • T. E. Reagan
  • K. P. Shao

Abstract

Weeds did not appear to serve as reservoirs for phytophagous Louisiana sugarcane nematode populations except for Criconemella spp., Meloidogyne spp., Tylenchorhynchus annulatus, and total phytophagous nematode densities were lower on weed-stressed cane and were accompanied by reduced accumulations of free cysteine, proline, and 13 other free amino acids in sugarcane. A significant weed-virus interaction for sugarcane free cysteine accumulation was detected; T. annulatus populations were highly correlated (r = 0.59, P = 0.001) with the weed-induced and virus-induced changes in free cysteine. Sugarcane nematodes interacted differently with the weed and virus stresses and changes in host plant stress-related free amino acid concentrations. Key words: free amino acid, Saccharum hybrid, sugarcane, sugarcane mosaic virus, Tylenchorhynchus annulatus, weed.

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Published

1990-01-15

Issue

Vol. 22, No. 1 (January 1990)

Section

Articles

License

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