PATOGENIC VARIABILITY OF Exserohilum (Helminthosporium Pass.) turcicum (Setosphaeria turcica) ON SORGHUM IN THE BAJIO, MEXICO

Authors

  • Victoria Ayala-Escobar
  • Seiji Osada-Kawasoe
  • Jesús Narro-Sánchez
  • Sergio Sandoval-Islas

Keywords:

Exserohilum turcicum, leaf blight, Sorghum bicolor L. Moench, Sorghum halepense, Zea mays L.

Abstract

Special forms of Helminthosporium turcicum in corn (Zea mays L.) exist in The Bajio region causing damage in sorghum (Sorghum bicolor L. Moench.). One hundred and forty field isolates of H. turcicum were obtained and inoculated on seedlings of corn, sorghum and Johnson grass (Sorghum halepense). On the basis of pathogenicity, three special forms were determined: Setosphaeria turcica f sp. sorghi, specific for sorghum and Johnson grass; S. turcica f sp. zea, for corn; and S. turcica f sp. complexa in sorghum and corn or sorghum and Johnson grass. No isolate was pathogenic to all the three hosts.

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Published

30-06-1997

Issue

Vol. 31 No. 2 (1997): 1997-abr-jun

Section

Plant Protection

License

Agrociencia is published every 45 days, in an English format, and it is edited by the Colegio de Postgraduados. Mexico-Texcoco highway Km. 36.5, Montecillo, Texcoco, Estado de México, CP 56264, Telephone (52) 5959284427. www.colpos.mx. Editor-in-Chief: Dr. Fernando Carlos Gómez Merino. Rights Reserved for Exclusive Use: 04-2021-031913431800-203, e-ISSN: 2521-9766, granted by the National Institute for Author Right.