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Control of target spot of tomato with fungicides, systemic acquired resistance activators, and a biocontrol agent

Author

Listed:
  • Ken Pernezny

    (University of Florida, Everglades Research and Education Center, Belle Glade, USA)

  • Peter Stoffella

    (University of Florida, Everglades Research and Education Center, Belle Glade, USA)

  • Janice Collins

    (University of Florida, Everglades Research and Education Center, Belle Glade, USA)

  • Amanda Carroll

    (University of Florida, Everglades Research and Education Center, Belle Glade, USA)

  • Audrey Beaney

    (University of Florida, Everglades Research and Education Center, Belle Glade, USA)

Abstract

Control of target spot of tomato, caused by the fungus Corynespora cassiicola (Berk. & Curt.) Wei., was studied in three seasons in southern Florida, USA. The strobilurin fungicide azoxystrobin and a combination product of mancozeb and fumoxate provided excellent control of target spot. In these treatments, accumulated disease severity values were only 10-15% of those in the untreated control and marketable yields were doubled. Excellent disease control also was achieved with acibenzolar-S-methyl, a systemic acquired resistance activator (SAR). This compound reduced defoliation of tomato plants by 42% compared to the control. An experimental compound, BAS 510 02, provided good control of target spot, reducing defoliation by 40% and increasing marketable yields by 34%. Harpin protein and Bacillis subtilis strain QST 713 were not effective for control of target spot.

Suggested Citation

  • Ken Pernezny & Peter Stoffella & Janice Collins & Amanda Carroll & Audrey Beaney, 2002. "Control of target spot of tomato with fungicides, systemic acquired resistance activators, and a biocontrol agent," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 38(3), pages 81-88.
    • Handle: RePEc:caa:jnlpps:v:38:y:2002:i:3:id:4855-pps
    DOI: 10.17221/4855-PPS
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