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

Ken Pernezny, Peter Stoffella, Janice Collins, Amanda Carroll and Audrey Beaney
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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

Plant Protection Science, 2002, vol. 38, issue 3, 81-88

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.

Keywords: target spot; Corynespora cassiicola; tomato; Lycopersicon esculentum; biocontrol agents; systemic acquired resistance; fungicides (search for similar items in EconPapers)
Date: 2002
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpps:v:38:y:2002:i:3:id:4855-pps

DOI: 10.17221/4855-PPS

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