Plant Protect. Sci., 2002, 38(3):81-88 | DOI: 10.17221/4855-PPS

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

Ken Pernezny, Peter Stoffella, Janice Collins, Amanda Carroll, Audrey Beaney
1 University of Florida, Everglades Research and Education Center, Belle Glade, USA
2 University of Florida, Indian River Research and Education Center, Ft. Pierce, USA

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

Published: June 30, 2002  Show citation

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Pernezny K, Stoffella P, Collins J, Carroll A, Beaney A. Control of target spot of tomato with fungicides, systemic acquired resistance activators, and a biocontrol agent. Plant Protect. Sci. 2002;38(3):81-88. doi: 10.17221/4855-PPS.
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