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ARS Home » Southeast Area » Fort Pierce, Florida » U.S. Horticultural Research Laboratory » Citrus and Other Subtropical Products Research » Research » Research Project #440476

Research Project: Soil Amendment Effects on Tomato Bacterial Spot

Location: Citrus and Other Subtropical Products Research

Project Number: 6034-22000-046-001-S
Project Type: Non-Assistance Cooperative Agreement

Start Date: Sep 1, 2021
End Date: Aug 31, 2026

The objective of this NACA is to determine the effect of anaerobic soil disinfestation (ASD) and other organic amendments on a foliar tomato disease. In a randomized, replicated field study, it was observed that plants grown in ASD treated soil experienced a lower incidence of bacterial spot on tomato. The objective of this project is to determine if this phenomenon occurs consistently through replicated testing and observation in a greenhouse controlled environment. Additionally, soil will be sampled post Xanthomonas spp. inoculation to determine if treated soil is detrimental to pathogen survival in soil.

Tomatoes will be grown under greenhouse conditions in amendment-treated and non-treated soil and inoculated with Xanthomonas spp., and then observed until plants begin to fruit. The plants will be rated weekly for disease. Soil samples will be taken post inoculation, a week post inoculation, and at the end of the studies to determine if soil treatment affects pathogen survival.