Language selection

Search

Seed and shoot treatments and the ecology of biological control agents for bacterial and fungal diseases of tomato and pepper

Project code: MU03-PATH03

Project Lead

Diane Cuppels - Agriculture and Agri-Food Canada

Objective

To assess biological alternatives to the chemical management of bacterial spot and the fungal diseases anthracnose and early blight in field tomato and pepper

Summary of Results

The objective of this study was to provide efficacy and ecological data and application technologies to support the Canadian introduction of biopesticides commercially-available in the U.S. for control of bacterial spot (Xanthomonas campestris pv. vesicatoria groups A, B, C, D), anthracnose (Colledotrichum coccodes) and early blight (Alternaria solani) on field tomatoes (peppers). All three diseases are now controlled by multiple applications of the heavy metal-based bactericide copper hydroxide and the fungicides chlorothalonil, captan or mancozeb, all of which pose environmental health risks. The biopesticide products that were selected for study were: Streptomyces griseoviridis K61 (Mycostop®), Streptomyces lydicus WYEC108 (Actinovate®), and Pseudomonas fluorescens A506 (BlightBan®). Research was needed on these products as there were no application technologies developed for these diseases, no efficacy data and no Canadian studies regarding their fate/persistence in the environment.

Conclusions: In this study, we (1) used in vitro and in planta assays to confirm the activity of these agents against Ontario isolates of the three pathogens and to determine the best method for applying them to tomato and pepper plants, (2) ran efficacy trials at the London AAFC research farm, and (3) tagged the control agents, as well as the bacterial spot pathogens (all 4 groups of Xanthomonas campestris pv. vesicatoria), with fluorescent protein in order to perform colonization and environmental fate/survival studies.

Data generated in this project support submission for registration new uses of biocontrol products in Canadian agriculture.

Report a problem on this page
Please select all that apply:

Date modified: