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POSTERS: Biological Control II

P-038 - Use of biological products-based management programs for the control of sweet cherry diseases

Tuesday, August 5, 2025
9:30 AM - 10:15 AM HST
Location: Exhibit Hall 3
Abstract Text: Bacteria and pre- and postharvest fungal pathogens affect sweet cherry productions worldwide. Use of Pseudomonas protegens and other biological products could be a suitable alternative to control this diseases and decreasing agrochemical spraying. This study evaluated the impact of biological based management programs (BBP) to control disease in sweet cherry commercial orchard during two seasons. Half-hectare units were established under two BBP programs, another based only in chemical control and other considering the grower’s program strategy, in a sweet cherry cv. Sweetheart orchard. Population counts, incidence and severity measurements were conducted on cherry at specific phenological stages. Results showed that BBP, which included P. protegens, Bacillus spp. and Trichoderma spp., reduced populations of Pseudomonas syringae pv. syringae; Botrytis cinerea, and Alternaria spp. at specific phenological stages, with no differences regarding chemical and grower programs. There were no significant differences in bacterial canker incidence and severity among all management programs, but there were decreases of 87% for Alternaria spp. rot incidence and 60% for B. cinerea rot incidence in ripe fruit in the chemical program compared to the BBP during first and second seasons, respectively. These results support the inclusion of bioproducts in commercial cherry disease management programs.