Dehydration of Ampelomyces quisqualis CPA-9 conidia by adding biodegradable coatings: Biocontrol activity against powdery mildew and physical characterization of the formulated product

Ampelomyces quisqualis CPA-9 was reported as a promising biocontrol fungus against powdery mildew on cucurbits, although its formulation had not been developed. The present work aimed to develop fluidised-bed spray-dried of that included film-forming compounds, which could improve the behaviour microorganism under practical conditions. Film forming efficacy, shelf life, physical stability function aw, and solubility in water were determined. A based native potato starch pregelatinised carrier binder obtained, sucrose plus skimmed milk used protective compounds. Dehydrated conidia maintained efficacy fresh cells Podosphaera xanthii zucchini leaves, significantly reduced compared with control treatment. Despite results obtained for glassy state guaranteed powder sticking caking processes, life product limited 4 months storage at °C. On other hand, mainly dispersible, due high concentration reduces product. Results this work, such developed product, low cost employed substances, ability rehydrated powder, finally effectiveness dehydration process, confirmed potential Further studies verify improvement conditions or enlarge BCA should be done consider biocontrol-based cucurbits mildew.