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POSTERS: Chemical control

Control of blue mold of apples by Academy application via thermal fogging
Carmen Collazo-Gonzalez - Syngenta Crop Protection. Eric Tedford- Syngenta Crop Protection

Academy™ fogging formulation is a new Syngenta fungicide for the control of storage rots of pome fruits. A mixture of fludioxonil and difenoconazole, (FRAC code 12 and 3, respectively), applied via thermal fogging, provides outstanding control against storage diseases such as gray mold, bull's eye rot and blue mold. The causal agent of blue mold is Penicillium expansum, which is the most common pathogen of apples in storage. This project aimed to evaluate crop safety of Academy on apples, assess the residue levels of its active ingredients, and to confirm its efficacy against Penicillium expansum. Apples were placed in a storage shipping container within storage bins arranged in an RCDB experimental design with three replicates. The treatments were three different rates of Academy compared to difenoconazole solo and an untreated inoculated check. Treated fruits were left sealed for 8-24 hours. After treatment, a subsample of fruits underwent residue testing while the rest of the fruits were kept for nine days at 23°C and 100% humidity after inoculation. Disease ratings took place at six, seven and nine days after treatment. Results showed that Academy is safe on apples, and it can reduce the severity of blue mold. Academy is an additional option to support a growing trend towards thermal fogging in the pome market. Academy applied via thermal fogging offers the advantage of excellent control of postharvest decay, plus the added benefits of a reduced amount of fungicide needed, and virtually no leftover disposable waste to manage.