Hot-air quarantine treatment for mango infested with Caribbean fruit fly (Diptera: Tephritidae).
Sharp J. L.
Author Affiliation: Subtropical Horticulture Research Station, USDA, ARS, 13061 Old Cutler Road, Miami, FL 33158, USA.
Journal of Economic Entomology 85 : 2302-2304
Abstract : A single-stage forced-air quarantine treatment at 48 ± 0.3°C was developed to disinfest Florida-grown Mangifera indica (mangoes) of adults, eggs and larvae of Anastrepha suspensa. Treating infested fruits for 30-150 min with 48 ± 0.3°C forced air at a mean airflow rate of 0.75 m³/s reduced the number of surviving pupae that developed from treated eggs and larvae. Probit analysis of the data estimated that a mean treatment time of 136.7 min was needed to reach 99.9968% (probit 9) mortality when the mean ± SEM temperature next to the seed surface was 44.5 ± 0.5°C. A large-scale confirmatory test resulted in no survivors (based on pupae of normal appearance) when an estimated 106?053 larvae of A. suspensa in 7000 infested mangoes were heated with 48 ± 0.3°C forced air at an average airflow rate of 0.75 m³/s for 160 or 220 min, and the fruit pulp temperatures next to the seeds were 46.1 ± 0.4 or 46.5 ± 0.2°C, resp.