QUARANTINE DISINFESTATION OF LEMONS AGAINST BACTROCERA-TRYONI AND CERATITIS-CAPITATA (DIPTERA, TEPHRITIDAE) USING COLD-STORAGE

'Eureka' and 'Lisbon' lemons were artificially infested with immature life stages of Queensland fruit fly, Bactrocera tryoni (=Dacus tryoni Froggatt), or Mediterranean fruit fly, Ceratitis capitata (Wiedemann), and stored at 1 +/- 0.2-degrees-C. Dose-mortality data from infested fruit held in cold storage for up to 14 d showed that first-instar B. tryoni and second-instar C. capitata were the life stages most tolerant of cold. From >43,000 B. tryoni first instars and >30,000 C. capitata second instars, none survived to pupation after storage at 1-degrees-C for 14 d. Storage of lemons at 1-degrees-C for up to 32 d had no adverse effects on fruit quality.