EFFECTS OF TEMPERATURE ON DEVELOPMENT OF BACTROCERA-ZONATA (SAUNDERS)(DIPTERA, TEPHRITIDAE)

We measured the developmental times and survivorship of the immature s tages of Bactrocera zonata (Saunders) and the longevity, preovipositio nal period and fecundity of adult flies at five temperatures between 1 5-degrees-C and 35-degrees-C. Egg hatch significantly increased with t emperature from 15-degrees-C (51%) to 2 5-degrees-C (91.3%), and then decreased to zero at 3 5-degrees-C. No larvae completed development at 15-degrees-C or 35-degrees-C. Larval and pupal survival were greatest at 25-degrees-C, as were female fecundity (eggs laid) and fertility ( % egg hatch). Developmental times for all stages were inversely relate d to temperature. Egg development was fastest at 2 5-degrees-C and 30- degrees-C, although larval, pupal and ovarian development were fastest at 30-degrees-C.