Influence of Temperature on Development and Fecundity ofLiriomyza trifolii(Burgess) (Diptera: Agromyzidae) on Celery

The development times of the immature stages, oviposition rate, and fecundity were determined for Liriomyza trifolii (Burgess) on celery at 35, 30, 25, 20, and 15°C. Regression equations relating temperature ( X ) to development rates ( Y ) for the egg, larval, and pupal stages were Y = 3.43X − 44.11 (25, 20, and 15°C), Y = 0.70X − 5.87 (35, 30, 25, 20, and 15°C), and Y = 0.76X − 7.79 (30, 25, 20, and 15°C), respectively. Pupal survival was very low (9.4%) at 35°C as compared with the lower temperatures (≥80%). Maximum oviposition rate (38.67 eggs per female per day) and fecundity (405.67 eggs per female) were attained at 30°C. Low oviposition rate and fecundity at 15°C indicated that this temperature was near the threshold of activity for the adult.