Thermal requirements and development of the Korean population of the potato leafminer, Liriomyza huidobrensis (Diptera: Agromyzidae)

The development of Liriomyza huidobrensis (Blanchard), is an important pest of potato, was examined at six constant temperatures (10,15, 20, 25, 27 and 30 degrees C) on kidney bean, Phaseolus vulgaris L. Results showed the temperature-related ecological niche of L. huidobrensis might be narrow. The total development period (egg to adult) decreased with increasing temperature from 15-27 degrees C, although no egg hatched at 10 degrees C and no pupae survived at 30 degrees C. The linear model estimated the lower developmental threshold of eggs, larvae, pupae, and total immature stage as 10.17,10.37, 9.08 and 9.64 degrees C, respectively, and the thermal requirement as 34.54, 65.51, 137.62 and 247.04 degree-days (DD), respectively. The development rates were fitted to Lactin's nonlinear model, and the lower, upper, and optimal temperatures for development were estimated as 9.8, 30.0 and 26.0 degrees C, respectively. Female sex ratio of the surviving individuals was 0.62. Thermal requirements and temperature thresholds can be used to forecast the occurrence, number of generations, and population dynamics of L. huidobrensis. (C) 2016 Korean Society of Applied Entomology, Taiwan Entomological Society and Malaysian Plant Protection Society. Published by Elsevier B.V. All rights reserved.