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Lower development threshold temperatures (LDT) of gall midges (Diptera: Cecidomyiidae) were directly determined by comparing developmental stages before and after incubation of galls for a definite period under a range of temperatures sufficient to cover the borders of the linear response. The LDT was determined to be 15 and 17 °C, respectively, for the soybean-pod gall midge, Asphondylia yushimai...