Effect of high temperature during the late seed filling period on green stem disorder in soybean

•The effect of temperature on green stem disorder in soybeans was analyzed.•High temperature in the late seed-filling period was critical for green stem disorder.•Temperature in the critical period is correlated to green stem disorder in the field.•Sink limitation was not the cause of green stem disorder caused by high temperatures.•Global warming can promote green stem disorder by high temperatures in autumn.