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The development of winged forms in the cabbage aphid, Brevicoryne brassicae Linnaeus. I. The influence of population density, photoperiod and temperature

, : The development of winged forms in the cabbage aphid, Brevicoryne brassicae Linnaeus. I. The influence of population density, photoperiod and temperature. Ber. ohara Inst. landw. Biol, Kuraschiki, 12: pt

The following is based on the author's summary. The effects of population density on the development of winged forms in Brevicoryne brassicae (L.) were examined experimentally in Japan at constant temperatures of 20 and 25 degrees C., both with long (16-hour) and with short (8-hour) photoperiods. The rate of occurrence of winged forms tended to increase with increase in population density.


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