论文信息 - OBSERVATIONS ON THRESHOLD INTENSITY AND SENSITIVITY TO DIFFERENT WAVE LENGTHS OF PHOTOPERIODIC RESPONSES IN THE COLORADO BEETLE (LEPTINOTARSA DECEMLINEATA SAY)

OBSERVATIONS ON THRESHOLD INTENSITY AND SENSITIVITY TO DIFFERENT WAVE LENGTHS OF PHOTOPERIODIC RESPONSES IN THE COLORADO BEETLE (LEPTINOTARSA DECEMLINEATA SAY)

The threshold intensity of white light for photoperiodic responses of the Colorado beetle is below 0,1 lux (0,4 ergs/cm2/sec.). Above this value, the responses increase with the intensity until above 5 lux (20 ergs/cm2/sec.) they remain more or less constant. Experiments with filtered light (423–675 mμ) and infrared (> 700 mμ) revealed that even 675 mμ is clearly active.

J. Wilde | H. Bonga

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