UV-light and moths
jantsa at sci.fi
Sat Nov 14 11:50:22 EST 1998
To what kind of theory the luring effect of the UV-light is based on?
One theory I have heard is that the moths are escaping when they are
disturbed by predators/or somenthing else to the direction of the most
effective UV-light source. In the nature it is normally up which means
direction of sky. Also it seems that moths are navigating thru the forrest
using the sky (UV-source) it means to them "free way".
The ozone hole lets more UV-light go thru the athmosphere, so this pheomena
should make the UV-light trap less effective because there is now more UV-light
in the sky. Or could the effect be opposite to this. I have notified that
some moths come to smell traps (no lights) with larger numbers when the
sky is clear for a short moment. If the sky is clear all night long
the temperature is lower which reduces flight activity.
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