LONG-TERM ECOLOGICAL STUDIES WITH LIGHT TRAPS THEIR PRACTICAL AND SCIENTIFIC VALUE

The food producers in this world, the farmers, know better than most that we humans are not the only creatures around who need food and shelter. Numerous species of insects are active in natural and in man-made environments. Most of these are completely harmless to man, do not take their crops for food or act as vectors for diseases either for man himself or for his livestock. Most of these insects lead their lives in a way such that they have no negative influence at all on the economy. They are simply a delight for the eye such as so many of the beautiful moths and butterflies are highly beneficial to man in their activities as pollinators or as predators on insect pests.