The loss of insect diversity - a commentary by the German Society for General and Applied Entomology (DGaaE).
The worldwide decline of insects over the last decades has been proven by numerous studies. It has a massive impact on biodiversity, ecosystem services and the basis of our food production. The German Society for General and Applied Entomology (DGaaE) pursues its statutory mission to promote knowledge about entomology and research into entomological problems. Entomological research comprises all branches of basic and applied entomology. Nature conservation is explicitly promoted. At a workshop organised by the DGaaE, the following causes of insect decline were identified: lack of border structures and fallow land in agriculture, increasingly large crop fields, lack of crop rotation, increasing fertiliser use, continuing land conversion, improper use of insecticides, transformation of flower-rich gardens into stone deserts, environmental and light pollution, increasing traffic, invasive species, and climate change. Halting this development requires a rethink in many areas to promote insect diversity in the future. These include changes in consumer behaviour, agricultural reorientation, urban and rural flowering strips, more border structures, urban development and education.