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mating disruption, sexual confusion (GB)

Term for the biotechnology developed for the environmentally friendly control of vine pests in the context of the pest Management, It is also known as a "confusion process" or "mating disorder". The process has established itself very quickly and has also been used since the 1980s viniculture practiced on a large scale. Species-specific species-specific, effective only for certain insects pheromones (Sexual fragrances) synthetically produced and applied in the vineyard. In nature, males are attracted by the fragrances of the female. These still give off this substance, which, however, is lost in the widely sprayed cloud. As a result, the males are confused, cannot follow a single track and the mating of the females is prevented.

Crossed grape wrapper / pheromone dispenser

The appropriate term "No sex for butterflies" was created for this. The inseminated, sterile eggs are laid, but do not produce larvae. Before the wide-area spraying, pheromone traps determine the flight time and the flight strength and thus the ideal time to fight. These devices consist of a small container with the specific pheromone and a glue strip. Depending on the number of males caught, the projected size is determined.

Depending on the result of the investigation, the pheromones are now deployed in the vineyard in various ways. The most common are dispensers filled with the active ingredient, of which 500 are usually distributed over one hectare. A special form are the so-called spaghetti dispensers, in which the pheromones are incorporated into plastic wires and bound to the vines. The great advantage of the confusion method is that it does not cause any damage to the environment (soil, water), people or animals and that no residue is left on the crop.

This increases the amount of chemical insecticides significantly reduced and an increase in beneficials reached. Therefore it is recognized ecological Method. It becomes successful with the pests Essigfliege. Springwurmwickler and grape applied. The method is one of the most used environmentally friendly measures for pest control in the context of biological respectively. Integrated crop protection, See also on the topic below Organic (ecological) viticulture,

Left picture: © Todd M. Gilligan - USDA
Right: By Roger Kreja, Stuttgart - Own work, CC BY-SA 3.0 , Link

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