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mating disruption, sexual confusion (GB)

Designation of the biotechnology developed for the first time in the 1940s for the environmentally friendly control of vine pests in the context of the pest Management, It is also called "confusion" or "mating disorder". The procedure has become very popular and has been used since the 1980s viniculture practiced on a large scale. It is very specific species-specific, effective only for certain insects pheromones (Sexual Fragrances) synthetically produced and applied in the vineyard. In nature, the males are attracted by the fragrances of the female. Although these still give off this substance, but it goes down in the cloud sprayed over a wide area. As a result, the males are confused, can follow any single track and the mating of females is prevented.

Crossed grape wrapper / pheromone dispenser

For that, the apt term "No sex for butterflies" was created. The inseminated, sterile eggs are indeed deposited, but do not produce larvae. Before the widespread spraying is determined by pheromone traps the time of flight and the flight strength and thus the ideal control point. 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 examination result, the pheromones are now applied in different ways in the vineyard. The most common are filled with the drug dispenser, of which usually 500 pieces are distributed on one hectare. A special form are the so-called spaghetti dispensers, in which the pheromones are incorporated in plastic wires and these are tied to the vines. The big advantage of the Verwirrmethode is that no damage to the environment (soil, water), humans or animals are associated with it and no residues on the crop arise.

This will reduce the amount of chemical insecticides significantly reduced and an increase in the beneficials reached. That's why it's a recognized one ecological Method. It will succeed in the pests Essigfliege. Springwurmwickler and grape applied. The method is one of the most widely used environmentally friendly pest control measures in the context of biological or. Integrated pest management, See also the topic under Organic (organic) viticulture,

Picture left: © Todd M. Gilligan - USDA
Picture right: By Roger Kreja, Stuttgart - Own work, CC BY-SA 3.0 , Link

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