Attractant trap

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Attractant trap for plum curlers

An attractant trap (also called a pheromone trap) is used to control pests and to determine the size of a pest population, especially insects .

application

Monitoring

To monitor insect infestation in orchards and in the forest , glue traps (usually glue traps) with pheromones are used for diagnosis. So you can z. B. catch species-specific male butterflies, whose caterpillars act as pests. If male butterflies get stuck in the traps, the optimal time for using the insecticide can be determined. This can help avoid unnecessary spraying.

Attractant trap for bark beetles

Bark beetles are usually baited with aggregation pheromones from the males. Slot traps are used to catch them. These are flight traps that consist of opposing impact surfaces and a collecting container. In search of the source of the fragrance, the bark beetles collide with the trap and are directed through slits into a collecting container under the trap. Here they have to be disposed of regularly. The slot trap system works non-toxic. The catches in the traps allow conclusions to be drawn about the swarm intensity and the development of the beetles (old beetles, young beetles, first brood, sibling brood).

Combat

Attractant traps are z. B. Cardboard boxes or tablets provided with species-specific pheromones and glue. The male insects follow the attractants normally given off by females and stick to the glue. As a result, the number of pairings and thus the number of offspring can be reduced in some insect species to such an extent that the damage to agriculture is justifiable. In forestry, attractant traps are not thought to have any harmful effects.

In viticulture and fruit growing , the pest population is determined with pheromone traps (e.g. codling moth , grape moth ) in order to intervene with insecticides if necessary. Attractant traps are also used for monitoring in the corn rootworm . Attractant traps for combating fruit flies are also available in stores.

Certain glass winged species, such as B. the alder glass-winged species , whose large numbers in alder and birch stocks can cause damage, respond very well to pheromone preparations. Sometimes thousands of male butterflies fly to such bait .

See also: confusion method

Pheromone traps for insect control are not to be confused with the confusion method , which also uses pheromones. In the confusion method, the communication system between male and female individuals of an insect species is immediately disturbed. The large-scale application of a scent cloud with a pheromone ampoule confuses the male insects, which reduces the size of the next generation. Multiple dispensers make it possible to control several insect pests at the same time.

Individual evidence

  1. ↑ Bernd Schäfer: Natural substances in the chemical industry , spectrum Akademischer Verlag, 2007, p. 525, ISBN 978-3-8274-1614-8 .
  2. ↑ Günter Ebert (Ed.): The Butterflies of Baden-Württemberg Volume 5, Moths III (Sesiidae, Arctiidae, Noctuidae). Ulmer Verlag, Stuttgart 1997, ISBN 3-8001-3481-0 .
  3. ↑ Bernd Schäfer: Natural substances in the chemical industry , Spektrum Akademischer Verlag, 2007, p. 526, ISBN 978-3-8274-1614-8 .