Ground-living predators of the apple fruit moth Argyresthia conjugella (Zell.)
Field studies were conducted in two orchards to investigate what type of ground- living predators that prey on the apple fruit moth during hibernation. Two tasks were addressed: 1) hibernation loss of the apple fruit moth was quantified, and 2) effect of the different predator groups were identif...
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| Formato: | Otro |
| Lenguaje: | sueco Inglés |
| Publicado: |
2006
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| Materias: | |
| Acceso en línea: | https://stud.epsilon.slu.se/12428/ |
| Sumario: | Field studies were conducted in two orchards to investigate what type of ground-
living predators that prey on the apple fruit moth during hibernation. Two tasks were
addressed: 1) hibernation loss of the apple fruit moth was quantified, and 2) effect of
the different predator groups were identified. This was done in a spring experiment
and an autumn to spring experiment with mesh exclusion cages. The results were
analyzed with the GLIMMIX procedure in SAS. The field studies were
complemented with feeding tests in laboratory with spiders, ants, staphylinids and
carabids that were supposed to detect and eat apple fruit moth pupae.
In spring and autumn, large insects between 5 to 11 mm, were the major
predator of the apple fruit moth, while the smaller insects of sizes 0-5 mm, dominated
the predation during winter. Small rodents (11-20 mm) had little or no predation
effect on the apple fruit moth pupae, probably because the pupae were too small to be
detected as a food source. Both ground-beetles (Pterostichus sp. and Harpalus latus)
and staphylinids were able to detect and eat apple fruit moth pupae in the feeding test.
Spiders and ants did not eat apple fruit moth pupae in the feeding test. |
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