Organic versus conventional management in an apple orchard: effects of fertilization and tree-row management on ground-dwelling predaceous arthropods
Type de document
journalArticle
Langue source
Anglais
Titre français
Titre anglais
Organic versus conventional management in an apple orchard: effects of fertilization and tree-row management on ground-dwelling predaceous arthropods
Auteur(s)
- MIÑARRO M
- ESPADALER X
- MELERO V X
- SUÁREZ-ÁLVAREZ V
Editeur(s)
Autre(s)
Id
3B4DAYYU
Version
2300
Date ajout
6 janvier 2021 16:24
Date modification
6 janvier 2021 16:24
Résumé anglais
1 Organic and conventional management of apple orchards may have a different
effect on arthropod communities.
2 We conducted a 3-year study to assess the effect of two strategies of fertilizer
treatment (organic versus chemical) and three tree-row management systems
(straw mulching, tillage and herbicide) on activity-density and biodiversity of
epigeic predators. Ground beetles (Carabidae), rove beetles (Staphylinidae), ants
(Formicidae) and spiders (Araneae) were sampled monthly with pitfall traps in
the same apple orchard during 2003, 2004 and 2005.
3 A total of 4978 individuals were collected. Carabids (56.8% of the total catches)
were the most abundant taxonomic group, followed by spiders (20.7%), ants
(14.8%) and rove beetles (7.7%). Tree-row management had a greater influence
on predator catches than fertilizer treatment. Total predator catches were lower
under the mulch. Mulching also reduced carabid abundance, but increased
staphylinid catches.
4 Tree row management also had a significant effect on biodiversity parameters.
Species richness did not significantly differ among treatments for ants, spiders or
the total catches, but was higher on herbicide-treated plots for carabids and on
mulched plots for staphylinids. Shannon – Wiener’s diversity index was significantly
greater in the mulched and herbicide treated plots for total predators and
carabids. For staphylinids, this index was significantly greater on the mulched
plots. Fertilizer application strategy only influenced the species richness of rove
beetles, which was greater in the chemically-treated plots.
5 The results showed that a change from conventional to organic fertilizer treatment
of apple trees may be performed without differential effects on predator activitydensity
or biodiversity. However, a change from herbicide treatment to mulching or
mechanical weed control may be significant, depending on the taxonomic group.
Note
None
CRAW tags
- AB - Modalité bio
- FREDO fertilisation
- FREDO lutte
- GEO Espagne
- orchard
- predator
- apple
- arthropods
- biodiversity
- carabids
- conservation
- herbicide
- labour
- management
- mulch
- pomme
- spider
- verger
WEB tags
Titre de la publication
Agricultural and Forest Entomology
Pages
10
Date caractères
2008
Date publication
1 janvier 2008