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Poster De Conférence Année : 2014

Reduce pesticides to increase earthworm abundance in agricultural systems

Résumé

The loss of biodiversity due to agricultural intensification was a major environmental issue that called for the design of new cropping systems such as organic farming and low-input cropping systems. However, the potential benefits of such systems have not yet been precisely assessed. Earthworms may be affected by pesticide applications, especially species living in contact with the soil surface. Based on empirical data obtained from conventional and organic cropping systems in different sites near Paris, we established simple relationships between the Treatment Frequency index (a phytosanitary indicator of pesticide pressure) and the abundance of three earthworm species (Allolobophora chlorotica, Lumbricus castaneus and L. terrestris). Insecticides have more negative influence on earthworm species than herbicides and fungicides. We also found that species living in the soil's surface layer were the most affected by pesticides. If the Treatment Frequency Index was halved, as is currently required by some European regulations, density of these three earthworm species could be multiplied by a factor 1.5-4. This could represent an important functional benefit for agroecosystems.
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Dates et versions

hal-01173299 , version 1 (07-07-2015)

Identifiants

  • HAL Id : hal-01173299 , version 1
  • PRODINRA : 264545

Citer

Céline Pelosi, François Chiron, Florence Dubs, Mickael Hedde, Audrey Muratet, et al.. Reduce pesticides to increase earthworm abundance in agricultural systems. ISSE 10, Jun 2014, Athens, United States. 2014. ⟨hal-01173299⟩
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