Abstract

CORDOBA VARGAS, Cindy Alexandra  and  LEON SICARD, Tomás. EFFECTS OF AGROECOLOGICAL AND CONVENTIONAL HANDLING IN SLUG POPULATIONS IN LETTUCE IN TENJO CUNDINAMARCA. Acta biol.Colomb. [online]. 2010, vol.15, n.1, pp.115-128. ISSN 0120-548X.

In an organic (FE) and a conventional (FC) farm system the population behavior of slugs and their relationship with some carabids predators was compared, as well as, the presence of weeds, agricultural practices and productivity of four varieties of lettuce. Weekly catches of slugs were made and the damage level, height and the number of leaves in ten plants was measured. Weeds and carabids were collected in both farms. The total number of slugs in the FE was statistically higher and four species (D. reticulatum, Milax gagates, D. and L. laev maximux) were collected compared with two found in FC. With the exception of the variety "Morada Lisa", there were no significant differences in the level of damage in the other varieties between the two farms. There were significant differences in the dry weight variable in favour of the organic farm. In FE, 5 carabids species and 25 weeds were presented compared to none in FC and 6, respectively. The data above are explained in terms of the agronomic practices of each management system.

Keywords : organic, conventional; slugs; lettuce; carabids; lettuce; Lactuca sativa.

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