The present work was carried out in the lacustrine basin of Metztitlan, Hgo., three sampling of recent sediments were realized in November (2001), April and July (2002) and the organisms of the genus Oreochromis sp were evaluated in April and July (2002). The analyses did following the methodology proposed by...
Maize (Zea mays, L) postharvest problems in tropical areas are a constraint to food security. The maize weevil (MW), Sitophilus zeamais (Motsch.) is a pest that causes severe losses in developing countries. This thesis examines the biochemical and genetic bases of MW resistance in tropical maize. First, we investigated the...
