title: Pesticide legislation and residue problems in Portugal.
mesh_terms: D000383:Agriculture; D003634:DDT / Q000032:analysis; D004348:Drug Labeling; D005504:Food Analysis; D007880:Legislation, Drug; D008452:Maximum Allowable Concentration; D010575:Pesticides / Q000633:toxicity; D011174:Portugal
chemical_list: D010575:Pesticides; D003634:DDT