[Exposure to residues on plant surfaces following the use of plant pesticides in the greenhouse].

Organosphosphorus and carbamate insecticides are quite often used in greenhouses. They represent a group of active principles of toxicological relevance. Initial residues on the surface of cucumber, tomato and ornamental plants, and half-life periods for residue degradation are outlined for carbendazim, dimethoate, fenazox, malathion, methamidophos and pirimiphos-methyl. Residues on plants, concentration in the air, dermal exposition, and inhibition of serum choline esterase activity are shown for methamidophos and aldicarb, respective reentry times being discussed. On harvest and cultivation in greenhouses, dermal exposition as a rule is more relevant than inhalation.