High concentration of airborne particles was detected in greenhouse air after suspended particulate pesticide spraying. The reduction of aerial concentration of resprirable particulate pesticide was relatively slow.
To study the potential health effects of inhaled pesticide, the animals were exposed to the pesticide, methidathion particles in the inhalation exposure chamber. The exposed pesticide particles were approximately 2.16 μm mass median diameter.
The animals exposed to suspended particulate pesticide had a considerable amount of particles within alveolar macropharges and alveolar epithelia. The serious lesion of alveolar epithelia and capillary endothelia of the animals occured after inhalation of methidathion particles.
The vacuolar degeneration of hepatic cell was also cytosol decreased significantly after inhalation of methidathione particles.
The exposure to suspended particulate methidathion induced production of thiobarbituric acid reacting substances (TBARS) in hepatic cells of the exposed animals. The induction of TBARS formation in hepatic cells was remarkable at early period of exposure.
The change of serum transaminase (GOT) activities after exposure to methidathion particle was remarkable. GOT activities also markedly increased at early period of exposure.

To study the potential health effects of suspended particulate pesticide-Supracide FD, the animals were exposed to the pesticide particle in the inhalation exposure chamber. The suspended particulate pesticide was approximately 2.16μm mass median diameter.
The animals exposed to suspended particulate pesticide had a considerable amount of particles throughout the alveolar region.The particles deposited mainly within alveolar macropharge and alveolar epithelium. The epithelial lesion of the pulmonary tissue and the vacuolar degeneration of hepatic cell of the animals occured after inhalation of pesticide particle.
The exposure to Supracide FD induced production of more thiobarbituric acid reacting substances (TBARS) in comparison to the controls. The change of serum GOT and LDH activities after exposure to pesticide particle was also remarkable. The exposure to the pesticide particle caused no significant effect on the serum cholinesterase activity.

Paraquat is one the most popular herbicides in agriculture in Japan. To study the chronic toxicological effects of paraquat on animals, rats were fed a paraquat-containing diet for 1 year and 2 months (1, 5, 25mg/kg of body weight/day). Paraquat administration induced serious histochemical changes in various organs, such as the lung, heart, kidney and liver in rast. Pulmonary fibrosis occurred in the group of rats given 1mg paraquat/kg of body weight/day in diet.
The alkaline phosphatase activity and creatinine content in the blood serum significantly increased. The concentrations of cholesterol, triglyceride and phospholipid in the serum decreased significantly.
A significant increase of lipid peroxidation was observed in the brain, kidney and liver.