抄録
The research study was intended to clarify the actual situation of pesticide exposure of farmers following citrus fruit cultivation in greenhouse. The aerial concentration and the dermal exposure amount were measured for Kelthane, Salithion, and DMTP sprayed by power sprayer. These were 33%, 25%, and 40% wettable powder respectively. The cycle of pesticide spraying, the sorts of pesticides, and the working hours in greenhouse were also investigated.
It was summarized as follows;
1. The aerial concentration around the operator was estimated a little small. And that was about 30μg/m3 for Kelthane whose available component was diluted 3030-fold, and about 140μg/m3 for 4000-fold diluted Salithion. The evaporability of Salithion was remarkable, and its aerial concentration was considerably higher than that of others during spraying and after.
2. The dermal exposure amount was verry large. This exposure amount at face was about 0.05μg/cm2·min for 3030-fold diluted Kelthane and about 0.02μg/cm2·min for 3800-4000-fold diluted Salithion or DMTP.
3. Pesticide was sprayed once a month, and the total number of spraying was 5-7 through eight months cultivation. About 10 kinds of pesticide were used. The working hours in greenhouse was about 10 hours per ten ares in ten days for a man and about 3 hours for a woman. Compared with a case of vegetable cultivation, this working hours was so small that the exposure to pesticide residues was estimated verry small.
