Organic phosphate pesticides were responsible for 80 percent of 175 cases diagnosed as systemic poisoning and 47 percent of another 160 reports describing digestive and other nonlocalized symptoms of illness. Finallyfarm laborers accounted for more than half (381) of the 727 reports of occupational disease attributed to agricultural chemicals... The Stanford Research Institute stresses that these findings are only partial and in fact. understate the real problem. It reports thatMany occupational pesticide "poisonings" are never reported for treatment. particularly by migrant and itinerant workers. Many occupational pesticide "poisonings" that are reported are inaccurately diagnosed. Data on some occupational pesticide poisonings that are reported and are accurately diagnosed may never be brought to the attention of state and federal data collection agencies.