從不同期作之落花生受黃麴毒素污染情形顯示，無論春作或秋作，污染率均以乾燥莢果較鮮莢為高；鮮仁及乾仁均可測得黃麴毒素的存在，鮮莢及乾莢均可分離到Aspergillus flavus，但不論是黃麴毒素的含量或A. flavus的分離率則均以春作落花生較秋作落花生為高。另外，春作莢果破損率高於秋作莢果，而夾什物、罹病蟲害率及未成熟莢果百分率，則以乾燥後之莢果較收穫時之莢果為少。
Aflatoxin Contamination in Peanuts from Various Seasons, Location, Drying Methods and Storage Conditions
Yen, C. I. And A. H. Cheng
Surveys were made to explore aflatoxin contamination in peanuts from different seasons, locations, drying methods, and storage conditions in fall 1985 to spring 1987. Five samples, 2kg each, of the variety Tainan Selection No.9 were randomly selected from former harvested products for studies. The investigation items included days of drying by sunlight, seed moisture content, percentage of broken pods, percentage of debris, percentage of pods damaged by pests, percentage of immature pods, percentage of A. flavus-contamination and quantity of aflatoxin in the seeds/pods. Results showed that all the items listed above except the percentage of broken pods after drying, were higher than that in the fresh pods. However, the percentage of debris, the percentage of pods damaged by pests and the percentage of immature pods in the dried pods were lower than that in the fresh pods. The percentage of broken pods after drying was higher in the spring crop than that in the fall crop. Aflatoxin quantity was higher in the fresh pods than that in the dried pods, and it was higher in the spring crop than in the fall crop. The percentage of A. flavus isolated in fresh pods and dried pods were higher in the spring crop than that in the fall crop. The materials for the study of aflatoxin contamination were dried by sunlight or by a machine dryer to adjust the seed moisture content at 15, 13, and 9%. They were separately packed, 20 kg/bag, with nylon or plastic bags, and placed at room temperatures for 6 months. Seed moisture, color of seed coat, percentage of A. flavus-contamination and quantity of aflatoxin in the pods/seeds were surveyed in a month intervals. The results indicated that no correlation was observed between contamination and storage time or quantity of aflatoxin in the pods/seeds. Packing materials also did not influence on the percentage of contamination or quantity of aflatoxin in the pods/seeds.