Mould infection and aflatoxin contamination of the peanut kernels harvested from spring and fall crops as affected by artificial inoculation of the seeded kernels withAspergillus flavus andAspergillus niger
✍ Scribed by Chiou, Robin Y-Y; Wen, Y-Y; Ferng, S; Learn, S?P
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 137 KB
- Volume
- 79
- Category
- Article
- ISSN
- 0022-5142
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✦ Synopsis
Spring and fall crops of peanut are grown each year in Taiwan. Mould infection and a¯atoxin contamination of crops as affected by arti®cial inoculation of the seeded kernels with conidia of Aspergillus ¯avus, A niger and a combination of A ¯avus and A niger (inocula b 10 5 CFU kernel À1 ) were determined. Three cultivars, ie Tainan 9, Tainan 11 and Tainan 12, were consecutively grown for fall 1996, spring 1997, fall 1997 and spring 1998 crops with green vegetable pea for rotation. In crops from uninoculated kernels (control), percentages of germination and harvested plants were higher in spring crops than in fall crops. Inoculation with A niger alone or with A ¯avus resulted in various levels of seed and seedling mortality and lower yields of peanut pods than yields of the other inoculation treatments. When harvested and sized (US No 1), kernels were subjected to examination for mould colonisation and analysis of a¯atoxin content. Fairly low percentages were colonised and a¯atoxin contents were low or non-detectable. Colonisation and a¯atoxin content were independent of arti®cial inoculation. Average a¯atoxin contents in the kernels harvested from all cultivars and crops ranged from 0 to 6.1 mg kg À1 . However, the highest levels of a¯atoxin content among samples of the four crops were 4.0, 18.2, 9.6 and 36.7 mg kg À1 , respectively.