The effects of gypsum on pod-yield and pre-harvest aflatoxin contamination in selected peanut cultivars of Zambia

Hendrix, M C and Obed, I L and Alice, M M and Elijah, P and Jones, Y and Samuel, C N and Rick, B (2020) The effects of gypsum on pod-yield and pre-harvest aflatoxin contamination in selected peanut cultivars of Zambia. African Journal of Plant Science, 14 (3). pp. 134-138. ISSN 1996-0824

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Good agricultural practices are an effective means of minimizing pre-harvest aflatoxin contamination in peanuts. A field experiment was conducted to evaluate the effect of gypsum on pod yield and aflatoxin contamination in three peanut cultivars (Kadononga, MGV 4 and MGV 5) in Zambia. The experiment was conducted in Chongwe and Lusaka districts. Gypsum (15.6 % calcium) was applied at rates of 0 and 400 kg/ha at flowering stage. Although gypsum had no significant effect on aflatoxin contamination, there were significant differences (p = 0.009) in cultivar susceptibility to aflatoxin contamination. The cultivar with the smallest kernels had 18.8% lower aflatoxin content than the large-kernelled cultivar. Additionally, gypsum did not have a clear effect on pod yield. For instance, gypsum was associated with 44.8% more grain-filled pods in Kadononga (p = 0.005) at the site in Lusaka, but this result did not apply to the other two cultivars. At the site in Chongwe, gypsum was associated with 34.6% higher pod yield of MGV 5 only (p = 0.006). These results further suggest that plant factors such as kernel size may have an influence on natural resistance to aflatoxin contamination in peanuts.

Item Type: Article
Divisions: Research Program : East & Southern Africa
Uncontrolled Keywords: Aflatoxin, Gypsum, Peanut cultivar, Pod-yield, Zambia
Subjects: Mandate crops > Groundnut
Others > Plant Disease
Others > Aflatoxins
Depositing User: Mr Arun S
Date Deposited: 30 Mar 2021 06:23
Last Modified: 30 Mar 2021 06:23
Official URL:
Acknowledgement: This study was funded by the Peanut and Mycotoxin Innovation Laboratory under the Southern African Value Chain Project through the U.S. Agency for International Development, under the terms of Award No. AID-ECG-A-00-07-0001 to The University of Georgia as management entity for the U.S. Feed the Future Innovation Lab on Peanut Productivity and Mycotoxin Control.
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