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Effects of postharvest handling practices on quality of groundnuts and aflatoxin contamination

OAR@ICRISAT

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Relation http://oar.icrisat.org/11391/
https://doi.org/10.21608/nrmj.2019.37214
doi:10.21608/nrmj.2019.37214
 
Title Effects of postharvest handling practices on quality of groundnuts and aflatoxin contamination
 
Creator Dambolachepa, H B
Muthomi, J W
Mutitu, E W
Njoroge, S M C
 
Subject Post Harvest Management
Groundnut
Aflatoxins
 
Description The increased cases of aflatoxin contamination are exacerbated by poor post-harvest management practices,
coupled with adverse climatic conditions at harvest and post-harvest stages. This study therefore was carried out
to improve safety and quality of groundnuts from aflatoxin contamination, through use of proper postharvest
handling practices. Specifically the study determined the effects of harvesting dates and drying methods on
aflatoxin contamination. Field experiments were carried out both at Chitedze and Chitala Agricultural Research
Stations in Malawi during 2017/2018 growing season. A randomized complete block design in a split plot
arrangement with three harvesting dates as the main plot and four drying methods as the sub-plots replicated three
times was used. Groundnut was assessed for kernel infection by Aspergillus flavus, and level of aflatoxin
contamination. Significantly low levels of about 0.5μg/ Kg of A. flavus infection and aflatoxin contamination
were observed at 90 days after sowing (DAS). Higher aflatoxin contamination of up to 5μg/ Kg was observed at
80 DAS, and 10 days late after physiological maturity (100 DAS). This study also identified Mandela cock, aframe
drying rack as effective drying method that can reduce aflatoxin contamination in groundnuts by 75 %.
Moreover, Mandela cock drying method was shown as the most effective compared to A-frame and drying rack
drying method. Current study therefore recommends for adoption of timely harvesting at physiological maturity,
and drying using either Mandela cock or A-frame and drying rack. Further studies need to be carried on biological
control of aflatoxin contamination.
 
Date 2019-06
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/11391/1/article_37214_c538e204856b365b8b491b7a855ca13a.pdf
Dambolachepa, H B and Muthomi, J W and Mutitu, E W and Njoroge, S M C (2019) Effects of postharvest handling practices on quality of groundnuts and aflatoxin contamination. Novel Research in Microbiology Journal, 3 (3). pp. 396-414. ISSN 2537-0294