eprintid: 11390
rev_number: 11
eprint_status: archive
userid: 3170
dir: disk0/00/01/13/90
datestamp: 2020-03-13 08:30:31
lastmod: 2020-03-13 08:31:56
status_changed: 2020-03-13 08:30:31
type: article
metadata_visibility: show
creators_name: Hendrix, M C
creators_name: Obed, I L
creators_name: Alice, M M
creators_name: Elijah, P
creators_name: Jones, Y
creators_name: Njoroge, S M C
creators_name: Rick, L B
creators_name: David, J
icrisatcreators_name: Njoroge, S M C
affiliation: Department of Soil Science, University of Zambia, (Lusaka)
affiliation: ICRISAT (Lilongwe)
affiliation: Department of Entomology and Plant Pathology, North Carolina State University,(Raleigh)
affiliation: Department of Crop and Soil Sciences, North Carolina State University,(Raleigh)
country: Zambia
country: Malawi
country: USA
title: Predicting aflatoxin content in peanuts using ambient temperature, soil temperature and soil moisture content during pod development
ispublished: pub
subjects: Zam1
subjects: gh5
subjects: s1.3
subjects: s2.11
subjects: s40051
divisions: CRPS5
full_text_status: public
keywords: Aflatoxin, Groundnut, Linear regression, Statistical model, Zambia
note: This study was mainly 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
the management entity for the U.S. Feed the Future
Innovation Lab on Peanut Productivity and Mycotoxin
Control. Partial funding from the University of Zambia,
Directorate of Research and Graduate Studies under the
2017/18 Research Seed Money Award to Mr. Hendrix
Chalwe facilitated field experiments conducted in the
2017/2018 cropping season.
abstract: Higher than acceptable aflatoxin levels in peanut kernels (Arachis hypogaea L.) and related products is
a worldwide food safety concern. Strict regulatory standards by major importers of peanuts limit the
marketability of peanuts for many developing tropical countries including Zambia. The incidence of preharvest
aflatoxins is strongly linked to soil and weather conditions during pod-development. This study
aimed to formulate statistical models to predict total aflatoxin content in peanut kernels using selected
environmental factors during pod development. Field experiments were conducted for two years during
which the peanut crop was exposed to 84 combinations of ambient temperature, soil temperature and
soil moisture content measured during the last 30 days of pod development. These data were used to
formulate regression models to predict total aflatoxin content in peanut kernels. Simple linear
regression models had R2 values of 0.30 for maximum ambient temperature, 0.24 for soil temperature
and 0.38 for soil moisture content. Combining soil moisture content and soil temperature in a
multivariate regression model could explain 54% of the variation in total aflatoxin content while a
combination of soil moisture content and maximum ambient temperature could only explain 46% of the
variation in total aflatoxin content.
date: 2019-03
date_type: published
publication: African Journal of Plant Science
volume: 13
number: 3
publisher: Academic Journals
pagerange: 59-69
id_number: doi:10.5897/AJPS2018.1742
refereed: TRUE
issn: 1996-0824
official_url: https://doi.org/10.5897/AJPS2018.1742
related_url_url: https://scholar.google.com/scholar?hl=en&as_sdt=0%2C5&q=10.5897%2FAJPS2018.1742&btnG=
related_url_type: pub
citation:   Hendrix, M C and Obed, I L and Alice, M M and Elijah, P and Jones, Y and Njoroge, S M C and Rick, L B and David, J  (2019) Predicting aflatoxin content in peanuts using ambient temperature, soil temperature and soil moisture content during pod development.  African Journal of Plant Science, 13 (3).  pp. 59-69.  ISSN 1996-0824     
document_url: http://oar.icrisat.org/11390/1/ea79eb09acc678531ebbaf643126ebbddaa1.pdf