The influence of weather on the occurrence of aflatoxin b1 in harvested maize from Kenya and Tanzania

Temba, Benigni A.; Darnell, Ross E.; Gichangi, Anne; Lwezaura, Deogratias; Pardey, Philip G.; Harvey, Jagger J.; Karanja, James; Massomo, Said M. S.; Ota, Noboru; Wainaina, James M.; Fletcher, Mary T.; Kriticos, Darren J.

dc.creator	Temba, Benigni A.
dc.creator	Darnell, Ross E.
dc.creator	Gichangi, Anne
dc.creator	Lwezaura, Deogratias
dc.creator	Pardey, Philip G.
dc.creator	Harvey, Jagger J.
dc.creator	Karanja, James
dc.creator	Massomo, Said M. S.
dc.creator	Ota, Noboru
dc.creator	Wainaina, James M.
dc.creator	Fletcher, Mary T.
dc.creator	Kriticos, Darren J.
dc.date	2021-07-26T18:19:45Z
dc.date	2021-07-26T18:19:45Z
dc.date	2021
dc.date.accessioned	2022-10-25T08:51:51Z
dc.date.available	2022-10-25T08:51:51Z
dc.identifier	https://www.suaire.sua.ac.tz/handle/123456789/3780
dc.identifier.uri	http://hdl.handle.net/123456789/91837
dc.description	Journal Article
dc.description	: A study was conducted using maize samples collected from different agroecological zones of Kenya (n = 471) and Tanzania (n = 100) during the 2013 maize harvest season to estimate a relationship between aflatoxin B1 concentration and occurrence with weather conditions during the growing season. The toxins were analysed by the ultra-high-performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) method. Aflatoxin B1 incidence ranged between 0–100% of samples in different regions with an average value of 29.4% and aflatoxin concentrations of up to 6075 µg/kg recorded in one sample. Several regression techniques were explored. Random forests achieved the highest overall accuracy of 80%, while the accuracy of a logistic regression model was 65%. Low rainfall occurring during the early stage of the maize plant maturing combined with high temperatures leading up to full maturity provide warning signs of aflatoxin contamination. Risk maps for the two countries for the 2013 season were generated using both random forests and logistic regression models.
dc.format	application/pdf
dc.language	en
dc.publisher	MDIP
dc.subject	Aflatoxin
dc.subject	Maize
dc.subject	Risk
dc.subject	Modelling
dc.subject	Climate
dc.subject	Kenya
dc.subject	Tanzania
dc.title	The influence of weather on the occurrence of aflatoxin b1 in harvested maize from Kenya and Tanzania
dc.type	Article