Bonus Magazine Spring Summer 2023

Graph 1: The percentage of white and yellow maize samples from the 2020 - 2021 report that tested positive eleven s published shortly. Below is a graph from the 2020 - 2021 report which shows the percentage of white and yello that tested positive for the mycotoxins fumonisin, deoxynivalenol (DON) and zeralenone ove seasons. • Fumonisin – 20 to 40 % of all samples tested positive. • Deoxynivalenol – The number of samples testing positive has gradually increased from 1 %. Since the 2017 - 2018 season, at least 60 % have tested positive. • Zeralenone – 5 to 10 % of all samples tested positive. • Aflatoxins – over the 18 seasons of testing, only 5 samples have tested positive for aflatoxi The graph below shows the DON concentration range in yellow maize samples over the la There has been an increase in the percentage of samples with higher DON levels. During this been higher summer rainfall and the occurrence of late rains well into the harvest season. Graph 2: The DON concentration range in yellow maize samples over the last eight seasons. Figure 2: The DON concentration range in yellow maize samples during the last eight seasons. www.agribonus.co.za Spring/Summer 2023 BONUS 27