What do you think is the most likely or serious threat or hazard confronting the Food & Agriculture sector?

What do you think is the most likely or serious threat or hazard confronting the Food & Agriculture sector? Is it agroterrorism, EMA/food fraud, naturally occurring diseases or infestations–including pandemic diseases such as Coronavirus/COVID-19 affecting workers in food processing plants or the supply chain, or something else? Who would be the most likely aggressors in cases of intentional contamination of food supplies?