This project aims to study the diversity and composition of the soil microbial community from potato fields treated either with standard synthetic fungicide mixtures or with our biological control agents alone or in combinations with other low risk compounds. We will examine whether these treatments have a positive or negative effect on soil health and specifically what the effects of both plant pathogens and living biocontrol agents and their effectors are on the soil microbiome. We will also study how best to combine biocontrol agents and low risk compounds both in controlled conditions and in field trials for effective control of potato late blight and potato early blight. We have therefore collected many soil core samples and extracted DNA which has been barcoded and sequenced. We now need to store and analyse these data to detect differences in the microbiome between different samples.