1. A method of treating plant soil or media to reduce plant pathogens, comprising:
contacting the plant soil or media with an effective amount of biocontrol composition comprising an isolate of Paenibacillus polymyxa, having ATCC Accession No. PTA-12841, an isolate of Bacillus subtilis spizizenii, having ATCC Accession No. PTA-12842, and an isolate of Bacillus amyloliquefaciens, having ATCC Accession No. PTA-12843, to reduce the effects of the plant pathogens on a plant or seed grown in the plant soil or media.