Double Nickel is a broad-spectrum preventative biofungicide/bactericide for control of fungal and bacterial plant diseases. The active ingredient is beneficial bacterium Bacillus amyloliquefaciens strain D747. When applied to soils, Double Nickel colonizes plant root hairs, preventing establishment of disease-causing fungi and bacteria. It can be applied alone or in combination and/or rotation with other fungicides as part of an integrated disease management plan in agricultural crops, ornamental, and nursery plants, and turfgrass. Double Nickel can be applied up to and including the day of harvest.