A method for the control of microorganisms, fungi or oomycetes in agriculture, said method comprising applying to plants or to the environment thereof, an anti-microbial, anti-fungal or anti-oomycetes effective amount of a combination of: (i) an agriculturally acceptable acidifying agent, and (ii) an agriculturally acceptable source of nitrite ions or a nitrate precursor thereof, wherein the combination of (i) and (ii) acts as a source of nitric oxide.
The acceptable acidifying agent may be an organic or inorganic acid, such as citric acid, phosphoric acid, sulphuric acid, salicylic acid, ascorbic acid, acetic acid, fulvic acid, lactic acid, glycolic acid or humic acid. The source of nitrite ions may be sodium nitrite, sodium nitrate, potassium nitrite or potassium nitrate. Systems and compositions for use in this method are also described and claimed.
BENJAMIN NIGEL [GB]; TALBOT NICHOLAS JOSE [GB]; KERSHAW MICHAEL JOSE [GB]; WINYARD PAUL [GB]
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