Shares in fertiliser group Plant Health Care shot up after it said it had signed an agreement for its plant growth compound Myconate to be sold alongside Dutch seed treatment group INCOTEC's seed treatment packages.No financial terms of the deal were disclosed."This is an important breakthrough in our strategy to gain market penetration for Myconate" said John Brady, chief executive of Plant Health Care. "INCOTEC is an excellent partner and a major player in seed treatment with a worldwide customer base, with whom we look forward to working closely."Shares in Plant Health were up by 9.55% at 1.55pm.Myconate is a patented, synthetic compound that is used to stimulate fungi in soil, improving crop yields.---RG