Cooperative development between Horstine Farmery Ltd., Rhone-Poulenc Ag Co. and John Deere Seeding Group has resulted in the commercial introduction of a new pesticide applicator rotor named ChemMiser ™ that improves granular chemical application efficiency. Extensive tests confirm good performance and durability of the new rotor. Performance tests of ChemMiser™ using a gypsum formulation simulant indicates that excessive row end rates can be reduced by 38% and loss of granules during equipment transport can be reduced by 91% as compared to performance with the standard pesticide rotor used on a John Deere MaxEmerge 2 planter. Similar responses have been observed with a clay formulation simulant typical of many other granular pesticides. Horstine Farmery currently offers the ChemMiser™ rotor as a replacement kit for the John Deere MaxEmerge 2 planter's standard pesticide applicator rotor. John Deere Seeding Group plans to start installing the new rotor design into new John Deere MaxEmerge 2 planters in June, 1996, as well as, offer replacement kits through John Deere's parts distribution network. The ChemMiser™ rotor concept is adaptable to other planter brands and models.