The application of biological pesticides: Limitations and a practical solution

Biopesticides and agrichemicals are applied using basically the same equipment. The limitations imposed on biological or conventional chemical pesticides by current application systems are discussed. In general, any pesticide must be applied into a crop using the commonly used application system in that crop. This will normally be the hydraulic nozzle. Researchers attempting to increase the efficacy of a biopesticide by changing application system should bear in mind the constraints set by farmers on altering their usual spraying practices. These constraints are considered along with the criteria required for the successful market introduction of a novel application system. A novel application system, the “double nozzle” is introduced, which fulfils the criteria discussed, in particular the reduction in terms of amount of active ingredient required for pest control. The scientific rationale for this new system is explained, and its performance discussed.