RESULTS OF THE 6TH JOINT PESTICIDE TESTING PROGRAM OF THE IOBC WPRS WORKING GROUP PESTICIDES AND BENEFICIAL ORGANISMS/

The side effects of 5 insecticides, 8 fungicides and 6 herbicides on 2 4 species of beneficial organisms were tested by members of the Workin g Group much-greater-than Pesticides and Beneficial Organisms much-les s-than of the International Organization for Biological Control (IOBC) , West Palaearctic Regional Section (WPRS). The tests were conducted b y 24 members in 11 countries according to internationally approved gui delines. The insecticide buprofezin (Applaud), the fungicides triforin e (Saprol), procymidone (Sumisclex), anilazine (Dyrene), triadimenol ( Bayfidan), hexaconazole (Anvil), tridemorph (Calixin), and the herbici des tralkoxydim (Grasp), bentazone (Basagran) were harmless to nearly all the beneficial organisms. Diflubenzuron (Dimilin) affected spiders and the larvae of predatory insects. The remaining 10 preparations we re more toxic and should therefore be further tested in semi-field and field experiment on relevant organisms.