A field experiment is a basic tool in plant protection research as well as in other agricultural disciplines. Any field experiment in plant protection should fulfill basic requirements of ..good experimental practice" but in addition also standards elaboratored by Food and Agriculture Organization (FAO) and/or European Plant Protection Organization (EPPO). Until 1995 EPPO elaboratored one general and over 180 standards/guidelines referring to multi-approach evaluation of plant protection products. These EPPO standards/guidelines are briefly characterized.