[en] 179 abstracts are presented but only 91 of them are in INIS scope and are treated separately. The content is indicated in the headings of the 12 working groups: food irradiation; radiation induced stimulation effects in living organisms; tracer techniques in animal sciences; physical methods; soil-plant relationships; applied mutagenesis; environment pollution; energy in agriculture; genetical methods in pest control; radioisotopes in insect ecology. (qui)