STOLPEFOTKONSTRUKSJON AV BETONG ELLER STOLPESOKKEL AV BETONG, MED INNSTOEPT BRUDDMEKANISME, OG FREMGANGSMAATE FOR FREMSTILLING AV EN SLIK FOTKONSTRUKSJON ELLER SOKKEL

摘要

PCT No. PCT/SE82/00078 Sec. 371 Date Sep. 30, 1982 Sec. 102(e) Date Sep. 30, 1982 PCT Filed Mar. 19, 1982 PCT Pub. No. WO82/03155 PCT Pub. Date Sep. 30, 1982.A method of controlling noxious insects which lay their eggs on standing crops by providing in the area of the crops a light flow the light intensity of which is varied, with cyclic repetition, gradually between a minimum and a maximum, the light intensity returning momentarily between two succeeding cycles.