P32 labelling of codling moth (Cydia pomonella L.)

Abstract

Newly emerged male codling moths were labelled by p32 as orthophosphate in a feeding period of 24 hr. Transference of isotope material to females was achieved by mating. Radioactive spermatophores were detected by autoradiography in 95 % of females caged with treated males. A concentration of 0•1 me per ml appeared to give optimum results. No detrimental effect on reproductive potential was evident at concentrations as high as 0.44 mc per ml.