NIKOS RODITAKIS~ DARIA LIASHENKOa, LUDMILA BARANOVAa and ... 'Institute of Bioorganic Chemistry, National Academy o Sciences of the Ukraine, Murmanskaya StK, I , KIEV-94, 253094, UKRAINE and Plant Protection Insti- tute, NAGREE Kastorias 35, Katsahas Heraclion, 71110, Crete, Greece ... The synthesis of new organophosphorus and organosilicon compounds possessing insect juvenile hormone activity is described. The structure of the ...