Synthesis of phenoxyphenyl pyridine and pyrazine carboxamides. Activity against Cydia pomonella (L.) eggs

Several N-(4-phenoxyphenyl)pyridinecarboxamides and N-(4-phenoxyphenyl)pyra zinecarboxamides were synthesized from commercially available material, and their ovicidal activities against Cydia pomonella (L.) were tested. Some o f the tested products showed a moderate activity when <24-h-old eggs were s prayed using a Potter tower. A significant increase in the length of the de velopment also observed in many cases. A clear correlation between both eff ects was period of the eggs was noticed: the products that produced higher mortality also produced higher increase of the length of the development. T hese results seem to confirm our hypothesis that these compounds could be d efined as a juvenile hormone analogues.