Further Data On the Effect of Ammonia On the Termination of Diapause in Eggs of Teleogryllus Commodus (Walk.) (Orthoptera: Gryllidae)

Abstract

The relationship between the concentration of ammonia and the period of application required to cause termination of diapause in T. commodU8 eggs was determined. Aliquots of ammonium hydroxide of specified concentration were used as a source of gaseous ammonia. It was shown that the higher the concentration of the ammonia the shorter was the period of exposure required to give a significant rise in the rate of termination of diapause. The extent to which the period could be reduced by raising the concentration was limited by the onset of toxicity at the higher concentrations.